A physical quantity of the dimensions of length that can be formed out of c, G and (e^2)/(4πε_0) is [c is velocity of light, G is universal constant of gravitation and e is charge] :

(1)/(c^2) [G(e^2)/(4πε_0) ]^1/2

NEET 2017 May 07 Question Paper with Solutions

Q: How many questions are in the NEET 2017 May 07 paper?

The NEET 2017 May 07 paper has 179 questions — Physics (44), Chemistry (45) and Biology (90). Every question is on this page with its correct answer and a step-by-step solution.

Q: What is the marking scheme for NEET?

NEET awards +4 marks for each correct answer and −1 for a wrong answer, with 0 for questions left unattempted. The paper covers Physics, Chemistry and Biology across 180 questions for 720 marks.

Q: Are the answer key and step-by-step solutions provided for the 2017 May 07 paper?

Yes — every question shows the correct answer (answer key) and a detailed step-by-step solution, free to read online.

Q: Can I take the NEET 2017 May 07 paper as a timed mock test?

Yes. With a free NEETnify account you can attempt this exact paper as a timed test in the real exam interface, then see your score and weak-area analysis.

All 179 questions from the NEET 2017 (May 07) paper — Physics (44), Chemistry (45) and Biology (90) — each with the correct answer (answer key) and a step-by-step solution. Read it free online, or attempt the full paper as a timed mock test.Physics PYQs 2017 Chemistry PYQs 2017 Biology PYQs 2017

Questions: 179
Physics: 44
Chemistry: 45
Biology: 90

Physics44 questions

Q1Single correctCurrent Electricity

A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves :

(1)

cells

(2)

potential gradients

(3)

a condition of no current flow through the galvanometer

(4)

a combination of cells, galvanometer and resistances

Q2Single correctKinetic Theory of Gases

A gas mixture consists of 2 moles of

O_{2}

and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is :

(1)

4 RT

(2)

15 RT

(3)

9 RT

(4)

11 RT

Q3Single correctNuclei

Radioactive material 'A' has decay constant '

8 λ

' and material 'B' has decay constant '

λ

'. Initially they have same number of nuclei. After what time, the ratio of number of nuclei of material 'A' to that of 'B' will be

\frac{1}{e}

(1)

\frac{1}{λ}

(2)

\frac{1}{7 λ}

(3)

\frac{1}{8 λ}

(4)

\frac{1}{9 λ}

Q4Single correctMechanical Properties of Fluids

A U tube with both ends open to the atmosphere, is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a distance of 10 mm above the water level on that side. Meanwhile the water rises by 65 mm from its original level (see diagram). The density of the oil is :

U tube open at both ends, marked P_a above each arm. The left arm holds oil from level A down to level B, the right arm and the bend hold water. Dashed levels: A to F at the oil surface, E the final water level 10 mm below F, D the initial water level 65 mm below E, and B to C a further 65 mm below D.

(1)

650 kg m^{- 3}

(2)

425 kg m^{- 3}

(3)

800 kg m^{- 3}

(4)

928 kg m^{- 3}

Q6Single correctDual Nature of Radiation and Matter

The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m, is :

(1)

\frac{h}{mk T}

(2)

\frac{h}{3 mk T}

(3)

\frac{2 h}{3 mk T}

(4)

\frac{2 h}{mk T}

Q7Single correctSystems of Particles and Rotational Motion

One end of string of length

l

is connected to a particle of mass 'm' and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed 'v' the net force on the particle (directed towards centre) will be (T represents the tension in the string) :

(1)

T

(2)

T + \frac{m v ^{2}}{l}

(3)

T - \frac{m v ^{2}}{l}

(4)

Zero

Q8Single correctCurrent Electricity

Figure shows a circuit that contains three identical resistors with resistance

R = 9.0 Ω

each, two identical inductors with inductance

L = 2.0

mH each, and an ideal battery with emf

ε = 18

V. The current 'I' through the battery just after the switch closed is......

(1)

2 mA

(2)

0.2 A

(3)

2 A

(4)

0 ampere

Q9Single correctMotion in a Plane

The x and y coordinates of the particle at any time are

x = 5 t - 2 t^{2}

and

y = 10 t

respectively, where x and y are in metres and t in seconds. The acceleration of the particle at

t = 2

s is :

(1)

0

(2)

5 m/s^{2}

(3)

- 4 m/s^{2}

(4)

- 8 m/s^{2}

Q10Single correctGravitation

Suppose the charge of a proton and an electron differ slightly. One of them is

- e

, the other is

(e + Δ e)

. If the net of electrostatic force and gravitational force between two hydrogen atoms placed at a distance d (much greater than atomic size) apart is zero, then

Δ e

is of the order of [Given mass of hydrogen

m_{h} = 1.67 \times 1 0^{- 27}

kg]

(1)

1 0^{- 20} C

(2)

1 0^{- 23} C

(3)

1 0^{- 37} C

(4)

1 0^{- 47} C

Q11Single correctThermal Properties of Matter

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are

K_{1}

and

K_{2}

. The thermal conductivity of the composite rod will be :

A rectangular composite rod of length d, split lengthwise into an upper half A of conductivity K1 and a lower half B of conductivity K2, with temperature T1 at the left face and T2 at the right face.

(1)

\frac{K _{1} + K _{2}}{2}

(2)

\frac{3 ( K _{1} + K _{2} )}{2}

(3)

K_{1} + K_{2}

(4)

2 (K_{1} + K_{2})

Q12Single correctElectrostatic Potential and Capacitance

The diagrams below show regions of equipotentials.
A positive charge is moved from A to B in each diagram.

Four regions of equipotentials, each running 10 V, 20 V, 30 V, 40 V from A on the left to B on the right: (a) four equally spaced straight lines with the path from A to B drawn across them, (b) four wavy lines, (c) four unequally spaced straight lines, (d) four arcs curving to the right.

(1)

Maximum work is required to move q in figure (c).

(2)

In all the four cases the work done is the same.

(3)

Minimum work is required to move q in figure (a).

(4)

Maximum work is required to move q in figure (b).

Q13Single correctAtoms

The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is :

(1)

2

(2)

1

(3)

4

(4)

0.5

Q14Single correctWave Optics

Young's double slit experiment is first performed in air and then in a medium other than air. It is found that

8^{t h}

bright fringe in the medium lies where

5^{t h}

dark fringe lies in air. The refractive index of the medium is nearly :

(1)

1.25

(2)

1.59

(3)

1.69

(4)

1.78

Q15Single correctOscillations

A particle executes linear simple harmonic motion with an amplitude of 3 cm. When the particle is at 2 cm from the mean position, the magnitude of its velocity is equal to that of its acceleration. Then its time period in seconds is :

(1)

\frac{5}{π}

(2)

\frac{5}{2 π}

(3)

\frac{4 π}{5}

(4)

\frac{2 π}{3}

Q16Single correctThermodynamics

Thermodynamic processes are indicated in the following diagram.
Match the following

Column-1	Column-2
P.. Process I	a.. Adiabatic
Q.. Process II	b.. Isobaric
R.. Process III	c.. Isochoric
S.. Process IV	d.. Isothermal

Pressure-volume diagram with three isotherms labelled 300 K, 500 K and 700 K. From a common initial point i on the 500 K isotherm: process I runs vertically down to the 300 K isotherm, process II curves more steeply than an isotherm down to the 300 K isotherm, process III follows the 500 K isotherm, and process IV runs horizontally right to the 700 K isotherm. Each endpoint is marked f.

(1)

\to

a, Q

\to

c, R

\to

d, S

\to

(2)

\to

c, Q

\to

a, R

\to

d, S

\to

(3)

\to

c, Q

\to

d, R

\to

b, S

\to

(4)

\to

d, Q

\to

b, R

\to

a, S

\to

Q17Single correctElectrostatic Potential and Capacitance

A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system :

(1)

increases by a factor of 4

(2)

decreases by a factor of 2

(3)

remains the same

(4)

increases by a factor of 2

Q18Single correctDual Nature of Radiation and Matter

The photoelectric threshold wavelength of silver is

3250 \times 1 0^{- 10}

m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength

2536 \times 1 0^{- 10}

m is :
(Given

h = 4.14 \times 1 0^{- 15}

eVs and

c = 3 \times 1 0^{8}

s^{- 1}

)

(1)

\approx 6 \times 1 0^{5} ms^{- 1}

(2)

\approx 0.6 \times 1 0^{6} ms^{- 1}

(3)

\approx 61 \times 1 0^{3} ms^{- 1}

(4)

\approx 0.3 \times 1 0^{6} ms^{- 1}

Q19Single correctPhysical World and Measurement

A physical quantity of the dimensions of length that can be formed out of c, G and

\frac{e ^{2}}{4 π ε _{0}}

is [c is velocity of light, G is universal constant of gravitation and e is charge] :

(1)

\frac{1}{c ^{2}} [G \frac{e ^{2}}{4 π ε _{0}}]^{1/2}

(2)

c^{2} [G \frac{e ^{2}}{4 π ε _{0}}]^{- 1/2}

(3)

\frac{1}{c ^{2}} [\frac{e ^{2}}{G 4 π ε _{0}}]^{1/2}

(4)

\frac{1}{c} G \frac{e ^{2}}{4 π ε _{0}}

Q20Single correctWaves

Two cars moving in opposite directions approach each other with speed of 22 m/s and 16.5 m/s respectively. The driver of the first car blows a horn having a frequency 400 Hz. The frequency heard by the driver of the second car is [velocity of sound 340 m/s] :

(1)

350 Hz

(2)

361 Hz

(3)

411 Hz

(4)

448 Hz

Q21Single correctSemiconductor Electronics

In a common emitter transistor amplifier the audio signal voltage across the collector is 3 V. The resistance of collector is 3 k

Ω

. If current gain is 100 and the base resistance is 2 k

Ω

, the voltage and power gain of the amplifier is :

(1)

200

and

1000

(2)

15

and

200

(3)

150

and

15000

(4)

20

and

2000

Q22Single correctSemiconductor Electronics

Which one of the following represents forward bias diode ?

(1)

A terminal at 0 V, a diode with its anode on the left, a resistor R, and a terminal at -2 V.

(2)

A terminal at -4 V, a diode with its anode on the left, a resistor R, and a terminal at -3 V.

(3)

A terminal at -2 V, a diode with its anode on the left, a resistor R, and a terminal at +2 V.

(4)

A terminal at 3 V, a diode with its anode on the left, a resistor R, and a terminal at 5 V.

Q23Single correctMechanical Properties of Solids

A spring of force constant k is cut into lengths of ratio 1 : 2 : 3. They are connected in series and the new force constant is k'. Then they are connected in parallel and force constant is k". Then k' : k" is :

(1)

1 : 6

(2)

1 : 9

(3)

1 : 11

(4)

1 : 14

Q24Single correctSemiconductor Electronics

The given electrical network is equivalent to:

Inputs A and B feed a NOR gate; that gate's output is connected to both inputs of a second NOR gate, whose output passes through a NOT gate to the output Y.

(1)

AND gate

(2)

OR gate

(3)

NOR gate

(4)

NOT gate

Q25Single correctGravitation

The acceleration due to gravity at a height

1 km

above the earth is the same as at a depth d below the surface of earth. Then:

(1)

d = \frac{1}{2} km

(2)

d = 1 km

(3)

d = \frac{3}{2} km

(4)

d = 2 km

Q26Single correctSystem of Particles and Rotational Motion

Which of the following statements are correct?
(a) Centre of mass of a body always coincides with the centre of gravity of the body
(b) Centre of mass of a body is the point at which the total gravitational torque on the body is zero
(c) A couple on a body produce both translational and rotational motion in a body
(d) Mechanical advantage greater than one means that small effort can be used to lift a large load.

(1)

(b) and (d)

(2)

(a) and (b)

(3)

(b) and (c)

(4)

Q27Single correctThermodynamics

A carnot engine having an efficiency of

\frac{1}{10}

as heat engine, is used as a refrigerator. If the work done on the system is

10 J

, the amount of energy absorbed from the reservoir at lower temperature is:

(1)

1 J

(2)

90 J

(3)

99 J

(4)

100 J

Q28Single correctMagnetism and Matter

θ_{1}

and

θ_{2}

are the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip

θ

is given by:

(1)

cot^{2} θ = cot^{2} θ_{1} + cot^{2} θ_{2}

(2)

tan^{2} θ = tan^{2} θ_{1} + tan^{2} θ_{2}

(3)

cot^{2} θ = cot^{2} θ_{1} - cot^{2} θ_{2}

(4)

tan^{2} θ = tan^{2} θ_{1} - tan^{2} θ_{2}

Q29Single correctMoving Charges and Magnetism

An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current 'I' along the same direction is shown in Fig. Magnitude of force per unit length on the middle wire 'B' is given by:

Three wires seen end-on as circles with a central dot, carrying current out of the page: B at the corner, C a distance d to its right, and A a distance d directly below B, with the 90 degree angle at B marked.

(1)

\frac{μ _{0} i ^{2}}{2 π d}

(2)

\frac{2 μ _{0} i ^{2}}{π d}

(3)

\frac{2 μ _{0} i ^{2}}{π d}

(4)

\frac{μ _{0} i ^{2}}{2 π d}

Q30Single correctLaws of Motion / Gravitation

Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will:

(1)

keep floating at the same distance between them

(2)

move towards each other

(3)

move away from each other

(4)

will become stationary

Q31Single correctElectromagnetic Waves

In an electromagnetic wave in free space the root mean square value of the electric field is

E_{r m s} = 6 V/m

. The peak value of the magnetic field is:

(1)

1.41 \times 1 0^{- 8} T

(2)

2.83 \times 1 0^{- 8} T

(3)

0.70 \times 1 0^{- 8} T

(4)

4.23 \times 1 0^{- 8} T

Q32Single correctMechanical Properties of Solids

The bulk modulus of a spherical object is 'B'. If it is subjected to uniform pressure 'p', the fractional decrease in radius is:

(1)

\frac{p}{B}

(2)

\frac{B}{3 p}

(3)

\frac{3 p}{B}

(4)

\frac{p}{3 B}

Q33Single correctWave Optics

The ratio of resolving powers of an optical microscope for two wavelengths

λ_{1} = 4000 \overset{˚}{A}

and

λ_{2} = 6000 \overset{˚}{A}

is:

(1)

8 : 27

(2)

9 : 4

(3)

3 : 2

(4)

16 : 81

Q34Single correctWork, Energy and Power

Consider a drop of rain water having mass

1 g

falling from a height of

1 km

. It hits the ground with a speed of

50 m/s

. Take 'g' constant with a value

10 m/s^{2}

. The work done by the (i) gravitational force and the (ii) resistive force of air is:

(1)

(i)

- 10 J

(ii)

- 8.25 J

(2)

(i)

1.25 J

(ii)

- 8.25 J

(3)

(i)

100 J

(ii)

8.75 J

(4)

(i)

10 J

(ii)

- 8.75 J

Q35Single correctThermal Properties of Matter

A spherical black body with a radius of

12 cm

radiates

450 watt

power at

500 K

. If the radius were halved and the temperature doubled, the power radiated in watt would be:

(1)

225

(2)

450

(3)

1000

(4)

1800

Q36Single correctLaws of Motion

Two blocks A and B of masses

3 m

and

m

respectively are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of A and B immediately after the string is cut, are respectively:

A spring hangs from a hatched ceiling and carries block A of mass 3 m, from which a string hangs supporting block B of mass m.

(1)

g, \frac{g}{3}

(2)

\frac{g}{3}, g

(3)

g,\ g

(4)

\frac{g}{3}, \frac{g}{3}

Q37Single correctWave Optics

Two Polaroids

P_{1}

and

P_{2}

are placed with their axis perpendicular to each other. Unpolarised light

I_{0}

is incident on

P_{1}

. A third polaroid

P_{3}

is kept in between

P_{1}

and

P_{2}

such that its axis makes an angle

4 5^{\circ}

with that of

P_{1}

. The intensity of transmitted light through

P_{2}

is:

(1)

\frac{I _{0}}{2}

(2)

\frac{I _{0}}{4}

(3)

\frac{I _{0}}{8}

(4)

\frac{I _{0}}{16}

Q38Single correctElectromagnetic Induction

A long solenoid of diameter

0.1 m

has

2 \times 1 0^{4}

turns per meter. At the centre of the solenoid, a coil of

100

turns and radius

0.01 m

is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to

0 A

from

4 A

0.05 s

. If the resistance of the coil is

10 π^{2} Ω

, the total charge flowing through the coil during this time is:

(1)

32 π μ C

(2)

16 μ C

(3)

32 μ C

(4)

16 π μ C

Q39Single correctSystem of Particles and Rotational Motion

Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities

ω_{1}

and

ω_{2}

. They are brought into contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is:

(1)

\frac{1}{2} I (ω_{1} + ω_{2})^{2}

(2)

\frac{1}{4} I (ω_{1} - ω_{2})^{2}

(3)

I (ω_{1} - ω_{2})^{2}

(4)

\frac{1}{8} I (ω_{1} - ω_{2})^{2}

Q40Single correctMotion in a Straight Line

Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time

t_{1}

. On other days, if she remains stationary on the moving escalator, then the escalator takes her up in time

t_{2}

. The time taken by her to walk up on the moving escalator will be:

(1)

\frac{t _{1} + t _{2}}{2}

(2)

\frac{t _{1} t _{2}}{t _{2} - t _{1}}

(3)

\frac{t _{1} t _{2}}{t _{2} + t _{1}}

(4)

t_{1} - t_{2}

Q41Single correctSystem of Particles and Rotational Motion

A rope is wound around a hollow cylinder of mass

3 kg

and radius

40 cm

. What is the angular acceleration of the cylinder if the rope is pulled with a force of

30 N

(1)

25 m/s^{2}

(2)

0.25 rad/s^{2}

(3)

25 rad/s^{2}

(4)

5 m/s^{2}

Q42Single correctRay Optics

A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source L. When the mirror is rotated through a small angle

θ

, the spot of the light is found to move through a distance y on the scale. The angle

θ

is given by:

(1)

\frac{y}{2 x}

(2)

\frac{y}{x}

(3)

\frac{x}{2 y}

(4)

\frac{x}{y}

Q43Single correctWaves

The two nearest harmonics of a tube closed at one end and open at other end are

220 Hz

and

260 Hz

. What is the fundamental frequency of the system?

(1)

10 Hz

(2)

20 Hz

(3)

30 Hz

(4)

40 Hz

Q44Single correctRay Optics

A thin prism having refracting angle

1 0^{\circ}

is made of glass of refractive index

1.42

. This prism is combined with another thin prism of glass of refractive index

1.7

. This combination produces dispersion without deviation. The refracting angle of second prism should be:

(1)

4^{\circ}

(2)

6^{\circ}

(3)

8^{\circ}

(4)

1 0^{\circ}

Q45Single correctCurrent Electricity

The resistance of a wire is 'R' ohm. If it is melted and stretched to 'n' times its original length, its new resistance will be:

(1)

n R

(2)

\frac{R}{n}

(3)

n^{2} R

(4)

\frac{R}{n ^{2}}

Chemistry45 questions

Q46Single correctHydrocarbons

With respect to the conformers of ethane, which of the following statements is true?

(1)

Bond angle remains same but bond length changes

(2)

Bond angle changes but bond length remains same

(3)

Both bond angle and bond length change

(4)

Both bond angles and bond length remains same

Q47Single correctThe p-Block Elements

Which of the following pairs of compounds is isoelectronic and isostructural?

(1)

BeCl_{2}, XeF_{2}

(2)

TeI_{2}, XeF_{2}

(3)

IBr_{2}^{-}, XeF_{2}

(4)

IF_{3}, XeF_{2}

Q48Single correctThe d- and f-Block Elements

HgCl_{2}

and

I_{2}

both when dissolved in water containing

I^{-}

ions the pair of species formed is:

(1)

HgI_{2}, I_{3}^{-}

(2)

HgI_{2}, I^{-}

(3)

HgI_{4}^{2 -}, I_{3}^{-}

(4)

Hg_{2} I_{2}, I^{-}

Q49Single correctChemistry in Everyday Life

Mixture of chloroxylenol and terpineol acts as:

(1)

analgesic

(2)

antiseptic

(3)

antipyretic

(4)

antibiotic

Q50Single correctThe Solid State

Which is the incorrect statement?

(1)

FeO_{0.98}

has non stoichiometric metal deficiency defect.

(2)

Density decreases in case of crystals with Schottky's defect.

(3)

NaCl (s)

is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal.

(4)

Frenkel defect is favoured in those ionic compounds in which sizes of cation and anions are almost equal.

Q51Single correctEquilibrium

Concentration of the

Ag^{+}

ions in a saturated solution of

Ag_{2} C_{2} O_{4}

2.2 \times 1 0^{- 4} mol L^{- 1}

. Solubility product of

Ag_{2} C_{2} O_{4}

is:

(1)

2.42 \times 1 0^{- 8}

(2)

2.66 \times 1 0^{- 12}

(3)

4.5 \times 1 0^{- 11}

(4)

5.3 \times 1 0^{- 12}

Q52Single correctAldehydes, Ketones and Carboxylic Acids

Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

(1)

Two cyclohexane rings joined by a single bond; the left ring carries OH on the carbon next to the link, the right ring a C=O on the carbon next to the link.

(2)

Two cyclohexane rings joined by a carbon-carbon double bond, with a C=O on the right ring next to that double bond.

(3)

Two cyclohexane rings joined by a single bond, with OH on the left ring next to the link and no carbonyl.

(4)

Two cyclohexane rings joined by a carbon-carbon double bond, each ring carrying a C=O next to that double bond.

Q53Single correctChemical Bonding and Molecular Structure

The species, having bond angles of

12 0^{\circ}

is:

(1)

PH_{3}

(2)

ClF_{3}

(3)

NCl_{3}

(4)

BCl_{3}

Q54Single correctSolutions

If molality of the dilute solution is doubled, the value of molal depression constant

(K_{f})

will be:

(1)

doubled

(2)

halved

(3)

tripled

(4)

unchanged

Q55Single correctAlcohols, Phenols and Ethers

Which one is the most acidic compound?

(1)

Benzene ring drawn in Kekule form with OH at the top carbon and a CH3 group at the para carbon.

(2)

Benzene ring drawn in Kekule form with a single OH group (phenol).

(3)

Benzene ring drawn in Kekule form with OH at the top carbon and an NO2 group at the para carbon.

(4)

Benzene ring drawn in Kekule form with OH at the top carbon and NO2 groups at both ortho carbons and at the para carbon.

Q56Single correctThe p-Block Elements

It is because of inability of

n s^{2}

electrons of the valence shell to participate in bonding that:

(1)

Sn^{2 +}

is reducing while

Pb^{4 +}

is oxidising

(2)

Sn^{2 +}

is oxidising while

Pb^{4 +}

is reducing

(3)

Sn^{2 +}

and

Pb^{2 +}

are both oxidising and reducing

(4)

Sn^{4 +}

is reducing while

Pb^{4 +}

is oxidising

Q57Single correctHydrocarbons

Predict the correct intermediate and product in the following reaction:

H_{3} C - C \equiv CH H_{2} O, H_{2} SO_{4} HgSO_{4} intermediate (A) ⟶ product (B)

(1)

A is H3C-C(=CH2) with SO4 attached below the middle carbon; B is H3C-C(=O)-CH3.

(2)

A is H3C-C(=CH2) with OH below the middle carbon; B is H3C-C(=CH2) with SO4 below the middle carbon.

(3)

(4)

A is H3C-C(=CH2) with OH below the middle carbon (the enol); B is H3C-C(=O)-CH3 (acetone).

Q58Single correctChemical Kinetics

Which one of the following statements is not correct?

(1)

Catalyst does not initiate any reaction.

(2)

The value of equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium.

(3)

Enzymes catalyse mainly bio-chemical reactions.

(4)

Coenzymes increase the catalytic activity of enzyme.

Q59Single correctStructure of Atom

Which one is the wrong statement?

(1)

de Broglie's wavelength is given by

λ = \frac{h}{m v}

, where m = mass of the particle, v = group velocity of the particle.

(2)

The uncertainty principle is

Δ E \times Δ t \geq \frac{h}{4 π}

(3)

Half filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement.

(4)

The energy of

2 s

orbital is less than the energy of

2 p

orbital in case of Hydrogen like atoms.

Q60Single correctThermodynamics

A gas is allowed to expand in a well insulated container against a constant external pressure of

2.5 atm

from an initial volume of

2.50 L

to a final volume of

4.50 L

. The change in internal energy

Δ U

of the gas in joules will be:

(1)

1136.25 J

(2)

- 500 J

(3)

- 505 J

(4)

+ 505 J

Q61Single correctAldehydes, Ketones and Carboxylic Acids

Consider the reactions given in the diagram and identify A, X, Y and Z:

X, of formula C2H6O, is heated with copper at 573 K to give A. A treated with [Ag(NH3)2]+ and -OH under heat gives a silver mirror. A treated with -OH and heat gives Y. A treated with NH2-NH-CO-NH2 gives Z.

(1)

A-Methoxymethane, X-Ethanoic acid, Y-Acetate ion, Z-Hydrazine.

(2)

A-Methoxymethane, X-Ethanol, Y-Ethanoic acid, Z-Semicarbazide.

(3)

A-Ethanal, X-Ethanol, Y-But-2-enal, Z-Semicarbazone.

(4)

A-Ethanol, X-Acetaldehyde, Y-Butanone, Z-Hydrazone.

Q62Single correctHydrocarbons

Which one is the correct order of acidity?

(1)

CH_{2} = CH_{2} > CH_{3} - CH = CH_{2} > CH_{3} - C \equiv CH > CH \equiv CH

(2)

CH \equiv CH > CH_{3} - C \equiv CH > CH_{2} = CH_{2} > CH_{3} - CH_{3}

(3)

CH \equiv CH > CH_{2} = CH_{2} > CH_{3} - C \equiv CH > CH_{3} - CH_{3}

(4)

CH_{3} - CH_{3} > CH_{2} = CH_{2} > CH_{3} - C \equiv CH > CH \equiv CH

Q63Single correctElectrochemistry

In the electrochemical cell:

Zn ∣ ZnSO_{4} (0.01 M) ∥ CuSO_{4} (1.0 M) ∣ Cu

, the emf of this Daniell cell is

E_{1}

. When the concentration of

ZnSO_{4}

is changed to

1.0 M

and that of

CuSO_{4}

changed to

0.01 M

, the emf changes to

E_{2}

. From the following, which one is the relationship between

E_{1}

and

E_{2}

? (Given,

\frac{RT}{F} = 0.059

)

(1)

E_{1} = E_{2}

(2)

E_{1} < E_{2}

(3)

E_{1} > E_{2}

(4)

E_{2} = 0 \neq = E_{1}

Q64Single correctAmines

The correct increasing order of basic strength for the following compounds is:

Three structures: (I) aniline, a benzene ring with an inner circle bearing NH2; (II) the same ring with NH2 at the top and NO2 at the para position; (III) the same ring with NH2 at the top and CH3 at the para position.

(1)

II < III < I

(2)

III < I < II

(3)

III < II < I

(4)

II < I < III

Q65Single correctThe p-Block Elements

In which pair of ions both the species contain

S - S

bond?

(1)

S_{2} O_{7}^{2 -}, S_{2} O_{3}^{2 -}

(2)

S_{4} O_{6}^{2 -}, S_{2} O_{3}^{2 -}

(3)

S_{2} O_{7}^{2 -}, S_{2} O_{8}^{2 -}

(4)

S_{4} O_{6}^{2 -}, S_{2} O_{7}^{2 -}

Q66Single correctCoordination Compounds

The correct order of the stoichiometries of

AgCl

formed when

AgNO_{3}

in excess is treated with the complexes:

CoCl_{3} 6 NH_{3}

CoCl_{3} 5 NH_{3}

CoCl_{3} 4 NH_{3}

respectively is:

(1)

1 AgCl 3 AgCl 2 AgCl

(2)

3 AgCl 1 AgCl 2 AgCl

(3)

3 AgCl 2 AgCl 1 AgCl

(4)

2 AgCl 3 AgCl 1 AgCl

Q67Single correctThe p-Block Elements

Match the interhalogen compounds of column I with the geometry in column II and assign the correct code.

Column I	Column II
a. $XX^{'}$	i. T-shape
b. $XX_{3}^{'}$	ii. Pentagonal bipyramidal
c. $XX_{5}^{'}$	iii. Linear
d. $XX_{7}^{'}$	iv. Square-pyramidal
	v. Tetrahedral

(1)

(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

(2)

(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

(3)

(a)-(v), (b)-(iv), (c)-(iii), (d)-(ii)

(4)

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

Q68Single correctThe d- and f-Block Elements

The reason for greater range of oxidation states in actinoids is attributed to:

(1)

the radioactive nature of actinoids

(2)

actinoid contraction

(3)

5 f

6 d

and

7 s

levels having comparable energies

(4)

4 f

and

5 d

levels being close in energies

Q69Single correctEquilibrium

A 20 litre container at 400 K contains

CO_{2} (g)

at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of

CO_{2}

attains its maximum value, will be:
(Given that :

SrCO_{3} (s) ⇌ SrO(s) + CO_{2} (g)

K_{P} = 1.6 atm

)

(1)

5 litre

(2)

10 litre

(3)

4 litre

(4)

2 litre

Q70Single correctOrganic Chemistry - Some Basic Principles and Techniques

The

correct

statement regarding electrophile is:

(1)

Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile

(2)

Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile

(3)

Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile

(4)

Electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile

Q71Single correctp-Block Elements

Which of the following is a sink for CO?

(1)

Haemoglobin

(2)

Micro organisms present in the soil

(3)

Oceans

(4)

Plants

Q72Single correctClassification of Elements and Periodicity in Properties

The element Z = 114 has been discovered recently. It will belong to which of the following family/ group and electronic configuration?

(1)

Halogen family,

[Rn] 5 f^{14} 6 d^{10} 7 s^{2} 7 p^{5}

(2)

Carbon family,

[Rn] 5 f^{14} 6 d^{10} 7 s^{2} 7 p^{2}

(3)

Oxygen family,

[Rn] 5 f^{14} 6 d^{10} 7 s^{2} 7 p^{4}

(4)

Nitrogen family,

[Rn] 5 f^{14} 6 d^{10} 7 s^{2} 7 p^{6}

Q73Single correctCoordination Compounds

Correct increasing order for the wavelengths of absorption in the visible region for the complexes of

Co^{3 +}

is:

(1)

[Co(en)_{3}]^{3 +}, [Co(NH_{3})_{6}]^{3 +}, [Co(H_{2} O)_{6}]^{3 +}

(2)

[Co(H_{2} O)_{6}]^{3 +}, [Co(en)_{3}]^{3 +}, [Co(NH_{3})_{6}]^{3 +}

(3)

[Co(H_{2} O)_{6}]^{3 +}, [Co(NH_{3})_{6}]^{3 +}, [Co(en)_{3}]^{3 +}

(4)

[Co(NH_{3})_{6}]^{3 +}, [Co(en)_{3}]^{3 +}, [Co(H_{2} O)_{6}]^{3 +}

Q74Single correctBiomolecules

Which of the following statements is not correct?

(1)

Insulin maintains sugar level in the blood of a human body.

(2)

Ovalbumin is a simple food reserve in egg - white.

(3)

Blood proteins thrombin and fibrinogen are involved in blood clotting.

(4)

Denaturation makes the proteins more active.

Q75Single correctCoordination Compounds

An example of a sigma bonded organometallic compound is

(1)

Ruthenocene

(2)

Grignard's reagent

(3)

Ferrocene

(4)

Cobaltocene

Q76Single correctSolutions

Which of the following is dependent on temperature?

(1)

Molality

(2)

Molarity

(3)

Mole fraction

(4)

Weight percentage

Q77Single correctThermodynamics

For a given reaction,

Δ H = 35.5 kJ mol^{- 1}

and

Δ S = 83.6 J K^{- 1} mol^{- 1}

. The reaction is spontaneous at: (Assume that

Δ H

and

Δ S

do not vary with temperature)

(1)

T < 425 K

(2)

T > 425 K

(3)

all temperatures

(4)

T > 298 K

Q78Single correctOrganic Chemistry - Some Basic Principles and Techniques

The most suitable method of separation of

1 : 1

mixture of ortho and para - nitrophenols is:

(1)

Sublimation

(2)

Chromatography

(3)

Crystallisation

(4)

Steam distillation

Q79Single correctChemical Bonding and Molecular Structure

Which one of the following pairs of species have the same bond order?

(1)

CO, NO

(2)

O_{2}, NO^{+}

(3)

CN^{-}, CO

(4)

N_{2}, O_{2}^{-}

Q80Single correctHaloarenes and Amines

Identify A and predict the type of reaction.

A benzene ring drawn in Kekule form carrying OCH3 on the top carbon and Br on the meta carbon, reacting with NaNH2 to give A.

(1)

Benzene ring with OCH3 on the top carbon and NH2 on the meta carbon.

and substitution reaction

(2)

Benzene ring with OCH3 on the top carbon and NH2 on the ortho carbon.

and elimination addition reaction

(3)

Benzene ring with OCH3 on the top carbon and Br on the ortho carbon.

and cine substitution reaction

(4)

Benzene ring carrying only OCH3 (anisole).

and cine substitution reaction

Q81Single correctChemical Kinetics

A first order reaction has a specific reaction rate of

1 0^{- 2} sec^{- 1}

. How much time will it take for 20 g of the reactant to reduce to 5 g?

(1)

238.6 sec

(2)

138.6 sec

(3)

346.5 sec

(4)

693.0 sec

Q82Single correctRedox Reactions and p-Block Elements

Name the gas that can readily decolourise acidified

KMnO_{4}

solution:

(1)

CO_{2}

(2)

SO_{2}

(3)

NO_{2}

(4)

P_{2} O_{5}

Q83Single correctAlcohols, Phenols and Ethers

The heating of phenyl-methyl ethers with HI produces.

(1)

ethyl chlorides

(2)

iodobenzene

(3)

phenol

(4)

benzene

Q84Single correctCoordination Compounds

Pick out the correct statement with respect to

[Mn(CN)_{6}]^{3 -}

(1)

It is

s p^{3} d^{2}

hybridised and octahedral

(2)

It is

s p^{3} d^{2}

hybridised and tetrahedral

(3)

It is

d^{2} s p^{3}

hybridised and octahedral

(4)

It is

dsp^{2}

hybridised and square planar

Q85Single correctThe s-Block Elements

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

(1)

(2)

(3)

(4)

Q86Single correctEquilibrium

The equilibrium constants of the following are:

N_{2} + 3 H_{2} ⇌ 2 NH_{3} K_{1}

N_{2} + O_{2} ⇌ 2 NO K_{2}

H_{2} + \frac{1}{2} O_{2} ⇌ H_{2} O K_{3}

The equilibrium constant (K) of the reaction:

2 NH_{3} + \frac{5}{2} O_{2} K 2 NO + 3 H_{2} O

, will be:

(1)

K_{1} K_{3}^{3} / K_{2}

(2)

K_{2} K_{3}^{3} / K_{1}

(3)

K_{2} K_{3} / K_{1}

(4)

K_{2}^{3} K_{3} / K_{1}

Q87Single correctAmines

Which of the following reactions is appropriate for converting acetamide to methanamine?

(1)

Carbylamine reaction

(2)

Hoffmann hypobromamide reaction

(3)

Stephens reaction

(4)

Gabriels phthalimide synthesis

Q88Single correctChemical Kinetics

Mechanism of a hypothetical reaction

X_{2} + Y_{2} \to 2 XY

is given below
(i)

X_{2} \to X + X

(fast)
(ii)

X + Y_{2} ⇌ XY + Y

(slow)
(iii)

X + Y \to XY

(fast)
The overall order of the reaction will be

(1)

1

(2)

2

(3)

0

(4)

1.5

Q89Single correctAldehydes, Ketones and Carboxylic Acids

The IUPAC name of the compound shown is:

A six-carbon chain drawn skeletally: an aldehyde H-C=O at the left, a methyl group hanging below the second carbon, a C=O above the third carbon, and a carbon-carbon double bond between the fourth and fifth carbons running to a terminal methyl.

(1)

3-keto-2-methylhex-4-enal

(2)

5-formylhex-2-en-3-one

(3)

5-methyl-4-oxohex-2-en-5-al

(4)

3-keto-2-methylhex-5-enal

Q90Single correctGeneral Principles and Processes of Isolation of Elements

Extraction of gold and silver involves leaching with

CN^{-}

ion. Silver is later recovered by:

(1)

liquation

(2)

distillation

(3)

zone refining

(4)

displacement with Zn

Biology90 questions

Q91Single correctSexual Reproduction in Flowering Plants

Double fertilization is exhibited by

(1)

Gymnosperms

(2)

Algae

(3)

Fungi

(4)

Angiosperms

Q92Single correctBiological Classification

Which of the following are found in extreme saline conditions ?

(1)

Archaebacteria

(2)

Eubacteria

(3)

Cyanobacteria

(4)

Mycobacteria

Q93Single correctMineral Nutrition / Biological Classification

Select the mismatch :

(1)

Frankia — Alnus

(2)

Rhodospirillum — Mycorrhiza

(3)

Anabaena — Nitrogen fixer

(4)

Rhizobium — Alfalfa

Q94Single correctBiotechnology - Principles and Processes

What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis ?

(1)

The larger the fragment size, the farther it moves

(2)

The smaller the fragment size, the farther it moves

(3)

Positively charged fragments move to farther end

(4)

Negatively charged fragments do not move

Q95Single correctSexual Reproduction in Flowering Plants

Attractants and rewards are required for :

(1)

Anemophily

(2)

Entomophily

(3)

Hydrophily

(4)

Cleistogamy

Q96Single correctAnatomy of Flowering Plants

Which of the following is made up of dead cells ?

(1)

Xylem parenchyma

(2)

Collenchyma

(3)

Phellem

(4)

Phloem

Q97Single correctDigestion and Absorption

Which cells of 'Crypts of Lieberkuhn' secrete antibacterial lysozyme ?

(1)

Argentaffin cells

(2)

Paneth cells

(3)

Zymogen cells

(4)

Kupffer cells

Q98Single correctBody Fluids and Circulation

Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature ?
(a) They do not need to reproduce
(b) They are somatic cells
(c) They do not metabolize
(d) All their internal space is available for oxygen transport

(1)

Only (d)

(2)

Only (a)

(3)

(a), (c) and (d)

(4)

(b) and (c)

Q99Single correctBody Fluids and Circulation

The hepatic portal vein drains blood to liver from

(1)

Heart

(2)

Stomach

(3)

Kidneys

(4)

Intestine

Q100Single correctMolecular Basis of Inheritance

The final proof for DNA as the genetic material came from the experiments of :

(1)

Griffith

(2)

Hershey and Chase

(3)

Avery, Mcleod and McCarty

(4)

Hargobind Khorana

Q101Single correctBiological Classification

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen ?

(1)

Bacillus

(2)

Pseudomonas

(3)

Mycoplasma

(4)

Nostoc

Q102Single correctCell Cycle and Cell Division

Which of the following options gives the correct sequence of events during mitosis ?

(1)

condensation

\to

nuclear membrane disassembly

\to

crossing over

\to

segregation

\to

telophase

(2)

condensation

\to

nuclear membrane disassembly

\to

arrangement at equator

\to

centromere division

\to

segregation

\to

telophase

(3)

condensation

\to

crossing over

\to

nuclear membrane disassembly

\to

segregation

\to

telophase

(4)

condensation

\to

arrangement at equator

\to

centromere division

\to

segregation

\to

telophase

Q103Single correctBiomolecules

Which one of the following statements is correct with reference to enzymes ?

(1)

Apoenzyme = Holoenzyme + Coenzyme

(2)

Holoenzyme = Apoenzyme + Coenzyme

(3)

Coenzyme = Apoenzyme + Holoenzyme

(4)

Holoenzyme = Coenzyme + Co-factor

Q104Single correctMolecular Basis of Inheritance

During DNA replication, Okazaki fragments are used to elongate :

(1)

The leading strand towards replication fork.

(2)

The lagging strand towards replication fork.

(3)

The leading strand away from replication fork.

(4)

The lagging strand away from the replication fork.

Q105Single correctBiomolecules

Which of the following are not polymeric ?

(1)

Nucleic acids

(2)

Proteins

(3)

Polysaccharides

(4)

Lipids

Q106Single correctEnvironmental Issues / Biodiversity and Conservation

The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as :

(1)

Core zone

(2)

Buffer zone

(3)

Transition zone

(4)

Restoration zone

Q107Single correctSexual Reproduction in Flowering Plants

A dioecious flowering plant prevents both :

(1)

Autogamy and xenogamy

(2)

Autogamy and geitonogamy

(3)

Geitonogamy and xenogamy

(4)

Cleistogamy and xenogamy

Q108Single correctChemical Coordination and Integration

A temporary endocrine gland in the human body is :

(1)

Pineal gland

(2)

Corpus cardiacum

(3)

Corpus luteum

(4)

Corpus allatum

Q109Single correctHuman Health and Disease

Match the following sexually transmitted diseases (Column-I) with their causative agents (Column-II) and select the correct option.

Column-I	Column-II
a. Gonorrhea	i. HIV
b. Syphilis	ii. Neisseria
c. Genital Warts	iii. Treponema
d. AIDS	iv. Human Papilloma - Virus

(1)

(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

(2)

(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

(3)

(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

(4)

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

Q110Single correctHuman Health and Disease

Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune-response is responsible for such rejections ?

(1)

Autoimmune response

(2)

Cell-mediated immune response

(3)

Hormonal immune response

(4)

Physiological immune response

Q111Single correctMolecular Basis of Inheritance

Spliceosomes are not found in cells of :

(1)

Plants

(2)

Fungi

(3)

Animals

(4)

Bacteria

Q112Single correctBiological Classification

An example of colonial alga is :

(1)

Chlorella

(2)

Volvox

(3)

Ulothrix

(4)

Spirogyra

Q113Single correctAnimal Kingdom / Evolution

Which of the following represents order of 'Horse' ?

(1)

Equidae

(2)

Perissodactyla

(3)

Caballus

(4)

Ferus

Q114Single correctCell Structure and Function

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP ?

(1)

Lysosome

(2)

Ribosome

(3)

Chloroplast

(4)

Mitochondrion

Q115Single correctBiotechnology and its Applications

The process of separation and purification of expressed protein before marketing is called :

(1)

Upstream processing

(2)

Downstream processing

(3)

Bioprocessing

(4)

Postproduction processing

Q116Single correctEcosystem

Mycorrhizae are the example of :

(1)

Fungistasis

(2)

Amensalism

(3)

Antibiosis

(4)

Mutualism

Q117Single correctBiological Classification

Viroids differ from viruses in having :

(1)

DNA molecules with protein coat

(2)

DNA molecules without protein coat

(3)

RNA molecules with protein coat

(4)

RNA molecules without protein coat

Q118Single correctAnatomy of Flowering Plants

Root hairs develop from the region of :

(1)

Maturation

(2)

Elongation

(3)

Root cap

(4)

Meristematic activity

Q119Single correctSexual Reproduction in Flowering Plants

Coconut fruit is a :

(1)

Drupe

(2)

Berry

(3)

Nut

(4)

Capsule

Q120Single correctPlant Kingdom

Plants which produce characteristic pneumatophores and show vivipary belong to :

(1)

Mesophytes

(2)

Halophytes

(3)

Psammophytes

(4)

Hydrophytes

Q121Single correctBiodiversity and Conservation

Which one of the following is related to Ex-situ conservation of threatened animals and plants ?

(1)

Wildlife Safari parks

(2)

Biodiversity hot spots

(3)

Amazon rainforest

(4)

Himalayan region

Q122Single correctPlant Kingdom

Select the mismatch :

(1)

P in u s

— Dioecious

(2)

C yc a s

— Dioecious

(3)

S a l v inia

— Heterosporous

(4)

Eq u i se t u m

— Homosporous

Q123Single correctPlant Physiology

Which of the following facilitates opening of stomatal aperture ?

(1)

Contraction of outer wall of guard cells

(2)

Decrease in turgidity of guard cells

(3)

Radial orientation of cellulose microfibrils in the cell wall of guard cells

(4)

Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells

Q124Single correctMolecular Basis of Inheritance

The association of histone H1 with a nucleosome indicates :

(1)

Transcription is occurring.

(2)

DNA replication is occurring.

(3)

The DNA is condensed into a Chromatin Fibre.

(4)

The DNA double helix is exposed.

Q125Single correctMolecular Basis of Inheritance

DNA fragments are :

(1)

Positively charged

(2)

Negatively charged

(3)

Neutral

(4)

Either positively or negatively charged depending on their size

Q126Single correctHuman Reproduction

Capacitation occurs in :

(1)

Rete testis

(2)

Epididymis

(3)

Vas deferens

(4)

Female Reproductive tract

Q127Single correctEcosystem

Which ecosystem has the maximum biomass ?

(1)

Forest ecosystem

(2)

Grassland ecosystem

(3)

Pond ecosystem

(4)

Lake ecosystem

Q128Single correctPrinciples of Inheritance and Variation

A disease caused by an autosomal primary non-disjunction is :

(1)

Down's Syndrome

(2)

Klinefelter's Syndrome

(3)

Turner's Syndrome

(4)

Sickle Cell Anemia

Q129Single correctPlant Kingdom

Life cycle of

E c t oc a r p u s

and

F u c u s

respectively are :

(1)

Haplontic, Diplontic

(2)

Diplontic, Haplodiplontic

(3)

Haplodiplontic, Diplontic

(4)

Haplodiplontic, Haplontic

Q130Single correctMolecular Basis of Inheritance

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered ?

(1)

(2)

(3)

(4)

333

Q131Single correctLocomotion and Movement

The pivot joint between atlas and axis is a type of :

(1)

fibrous joint

(2)

cartilaginous joint

(3)

synovial joint

(4)

saddle joint

Q132Single correctBiotechnology - Principles and Processes

A gene whose expression helps to identify the transformed cell is known as :

(1)

Selectable marker

(2)

Vector

(3)

Plasmid

(4)

Structural gene

Q133Single correctEcosystem

Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :

(1)

Tropical Savannah

(2)

Tropical Rain Forest

(3)

Grassland

(4)

Temperate Forest

Q134Single correctPrinciples of Inheritance and Variation

The genotypes of a Husband and Wife are

I^{A} I^{B}

and

I^{A} i

.
Among the blood types of their children, how many different genotypes and phenotypes are possible ?

(1)

3 genotypes ; 3 phenotypes

(2)

3 genotypes ; 4 phenotypes

(3)

4 genotypes ; 3 phenotypes

(4)

4 genotypes ; 4 phenotypes

Q135Single correctPlant Kingdom

Zygotic meiosis is characteristic of :

(1)

M a rc han t ia

(2)

F u c u s

(3)

F u na r ia

(4)

C h l am y d o m o na s

Q136Single correctMicrobes in Human Welfare

Which of the following is

correc tl y

matched for the product produced by them ?

(1)

Acetobacter\ aceti : Antibiotics

(2)

M e t han o ba c t er i u m

: Lactic acid

(3)

Penicillium\ notatum : Acetic acid

(4)

Saccharomyces\ cerevisiae : Ethanol

Q137Single correctBody Fluids and Circulation

Frog's heart when taken out of the body continues to beat for sometime.
Select the best option from the following statements.
(a) Frog is a poikilotherm.
(b) Frog does not have any coronary circulation.
(c) Heart is "myogenic" in nature.
(d) Heart is autoexcitable.
Options :

(1)

Only (c)

(2)

Only (d)

(3)

(a) and (b)

(4)

Q138Single correctRespiration and Cellular Respiration

Which statement is

w ro n g

for Krebs' cycle ?

(1)

There are three points in the cycle where

NAD^{+}

is reduced to

NADH + H^{+}

(2)

There is one point in the cycle where

FAD^{+}

is reduced to

FADH_{2}

(3)

During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised

(4)

The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid

Q139Single correctAnimal Kingdom

In case of poriferans, the spongocoel is lined with flagellated cells called

(1)

ostia

(2)

oscula

(3)

choanocytes

(4)

mesenchymal cells

Q140Single correctMolecular Basis of Inheritance

Which of the following RNAs should be most abundant in animal cell ?

(1)

r-RNA

(2)

t-RNA

(3)

m-RNA

(4)

mi-RNA

Q141Single correctAnimal Kingdom

Which among these is the

correc t

combination of aquatic mammals ?

(1)

Seals, Dolphins, Sharks

(2)

Dolphins, Seals,

T ry g o n

(3)

Whales, Dolphins, Seals

(4)

T ry g o n

, Whales, Seals

Q142Single correctPhotosynthesis in Higher Plants

With reference to factors affecting the rate of photosynthesis, which of the following statement is not correct ?

(1)

Light saturation for

CO_{2}

fixation occurs at 10% of full sunlight

(2)

Increasing atmospheric

CO_{2}

concentration up to 0.05% can enhance

CO_{2}

fixation rate

(3)

C_{3}

plants respond to higher temperatures with enhanced photosynthesis while

C_{4}

plants have much lower temperature optimum

(4)

Tomato is a greenhouse crop which can be grown in

CO_{2}

- enriched atmosphere for higher yield

Q143Single correctOrganisms and Populations

Asymptote in a logistic growth curve is obtained when :

(1)

The value of 'r' approaches zero

(2)

K = N

(3)

K > N

(4)

K < N

Q144Single correctLocomotion and Movement

Out of 'X' pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation.

(1)

X = 12, Y = 7

— True ribs are attached dorsally to vertebral column and ventrally to the sternum

(2)

X = 12, Y = 5

— True ribs are attached dorsally to vertebral column and sternum on the two ends

(3)

X = 24, Y = 7

— True ribs are dorsally attached to vertebral column but are free on ventral side.

(4)

X = 24, Y = 12

— True ribs are dorsally attached to vertebral column but are free on ventral side.

Q145Single correctBiotechnology - Principles and Processes

The DNA fragments separated on an agarose gel can be visualised after staining with :

(1)

Bromophenol blue

(2)

Acetocarmine

(3)

Aniline blue

(4)

Ethidium bromide

Q146Single correctSexual Reproduction in Flowering Plants

Functional megaspore in an angiosperm develops into :

(1)

Ovule

(2)

Endosperm

(3)

Embryo sac

(4)

Embryo

Q147Single correctPrinciples of Inheritance and Variation

Among the following characters, which one was not considered by Mendel in his experiments on pea ?

(1)

Stem - Tall or Dwarf

(2)

Trichomes - Glandular or non-glandular

(3)

Seed - Green or Yellow

(4)

Pod - Inflated or Constricted

Q148Single correctBreathing and Exchange of Gases

Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of :

(1)

Residual Volume

(2)

Inspiratory Reserve Volume

(3)

Tidal Volume

(4)

Expiratory Reserve Volume

Q149Single correctChemical Coordination and Integration

GnRH, a hypothalamic hormone, needed in reproduction, acts on

(1)

anterior pituitary gland and stimulates secretion of LH and oxytocin

(2)

anterior pituitary gland and stimulates secretion of LH and FSH.

(3)

posterior pituitary gland and stimulates secretion of oxytocin and FSH.

(4)

posterior pituitary gland and stimulates secretion of LH and relaxin.

Q150Single correctMorphology of Flowering Plants

In Bougainvillea thorns are the modifications of :

(1)

Stipules

(2)

Adventitious root

(3)

Stem

(4)

Leaf

Q151Single correctPrinciples of Inheritance and Variation

Which one from those given below is the period for Mendel's hybridization experiments ?

(1)

1856 - 1863

(2)

1840 - 1850

(3)

1857 - 1869

(4)

1870 - 1877

Q152Single correctNeural Control and Coordination

Good vision depends on adequate intake of carotene-rich food.
Select the best option from the following statements.
(a) Vitamin A derivatives are formed from carotene.
(b) The photopigments are embedded in the membrane discs of the inner segment.
(c) Retinal is a derivative of Vitamin A.
(d) Retinal is a light absorbing part of all the visual photopigments.
Options :

(1)

(a) and (b)

(2)

(a), (c) and (d)

(3)

(a) and (c)

(4)

(b), (c) and (d)

Q153Single correctMicrobes in Human Welfare

Which one of the following statements is not valid for aerosols ?

(1)

They are harmful to human health

(2)

They alter rainfall and monsoon patterns

(3)

They cause increased agricultural productivity

(4)

They have negative impact on agricultural land

Q154Single correctExcretory Products and their Elimination

A decrease in blood pressure/volume will not cause the release of :

(1)

Renin

(2)

Atrial Natriuretic Factor

(3)

Aldosterone

(4)

ADH

Q155Single correctStrategies for Enhancement in Food Production

Homozygous purelines in cattle can be obtained by :

(1)

mating of related individuals of same breed.

(2)

mating of unrelated individuals of same breed.

(3)

mating of individuals of different breed.

(4)

mating of individuals of different species.

Q156Single correctAnatomy of Flowering Plants

The vascular cambium normally gives rise to :

(1)

Phelloderm

(2)

Primary phloem

(3)

Secondary xylem

(4)

Periderm

Q157Single correctExcretory Products and their Elimination

Which of the following statements is correct ?

(1)

The ascending limb of loop of Henle is impermeable to water.

(2)

The descending limb of loop of Henle is impermeable to water.

(3)

The ascending limb of loop of Henle is permeable to water.

(4)

The descending limb of loop of Henle is permeable to electrolytes.

Q158Single correctPlant Growth and Development

Fruit and leaf drop at early stages can be prevented by the application of :

(1)

Cytokinins

(2)

Ethylene

(3)

Auxins

(4)

Gibberellic acid

Q159Single correctAnimal Kingdom

A baby boy aged two years is admitted to play school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?

(1)

Incisors

(2)

Canines

(3)

Pre-molars

(4)

Molars

Q160Single correctAnimal Kingdom

An important characteristic that Hemichordates share with Chordates is :

(1)

absence of notochord

(2)

ventral tubular nerve cord

(3)

pharynx with gill slits

(4)

pharynx without gill slits

Q161Single correctEvolution

Artificial selection to obtain cows yielding higher milk output represents :

(1)

stabilizing selection as it stabilizes this character in the population

(2)

directional as it pushes the mean of the character in one direction

(3)

disruptive as it splits the population into two, one yielding higher output and the other lower output.

(4)

stabilizing followed by disruptive as it stabilizes the population to produce higher yielding cows.

Q162Single correctHuman Reproduction

Select the correct route for the passage of sperms in male frogs :

(1)

Testes

\to

Bidder's canal

\to

Kidney

\to

Vasa efferentia

\to

Urinogenital duct

\to

Cloaca

(2)

Testes

\to

Vasa efferentia

\to

Kidney

\to

Seminal Vesicle

\to

Urinogenital duct

\to

Cloaca

(3)

Testes

\to

Vasa efferentia

\to

Bidder's canal

\to

Ureter

\to

Cloaca

(4)

Testes

\to

Vasa efferentia

\to

Kidney

\to

Bidder's canal

\to

Urinogenital duct

\to

Cloaca

Q163Single correctDigestion and Absorption

Which of the following options best represents the enzyme composition of pancreatic juice?

(1)

amylase, peptidase, trypsinogen, rennin

(2)

amylase, pepsin, trypsinogen, maltase

(3)

peptidase, amylase, pepsin, rennin

(4)

lipase, amylase, trypsinogen, procarboxypeptidase

Q164Single correctPhotosynthesis in Higher Plants

Phosphoenol pyruvate (PEP) is the primary

CO_{2}

acceptor in

(1)

C_{3}

plants

(2)

C_{4}

plants

(3)

C_{2}

plants

(4)

C_{3}

and

C_{4}

plants

Q165Single correctMorphology of Flowering Plants

The morphological nature of the edible part of coconut is :

(1)

Perisperm

(2)

Cotyledon

(3)

Endosperm

(4)

Pericarp

Q166Single correctCell Cycle and Cell Division

Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur ?

(1)

Chromosomes will not condense

(2)

Chromosomes will be fragmented

(3)

Chromosomes will not segregate

(4)

Recombination of chromosome arms will occur

Q167Single correctBody Fluids and Circulation

MALT constitutes about ________ percent of the lymphoid tissue in human body.

(1)

50%

(2)

20%

(3)

70%

(4)

10%

Q168Single correctNeural Control and Coordination

Receptor sites for neurotransmitters are present on :

(1)

membranes of synaptic vesicles

(2)

pre-synaptic membrane

(3)

tips of axons

(4)

post-synaptic membrane

Q169Single correctChemical Coordination and Integration

Hypersecretion of Growth Hormone in adults does not cause further increase in height, because

(1)

Growth Hormone becomes inactive in adults.

(2)

Epiphyseal plates close after adolescence.

(3)

Bones loose their sensitivity to Growth Hormone in adults.

(4)

Muscle fibres do not grow in size after birth.

Q170Single correctOrganisms and Populations

Alexander Von Humboldt described for the first time :

(1)

Ecological Biodiversity

(2)

Laws of limiting factor

(3)

Species area relationships

(4)

Population Growth equation

Q171Single correctNeural Control and Coordination

Myelin sheath is produced by :

(1)

Schwann Cells and Oligodendrocytes

(2)

Astrocytes and Schwann Cells

(3)

Oligodendrocytes and Osteoclasts

(4)

Osteoclasts and Astrocytes

Q172Single correctReproductive Health

In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilisation ?

(1)

Intrauterine transfer

(2)

Gamete intracytoplasmic fallopian transfer

(3)

Artificial Insemination

(4)

Intracytoplasmic sperm injection

Q173Single correctCell - The Unit of Life

Which of the following components provides sticky character to the bacterial cell ?

(1)

Cell wall

(2)

Nuclear membrane

(3)

Plasma membrane

(4)

Glycocalyx

Q174Single correctMolecular Basis of Inheritance

DNA replication in bacteria occurs :

(1)

During S phase

(2)

Within nucleolus

(3)

Prior to fission

(4)

Just before transcription

Q175Single correctReproductive Health

The function of copper ions in copper releasing IUD's is :

(1)

They suppress sperm motility and fertilizing capacity of sperms.

(2)

They inhibit gametogenesis.

(3)

They make uterus unsuitable for implantation.

(4)

They inhibit ovulation.

Q176Single correctMicrobes in Human Welfare

Which of the following in sewage treatment removes suspended solids ?

(1)

Tertiary treatment

(2)

Secondary treatment

(3)

Primary treatment

(4)

Sludge treatment

Q177Single correctTransport in Plants

The water potential of pure water is :

(1)

Zero

(2)

Less than zero

(3)

More than zero but less than one

(4)

More than one

Q178Single correctAnatomy of Flowering Plants

Identify the wrong statement in context of heartwood :

(1)

Organic compounds are deposited in it

(2)

It is highly durable

(3)

It conducts water and minerals efficiently

(4)

It comprises dead elements with highly lignified walls.

Q179Single correctMolecular Basis of Inheritance

Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.

(1)

Both are due to a qualitative defect in globin chain synthesis.

(2)

Both are due to a quantitative defect in globin chain synthesis.

(3)

Thalassemia is due to less synthesis of globin molecules.

(4)

Sickle cell anemia is due to a quantitative problem of globin molecules.

Q180Single correctSexual Reproduction in Flowering Plants

Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by :

(1)

Water

(2)

Bee

(3)

Wind

(4)

Bat

Frequently Asked Questions

How many questions are in the NEET 2017 May 07 paper?

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