NEET 2016 (Phase 1)

If the velocity of a particle is v = At + Bt2, where A and B are constants, then the distance travelled by it between 1 s and 2 s is

1. 32A + 73B
2. A2 + B3
3. 32A + 4B
4. 3A + 7B

If the magnitude of sum of two vectors is equal to the magnitude of difference of the two vectors, the angle between these vectors is

1. 45
2. 180
3. 0
4. 90

A particle moves so that its position vector is given by r = t x + t y, where is a constant. Which of the following is true?

1. Velocity is perpendicular to r and acceleration is directed towards the origin.
2. Velocity is perpendicular to r and acceleration is directed away from the origin.
3. Velocity and acceleration both are perpendicular to r
4. Velocity and acceleration both are parallel to r

A car is negotiating a curved road of radius R. The road is banked at an angle . The coefficient of friction between the tyres of the car and the road is s. The maximum safe velocity on this road is

1. gR s + 1 - s
2. gR2 s + 1 - s
3. gR2 s + 1 - s
4. gR s + 1 - s

A particle of mass 10 g moves along a circle of radius 6.4 cm with a constant tangential acceleration. What is the magnitude of this acceleration if the kinetic energy of the particle becomes equal to 8 10-4 J by the end of the second revolution after the beginning of the motion?

1. 0.18 m/s2
2. 0.2 m/s2
3. 0.1 m/s2
4. 0.15 m/s2

A body of mass 1 kg begins to move under the action of a time dependent force F = (2t i + 3t2 j) N, where i and j are unit vectors along x and y axis. What power will be developed by the force at the time t?

1. (2t3 + 3t4) W
2. (2t3 + 3t5) W
3. (2t2 + 3t3) W
4. (2t2 + 4t4) W

What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?

1. 3gR
2. 5gR
3. gR
4. 2gR

A disc and a sphere of same radius but different masses roll off on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first?

1. Both reach at the same time
2. Depends on their masses
3. Disc
4. Sphere

From a disc of radius R and mass M, a circular hole of diameter R, whose rim passes through the centre is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis, passing through the centre?

1. 11MR232
2. 9MR232
3. 15MR232
4. 13MR232

A uniform circular disc of radius 50 cm at rest is free to turn about an axis which is perpendicular to its plane and passes through its centre. It is subjected to a torque which produces a constant angular acceleration of 2.0 rad s-2. Its net acceleration in m s-2 at the end of 2.0 s is approximately

1. 6.0
2. 3.0
3. 8.0
4. 7.0

At what height from the surface of earth the gravitation potential and the value of g are -5.4 107 J kg-1 and 6.0 m s-2 respectively? Take the radius of earth as 6400 km.

1. 1400 km
2. 2000 km
3. 2600 km
4. 1600 km

The ratio of escape velocity at earth (ve) to the escape velocity at a planet (vp) whose radius and mean density are twice as that of earth is

1. 1 : 4
2. 1 : 2
3. 1 : 2
4. 1 : 2 2

Coefficient of linear expansion of brass and steel rods are 1 and 2. Lengths of brass and steel rods are l1 and l2 respectively. If (l2 - l1) is maintained same at all temperatures, which one of the following relations holds good?

1. 12 l2 = 22 l1
2. 1 l1 = 2 l2
3. 1 l2 = 2 l1
4. 1 l22 = 2 l12

A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h [Latent heat of ice is 3.4 105 J/kg and g = 10 N/kg]

1. 136 km
2. 68 km
3. 34 km
4. 544 km

A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is U1, at wavelength 500 nm is U2 and that at 1000 nm is U3. Wien's constant, b = 2.88 106 nm K. Which of the following is correct?

1. U1 > U2
2. U2 > U1
3. U1 = 0
4. U3 = 0

Two non-mixing liquids of densities and n (n > 1) are put in a container. The height of each liquid is h. A solid cylinder of length L and density d is put in this container. The cylinder floats with its axis vertical and length pL (p < 1) in the denser liquid. The density d is equal to

1. \2 + (n - 1)p\
2. \1 + (n - 1)p\
3. \1 + (n + 1)p\
4. \2 + (n + 1)p\

A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then

1. Compressing the gas isothermally or adiabatically will require the same amount of work.
2. Which of the case (whether compression through isothermal or through adiabatic process) requires more work will depend upon the atomicity of the gas.
3. Compressing the gas isothermally will require more work to be done.
4. Compressing the gas through adiabatic process will require more work to be done.

The molecules of a given mass of a gas have r.m.s. velocity of 200 m s-1 at 27 and 1.0 105 N m-2 pressure. When the temperature and pressure of the gas are respectively, 127 and 0.05 105 N m-2, the r.m.s. velocity of its molecules in m s-1 is

1. 100 23
2. 1003
3. 100 2
4. 400 3

A refrigerator works between 4 and 30 . It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is (Take 1 cal = 4.2 Joules)

1. 236.5 W
2. 2365 W
3. 2.365 W
4. 23.65 W

An air column, closed at one end open at the other, resonates with a tuning fork when the smallest length of the column is 50 cm. The next larger length of the column resonating with the same tuning fork is

1. 150 cm
2. 200 cm
3. 66.7 cm
4. 100 cm

A uniform rope of length L and mass m1 hangs vertically from a rigid support. A block of mass m2 is attached to the free end of the rope. A transverse pulse of wavelength 1 is produced at the lower end of the rope. The wavelength of the pulse when it reaches the top of the rope is 2. The ratio 2/ 1 is

1. m2m1
2. m1 + m2m1
3. m1m2
4. m1 + m2m2

A capacitor of 2 is charged as shown in the diagram. When the switch S is turned to position 2, the percentage of its stored energy dissipated is [figure]

1. 75%
2. 80%
3. 0%
4. 20%

Two identical charged spheres suspended from a common point by two massless strings of lengths l, are initially at a distance d (d l) apart because of their mutual repulsion. The charges begin to leak from both the spheres at a constant rate. As a result, the spheres approach each other with a velocity v. Then v varies as a function of the distance x between the spheres, as

1. v x-1/2
2. v x-1
3. v x1/2
4. v x

A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of emf's is

1. 3 : 4
2. 3 : 2
3. 5 : 1
4. 5 : 4

The charge flowing through a resistance R varies with time t as Q = at - bt2, where a and b are positive constants. The total heat produced in R is

1. a3R2b
2. a3Rb
3. a3R6b
4. a3R3b

A long straight wire of radius a carries a steady current I. The current is uniformly distributed over its cross-section. The ratio of the magnetic fields B and B', at radial distance a2 and 2a respectively, from the axis of the wire is

1. 1
2. 4
3. 14
4. 12

A square loop ABCD carrying a current i, is placed near and coplanar with a long straight conductor XY carrying a current I, the net force on the loop will be [figure]

1. 2 0 IiL3
2. 0 IiL2
3. 2 0 Ii3
4. 0 Ii2

The magnetic susceptibility is negative for

1. ferromagnetic material only
2. paramagnetic and ferromagnetic materials
3. diamagnetic material only
4. paramagnetic material only

An inductor 20 mH, a capacitor 50 and a resistor 40 are connected in series across a source of emf V = 10 340t. The power loss in A.C. circuit is

1. 0.76 W
2. 0.89 W
3. 0.46 W
4. 0.67 W

A small signal voltage V(t) = V0 t is applied across an ideal capacitor C

1. Current I(t) is in phase with voltage V(t).
2. Current I(t) leads voltage V(t) by 180
3. Current I(t) lags voltage V(t) by 90 .
4. Over a full cycle the capacitor C does not consume any energy from the voltage source.

A long solenoid has 1000 turns. When a current of 4 A flows through it, the magnetic flux linked with each turn of the solenoid is 4 10-3 Wb. The self-inductance of the solenoid is

1. 2 H
2. 1 H
3. 4 H
4. 3 H

Out of the following options which one can be used to produce a propagating electromagnetic wave?

1. A chargeless particle
2. An accelerating charge
3. A charge moving at constant velocity
4. A stationary charge

Match the corresponding entries of column 1 with column 2. [Where m is the magnification produced by the mirror]

1. (a)-(p) and (s); (b)-(q) and (r); (c)-(q) and (s); (d)-(q) and (r)
2. (a)-(r) and (s); (b)-(q) and (s); (c)-(q) and (r); (d)-(p) and (s)
3. (a)-(q) and (r); (b)-(q) and (r); (c)-(q) and (s); (d)-(p) and (s)
4. (a)-(p) and (r); (b)-(p) and (s); (c)-(p) and (q); (d)-(r) and (s)

In a diffraction pattern due to a single slit of width a, the first minimum is observed at an angle 30 when light of wavelength 5000 A is incident on the slit. The first secondary maximum is observed at an angle of

1. -1 ( 12 )
2. -1 ( 34 )
3. -1 ( 14 )
4. -1 ( 23 )

The intensity at the maximum in a Young's double slit experiment is I0. Distance between two slits is d = 5 , where is the wavelength of light used in the experiment. What will be the intensity in front of one of the slits on the screen placed at a distance D = 10d?

1. 34I0
2. I02
3. I0
4. I04

An astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively. To view an object 200 cm away from the objective, the lenses must be separated by a distance

1. 50.0 cm
2. 54.0 cm
3. 37.3 cm
4. 46.0 cm

The angle of incidence for a ray of light at a refracting surface of a prism is 45 . The angle of prism is 60 . If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are

1. 45 ; 2
2. 30 ; 1 2
3. 45 ; 1 2
4. 30 ; 2

An electron of mass m and a photon have same energy E. The ratio of de-Broglie wavelengths associated with them is

1. c(2mE) 12
2. 1c ( 2mE ) 12
3. 1c ( E2m ) 12
4. ( E2m ) 12

When a metallic surface is illuminated with radiation of wavelength , the stopping potential is V. If the same surface is illuminated with radiation of wavelength 2 , the stopping potential is V4. The threshold wavelength for the metallic surface is

1. 52
2. 3
3. 4
4. 5

Given the value of Rydberg constant is 107 m-1, the wave number of the last line of the Balmer series in hydrogen spectrum will be

1. 0.25 107 m-1
2. 2.5 107 m-1
3. 0.025 104 m-1
4. 0.5 107 m-1

When an -particle of mass m moving with velocity v bombards on a heavy nucleus of charge Ze, its distance of closest approach from the nucleus depends on m as

1. 1m2
2. m
3. 1m
4. 1 m

To get output 1 for the following circuit, the correct choice for the input is [figure]

1. A = 1, B = 1, C = 0
2. A = 1, B = 0, C = 1
3. A = 0, B = 1, C = 0
4. A = 1, B = 0, C = 0

Consider the junction diode as ideal. The value of current flowing through AB is [figure]

1. 10-1 A
2. 10-3 A
3. 0 A
4. 10-2 A

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15 m s-1. Then, the frequency of sound that the observer hears in the echo reflected from the cliff is (Take velocity of sound in air = 330 m s-1)

1. 838 Hz
2. 885 Hz
3. 765 Hz
4. 800 Hz

A npn transistor is connected in common emitter configuration in a given amplifier. A load resistance of 800 is connected in the collector circuit and the voltage drop across it is 0.8 V. If the current amplification factor is 0.96 and the input resistance of the circuit is 192 , the voltage gain and the power gain of the amplifier will respectively be

1. 4, 4
2. 4, 3.69
3. 4, 3.84
4. 3.69, 3.84

Two electrons occupying the same orbital are distinguished by

1. azimuthal quantum number
2. spin quantum number
3. principal quantum number
4. magnetic quantum number

In which of the following options the order of arrangement does not agree with the variation of property indicated against it ?

1. I < Br < Cl < F (increasing electron gain enthalpy)
2. Li < Na < K < Rb (increasing metallic radius)
3. Al3+ < Mg2+ < Na+ < F- (increasing ionic size)
4. B < C < N < O (increasing first ionisation enthalpy)

Consider the molecules CH4, NH3 and H2O. Which of the given statements is false?

1. The H-O-H bond angle in H2O is smaller than the H-N-H bond angle in NH3.
2. The H-C-H bond angle in CH4 is larger than the H-N-H bond angle in NH3.
3. The H-C-H bond angle in CH4, the H-N-H bond angle in NH3, and the H-O-H bond angle in H2O are all greater than 90 .
4. The H-O-H bond angle in H2O is larger than the H-C-H bond angle in CH4.

Predict the correct order among the following :

1. bond pair - bond pair > lone pair - bond pair > lone pair - lone pair
2. lone pair - bond pair > bond pair - bond pair > lone pair - lone pair
3. lone pair - lone pair > lone pair - bond pair > bond pair - bond pair
4. lone pair - lone pair > bond pair - bond pair > lone pair - bond pair

The correct thermodynamic conditions for the spontaneous reaction at all temperatures is

1. H < 0 and S > 0
2. H < 0 and S < 0
3. H < 0 and S = 0
4. H > 0 and S < 0

Consider the following liquid-vapour equilibrium. Liquid Vapour Which of the following relations is correct ?

1. d PdT2 = - HvT2
2. d PdT = HvRT2
3. d GdT2 = HvRT2
4. d PdT = - HvRT

MY and NY3, two nearly insoluble salts, have the same Ksp values of 6.2 10-13 at room temperature. Which statement would be true in regard to MY and NY3?

1. The salts MY and NY3 are more soluble in 0.5 M KY than in pure water.
2. The addition of the salt of KY to solution of MY and NY3 will have no effect on their solubilities.
3. The molar solubilities of MY and NY3 in water are identical.
4. The molar solubility of MY in water is less than that of NY3.

Which of the following biphenyls is optically active ?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

For the following reactions : (A) CH3CH2CH2Br + KOH CH3CH=CH2 + KBr + H2O (B) [figure] (C) [figure] Which of the following statements is correct?

1. (A) is elimination, (B) and (C) are substitution reactions.
2. (A) is substitution, (B) and (C) are addition reactions.
3. (A) and (B) are elimination reactions and (C) is addition reaction.
4. (A) is elimination, (B) is substitution and (C) is addition reaction.

The correct statement regarding the comparison of staggered and eclipsed conformations of ethane, is

1. the eclipsed conformation of ethane is more stable than staggered conformation even though the eclipsed conformation has torsional strain
2. the staggered conformation of ethane is more stable than eclipsed conformation, because staggered conformation has no torsional strain
3. the staggered conformation of ethane is less stable than eclipsed conformation, because staggered conformation has torsional strain
4. the eclipsed conformation of ethane is more stable than staggered conformation, because eclipsed conformation has no torsional strain.

Consider the nitration of benzene using mixed conc. H2SO4 and HNO3. If a large amount of KHSO4 is added to the mixture, the rate of nitration will be

1. unchanged
2. doubled
3. faster
4. slower

The pair of electrons in the given carbanion, CH3C C-, is present in which of the following orbitals?

1. sp2
2. sp
3. 2p
4. sp3

In the reaction H-C CH [(ii) CH3CH2Br](i) NaNH2/liq. NH3 X [(ii) CH3CH2Br](i) NaNH2/liq. NH3 Y, X and Y are

1. X = 2-Butyne, Y = 2-Hexyne
2. X = 1-Butyne, Y = 2-Hexyne
3. X = 1-Butyne, Y = 3-Hexyne
4. X = 2-Butyne, Y = 3-Hexyne

The reaction [figure] can be classified as

1. dehydration reaction
2. Williamson alcohol synthesis reaction
3. Williamson ether synthesis reaction
4. alcohol formation reaction.

Which of the following reagents would distinguish cis-cyclopentane-1,2-diol from the trans-isomer?

1. MnO2
2. Aluminium isopropoxide
3. Acetone
4. Ozone

The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha-carbon, is

1. a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as carbonylation
2. a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as keto-enol tautomerism
3. a carbonyl compound with a hydrogen atom on its alpha-carbon never equilibrates with its corresponding enol
4. a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as aldehyde-ketone equilibration.

The correct statement regarding the basicity of arylamines is

1. arylamines are generally more basic than alkylamines because of aryl group
2. arylamines are generally more basic than alkylamines, because the nitrogen atom in arylamines is sp-hybridised
3. arylamines are generally less basic than alkylamines because the nitrogen lone-pair electrons are delocalised by interaction with the aromatic ring -electron system
4. arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are not delocalised by interaction with the aromatic ring -electron system.

The product formed by the reaction of an aldehyde with a primary amine is

1. carboxylic acid
2. aromatic acid
3. Schiff's base
4. ketone

The correct statement regarding RNA and DNA, respectively is

1. The sugar component in RNA is arabinose and the sugar component in DNA is ribose
2. The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose
3. The sugar component in RNA is arabinose and the sugar component in DNA is 2'-deoxyribose
4. The sugar component in RNA is ribose and the sugar component in DNA is 2'-deoxyribose.

In a protein molecule various amino acids are linked together by

1. peptide bond
2. dative bond
3. -glycosidic bond
4. -glycosidic bond.

Which one given below is a non-reducing sugar?

1. Glucose
2. Sucrose
3. Maltose
4. Lactose

Which of the following statements about the composition of the vapour over an ideal 1 : 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at 25 . (Given, vapour pressure data at 25 , benzene = 12.8 kPa, toluene = 3.85 kPa)

1. The vapour will contain equal amounts of benzene and toluene.
2. Not enough information is given to make a prediction.
3. The vapour will contain a higher percentage of benzene.
4. The vapour will contain a higher percentage of toluene

At 100 the vapour pressure of a solution of 6.5 g of a solute in 100 g water is 732 mm. If Kb = 0.52, the boiling point of this solution will be

1. 102
2. 103
3. 101
4. 100

The pressure of H2 required to make the potential of H2-electrode zero in pure water at 298 K is

1. 10-10 atm
2. 10-4 atm
3. 10-14 atm
4. 10-12 atm

The rate of first-order reaction is 0.04 mol L-1 s-1 at 10 seconds and 0.03 mol L-1 s-1 at 20 seconds after initiation of the reaction. The half-life period of the reaction is

1. 44.1 s
2. 54.1 s
3. 24.1 s
4. 34.1 s

The addition of a catalyst during a chemical reaction alters which of the following quantities?

1. Enthalpy
2. Activation energy
3. Entropy
4. Internal energy

Match the compounds given in column I with the hybridisation and shape given in column II and mark the correct option

1. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
2. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
3. (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
4. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)

Which is the correct statement for the given acids?

1. Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid.
2. Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid.
3. Both are diprotic acids.
4. Both are triprotic acids.

Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?

1. Br2 > I2 > F2 > Cl2
2. F2 > Cl2 > Br2 > I2
3. I2 > Br2 > Cl2 > F2
4. Cl2 > Br2 > F2 > I2

When copper is heated with conc. HNO3 it produces

1. Cu(NO3)2, NO and NO2
2. Cu(NO3)2 and N2O
3. Cu(NO3)2 and NO2
4. Cu(NO3)2 and NO

Among the following the correct order of acidity is

1. HClO2 < HClO < HClO3 < HClO4
2. HClO4 < HClO2 < HClO < HClO3
3. HClO3 < HClO4 < HClO2 < HClO
4. HClO < HClO2 < HClO3 < HClO4

Which one of the following statements is correct when SO2 is passed through acidified K2Cr2O7 solution?

1. SO2 is reduced.
2. Green Cr2(SO4)3 is formed.
3. The solution turns blue.
4. The solution is decolourised.

The electronic configuration of Eu (Atomic No. 63), Gd (Atomic No. 64) and Tb (Atomic No. 65) are

1. [Xe]4f6 5d1 6s2, [Xe]4f7 5d1 6s2 and [Xe]4f8 5d1 6s2
2. [Xe]4f7 6s2, [Xe]4f7 5d1 6s2 and [Xe]4f9 6s2
3. [Xe]4f7 6s2, [Xe]4f8 6s2 and [Xe]4f8 5d1 6s2
4. [Xe]4f6 5d1 6s2, [Xe]4f7 5d1 6s2 and [Xe]4f9 6s2

Which of the following has longest C-O bond length? (Free C-O bond length in CO is 1.128 Å.)

1. [Fe(CO)4]2-
2. [Mn(CO)6]+
3. Ni(CO)4
4. [Co(CO)4]-

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?

1. 3/8
2. 1/2
3. 1/8
4. 1/4

Which of the following statements about hydrogen is incorrect?

1. Hydronium ion, H3O+ exists freely in solution.
2. Dihydrogen does not act as a reducing agent.
3. Hydrogen has three isotopes of which tritium is the most common.
4. Hydrogen never acts as cation in ionic salts.

Which of the following statements is false?

1. Ca2+ ions are not important in maintaining the regular beating of the heart.
2. Mg2+ ions are important in the green parts of the plants.
3. Mg2+ ions form a complex with ATP.
4. Ca2+ ions are important in blood clotting.

The product obtained as a result of a reaction of nitrogen with CaC2 is

1. CaCN2
2. Ca2CN
3. Ca(CN)2
4. CaCN

Natural rubber has

1. alternate cis- and trans-configuration
2. random cis- and trans-configuration
3. all cis-configuration
4. all trans-configuration.

Lithium has a bcc structure. Its density is 530 kg m-3 and its atomic mass is 6.94 g mol-1. Calculate the edge length of a unit cell of lithium metal. (NA = 6.02 1023 mol-1)

1. 527 pm
2. 264 pm
3. 154 pm
4. 352 pm

The ionic radii of A+ and B- ions are 0.98 10-10 m and 1.81 10-10 m. The coordination number of each ion in AB is

1. 8
2. 2
3. 6
4. 4

Fog is a colloidal solution of

1. solid in gas
2. gas in gas
3. liquid in gas
4. gas in liquid.

Which one of the following characteristics is associated with adsorption?

1. G and H are negative but S is positive.
2. G and S are negative but H is positive.
3. G is negative but H and S are positive.
4. G, H and S all are negative.

Match items of Column I with the items of Column II and assign the correct code :

1. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
2. (a)-(iii), (b)-(iv), (c)-(v), (d)-(i)
3. (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
4. (a)-(ii), (b)-(iii), (c)-(i), (d)-(v)

Which of the following is an analgesic?

1. streptomycin
2. chloromycetin
3. Novalgin
4. Penicillin

Nomenclature is governed by certain universal rules. Which one of the following is contrary to the rules of nomenclature?

1. The names are written in Latin and are italicised.
2. When written by hand the names are to be underlined.
3. Biological names can be written in any language.
4. The first word in a biological name represents the genus name and the second is a specific epithet.

The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the

1. methanogens
2. eubacteria
3. halophiles
4. thermoacidophiles.

Which one of the following statements is wrong?

1. Eubacteria are also called false bacteria.
2. Phycomycetes are also called algal fungi.
3. Cyanobacteria are also called blue-green algae.
4. Golden algae are also called desmids.

Which of the following statements is wrong for viroids?

1. They cause infections.
2. Their RNA is of high molecular weight.
3. They lack a protein coat.
4. They are smaller than viruses.

One of the major components of cell wall of most fungi is

1. cellulose
2. hemicellulose
3. chitin
4. peptidoglycan.

Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the Kingdom

1. Fungi
2. Animalia
3. Monera
4. Protista.

Select the correct statement

1. Sequoia is one of the tallest trees.
2. The leaves of gymnosperms are not well adapted to extremes of climate.
3. Gymnosperms are both homosporous and heterosporous.
4. Salvinia, Ginkgo and Pinus all are gymnosperms.

In bryophytes and pteridophytes, transport of male gametes requires

1. birds
2. water
3. wind
4. insects.

Which of the following is not a stem modification?

1. Tendrils of cucumber
2. Flattened structures of Opuntia
3. Pitcher of Nepenthes
4. Thorns of Citrus

Stems modified into flat green organs performing the functions of leaves are known as

1. phylloclades
2. scales
3. cladodes
4. phyllodes.

Cotyledon of maize grain is called

1. coleoptile
2. scutellum
3. plumule
4. coleorhiza.

Tricarpellary, syncarpous gynoecium is found in flowers of

1. Fabaceae
2. Poaceae
3. Liliaceae
4. Solanaceae

The standard petal of a papilionaceous corolla is also called

1. vexillum
2. corona
3. carina
4. pappus.

A typical fat molecule is made up of

1. one glycerol and one fatty acid molecule
2. three glycerol and three fatty acid molecules
3. three glycerol molecules and one fatty acid molecule
4. one glycerol and three fatty acid molecules.

Which one of the following statements is wrong?

1. Uracil is a pyrimidine.
2. Glycine is a sulphur containing amino acid.
3. Sucrose is a disaccharide.
4. Cellulose is a polysaccharide.

Spindle fibres attach on to

1. centromere of the chromosome
2. kinetosome of the chromosome
3. telomere of the chromosome
4. kinetochore of the chromosome.

Which of the following is not a characteristic feature during mitosis in somatic cells?

1. Chromosome movement
2. Synapsis
3. Spindle fibres
4. Disappearance of nucleolus

In meiosis crossing over is initiated at

1. zygotene
2. diplotene
3. pachytene
4. leptotene.

Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of following options.

1. The above processes happen only during night time.
2. One process occurs during day time and the other at night.
3. Both processes cannot happen simultaneously.
4. Both processes can happen together because the diffusion coefficient of water and CO2 is different.

In a chloroplast the highest number of protons are found in

1. intermembrane space
2. antennae complex
3. stroma
4. lumen of thylakoids.

Emerson's enhancement effect and Red drop have been instrumental in the discovery of

1. photophosphorylation and cyclic electron transport
2. oxidative phosphorylation
3. photophosphorylation and non-cyclic electron transport
4. two photosystems operating simultaneously.

A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?

1. CAM
2. Nitrogen fixer
3. C3
4. C4

Water soluble pigments found in plant cell vacuoles are

1. carotenoids
2. anthocyanins
3. xanthophylls
4. chlorophylls.

The Avena curvature is used for bioassay of

1. IAA
2. ethylene
3. ABA
4. GA3.

The coconut water from tender coconut represents

1. free nuclear proembryo
2. free nuclear endosperm
3. endocarp
4. fleshy mesocarp.

Which one of the following statements is not true?

1. Pollen grains of many species cause severe allergies.
2. Stored pollen in liquid nitrogen can be used in the crop breeding programmes.
3. Tapetum helps in the dehiscence of anther.
4. Exine of pollen grains is made up of sporopollenin.

Seed formation without fertilisation in flowering plants involves the process of

1. somatic hybridisation
2. apomixis
3. sporulation
4. budding.

Proximal end of the filament of stamen is attached to the

1. placenta
2. thalamus or petal
3. anther
4. connective.

Which of the following statements is not correct?

1. Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.
2. Some reptiles have also been reported as pollinators in some plant species.
3. Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.
4. Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers.

A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in -

1. Polyteny
2. Aneuploidy
3. Polyploidy
4. Somaclonal variation

Pick out the correct statements :

1. A, B and C only
2. A, C and D only
3. A and D only
4. B and D only

A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F1 plants were selfed the resulting genotypes were in the ratio of -

1. 3 : 1 :: Tall : Dwarf
2. 1 : 2 : 1 :: Tall heterozygous : Tall homozygous : Dwarf
3. 1 : 2 : 1 :: Tall homozygous : Tall heterozygous : Dwarf
4. 3 : 1 :: Dwarf : Tall

Match the terms in Column-I with their description in Column-II and choose the correct option :

1. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
2. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
3. (a)-(ii), (b)-(ii), (c)-(iv), (d)-(iii)
4. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates

1. Both of the characters are controlled by more than one gene
2. The two genes are linked and present on the same chromosome
3. The two genes are located on two different chromosomes
4. Chromosomes failed to separate during meiosis

Which of the following most appropriately describes haemophilia ?

1. Chromosomal disorder
2. X-linked recessive gene disorder
3. Dominant gene disorder
4. Recessive gene disorder

Which one of the following is the starter codon ?

1. AUG
2. UAG
3. UAA
4. UGA

Which of the following is required as inducer(s) for the expression of Lac operon?

1. lactose
2. lactose and galactose
3. glucose
4. galactose

A complex of ribosomes attached to a single strand of RNA is known as :

1. Polypeptide
2. Okazaki fragment
3. Polysome
4. Polymer

Which of the following is wrongly matched in the given table?

1. Microbe - Streptococcus, Product - Streptokinase, Application - Removal of clot from blood vessel
2. Microbe - Trichoderma polysporum, Product - Cyclosporin A, Application - Immunosuppressive drug
3. Microbe - Monascus purpureus, Product - Statins, Application - Lowering of blood cholesterol
4. Microbe - Clostridium butylicum, Product - Lipase, Application - Removal of oil stains

Which of the following is not required for any of the techniques of DNA fingerprinting available at present?

1. DNA – DNA hybridization
2. Polymerase chain reaction
3. Zinc finger analysis
4. Restriction enzymes

It is much easier for a small animal to run uphill than for a large animal, because -

1. The efficiency of muscles in large animals is less than in the small animals
2. Smaller animals have a higher metabolic rate
3. It is easier to carry a small body weight
4. Small animals have a lower O2 requirement

When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt = rN(1-N/K)

1. When death rate is greater than birth rate.
2. When N/K equals zero.
3. When N/K is exactly one.
4. When N nears the carrying capacity of the habitat.

Gause's principle of competitive exclusion states that -

1. Larger organisms exclude smaller ones through competition
2. More abundant species will exclude the less abundant species through competition
3. Competition for the same resources excludes species having different food preferences
4. No two species can occupy the same niche indefinitely for the same limiting resources

Which of the following would appear as the pioneer organisms on bare rocks?

1. Lichens
2. Green algae
3. Liverworts
4. Mosses

Which one of the following is a characteristic feature of cropland ecosystem ?

1. Absence of weeds
2. Absence of soil organisms
3. Ecological succession
4. Least genetic diversity

The term ecosystem was coined by :

1. E.P. Odum
2. E. Haeckel
3. E. Warming
4. A.G. Tansley

Which is the National Aquatic Animal of India ?

1. River dolphin
2. Sea-horse
3. Gangetic shark
4. Blue whale

Which of the following is the most important cause of animals and plants being driven to extinction ?

1. Co-extinctions
2. Over-exploitation
3. Alien species invasion
4. Habitat loss and fragmentation

Specialised epidermal cells surrounding the guard cells are called -

1. Lenticels
2. Complementary cells
3. Bulliform cells
4. Subsidiary cells

Mitochondria and chloroplast are- Which one of the following options is correct?

1. Both A and B are false
2. Both A and B are correct
3. B is true but A is false
4. A is true but B is false

Microtubules are the constituents of

1. Cilia, Flagella and Peroxisomes
2. Centrosome, Nucleosome and Centrioles
3. Spindle fibres, Centrioles and Cilia
4. Centrioles, spindle fibres and chromatin

Which one of the following cell organelles is enclosed by a single membrane?

1. Mitochondria
2. Chloroplasts
3. Lysosomes
4. Nuclei

In which of the following all three are macronutrients?

1. Molybdenum, magnesium, manganese
2. Nitrogen, phosphorus, sulphur
3. Boron, Zinc, manganese
4. Iron, copper, molybdenum

A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called -

1. Shifting agriculture
2. Strip farming
3. Ley farming
4. Contour farming

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers

1. Methane
2. Ozone
3. Nitrous oxide
4. Ammonia

Joint Forest Management Concept was introduced in India during :

1. 1990s
2. 1970s
3. 1960s
4. 1980s

A river with an inflow of domestic sewage rich in organic waste may result in -

1. Death of fish due to lack of oxygen
2. Increased population of aquatic food web organisms
3. Drying of the river very soon due to algal bloom
4. An increased production of fish due to biodegradable nutrients

Which of the following characteristic features always holds true for the corresponding group of animals?

1. Possess a mouth with an upper and a lower jaw – Chordata
2. 3-chambered heart with one incompletely divided ventricle – Reptilia
3. Cartilaginous endoskeleton – Chondrichthyes
4. Viviparous – Mammalia

Which one of the following characteristics is not shared by birds and mammals?

1. Viviparity
2. Warm blooded nature
3. Ossified endoskeleton
4. Breathing using lungs

Which of the following features is not present in the Phylum Arthropoda?

1. Parapodia
2. Jointed appendages
3. Chitinous exoskeleton
4. Metameric segmentation

Reduction in pH of blood will

1. decrease the affinity of haemoglobin with oxygen
2. release bicarbonate ions by the liver
3. reduce the rate of heart beat
4. reduce the blood supply to the brain.

Name the chronic respiratory disorder caused mainly by cigarette smoking.

1. Respiratory acidosis
2. Respiratory alkalosis
3. Emphysema
4. Asthma

Asthma may be attributed to

1. inflammation of the trachea
2. accumulation of fluid in the lungs
3. bacterial infection of the lungs
4. allergic reaction of the mast cells in the lungs.

Blood pressure in the pulmonary artery is

1. more than that in the pulmonary vein
2. less than that in the venae cavae
3. same as that in the aorta
4. more than that in the carotid.

In mammals, which blood vessel would normally carry largest amount of urea?

1. Hepatic Vein
2. Hepatic Portal Vein
3. Renal Vein
4. Dorsal Aorta

Lack of relaxation between successive stimuli in sustained muscle contraction is known as

1. tetanus
2. tonus
3. spasm
4. fatigue.

Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other?

1. Aldosterone – Atrial Natriuretic Factor
2. Relaxin – Inhibin
3. Parathormone – Calcitonin
4. Insulin – Glucagon

The amino acid tryptophan is the precursor for the synthesis of

1. estrogen and progesterone
2. cortisol and cortisone
3. melatonin and serotonin
4. thyroxine and triiodothyronine.

Changes in GnRH pulse frequency in females is controlled by circulating levels of

1. progesterone only
2. progesterone and inhibin
3. estrogen and progesterone
4. estrogen and inhibin.

Fertilisation in humans is practically feasible only if

1. the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the cervix
2. the sperms are transported into cervix within 48 hrs of release of ovum in uterus
3. the sperms are transported into vagina just after the release of ovum in Fallopian tube
4. the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the Fallopian tube.

Select the incorrect statement.

1. LH and FSH decrease gradually during the follicular phase.
2. LH triggers secretion of androgen from the Leydig cells.
3. FSH stimulates the Sertoli cells which help in spermiogenesis.
4. LH triggers ovulation in ovary.

Identify the correct statement on 'inhibin'.

1. Is produced by granulosa cells in ovary and inhibits the secretion of LH
2. Is produced by nurse cells in testes and inhibits the secretion of LH
3. Inhibits the secretion of LH, FSH and prolactin
4. Is produced by granulosa cells in ovary and inhibits the secretion of FSH

Which of the following approaches does not give the defined action of contraceptive ?

1. Intra uterine devices Increase phagocytosis of sperms, suppress sperm motility and fertilizing capacity of sperm
2. Barrier methods Prevent fertilization
3. Hormonal contraceptives Prevent/retard entry of sperm, prevent ovulation and fertilization
4. Vasectomy Prevents spermatogenesis

In context of Amniocentesis, which of the following statements is incorrect ?

1. It can be used for detection of Down syndrome
2. It is usually done when a woman is between 14-16 weeks pregnant
3. It is used for prenatal sex determination
4. It can be used for detection of Cleft palate

Which of the following structures is homologous to the wing of a bird ?

1. Wing of a Moth
2. Dorsal fin of a Shark
3. Flipper of Whale
4. Hindlimb of Rabbit

Analogous structures are a result of :

1. Divergent evolution
2. Convergent evolution
3. Stabilizing selection
4. Shared ancestry

Following are the two statements regarding the origin of life - Of the above statements which one of the following options is correct ?

1. Both A and B are false
2. Both A and B are correct
3. B is correct but A is false
4. A is correct but B is false

Antivenom injection contains preformed antibodies while polio drops that are administered into the body contain -

1. Attenuated pathogens
2. Activated pathogens
3. Harvested antibodies
4. Gamma globulin

Which of the following statements is not true for cancer cells in relation to mutations ?

1. Mutations inhibit production of telomerase
2. Mutations in proto-oncogenes accelerate the cell cycle
3. Mutations destroy telomerase inhibitor
4. Mutations inactivate the cell control

In higher vertebrates, the immune system can distinguish self-cells and non-self. If this property is lost due to genetic abnormality and it attacks self-cells, then it leads to

1. Active immunity
2. Allergic response
3. Graft rejection
4. Auto-immune disease

Which of the following is not a feature of the plasmids ?

1. Single-stranded
2. Transferable
3. Independent replication
4. Circular structure

The taq polymerase enzyme is obtained from

1. Thermus aquaticus
2. Bacillus subtilis
3. Pseudomonas putida
4. Thiobacillus ferrooxidans

Which of the following is a restriction endonuclease ?

1. DNase I
2. Hind II
3. RNase I
4. Protease

The two polypeptides of human insulin are linked together by

1. Hydrogen bonds
2. Covalent bond
3. Disulphide bridges
4. Phosphodiester bond

Which part of the tobacco plant is infected by Meloidogyne incognita ?

1. Flower
2. Stem
3. Leaf
4. Root

Which type of tissue correctly matches with its locations ?

1. Tissue Smooth muscle , Location Wall of intestine
2. Tissue Areolar tissue, Location Tendons
3. Tissue Cuboidal epithelium, Location Lining of stomach
4. Tissue Transitional epithelium, Location Tip of nose

Which of the following features is not present in Periplaneta americana?

1. Indeterminate and radial cleavage during embryonic development
2. Schizocoelom as body cavity
3. Metamerically segmented body
4. Exoskeleton composed of N-acetylglucosamine

Which of the following guards the opening of hepatopancreatic duct into the duodenum?

1. Pyloric sphincter
2. Sphincter of Oddi
3. Semilunar valve
4. Ileocaecal valve

In the stomach, gastric acid is secreted by the

1. peptic cells
2. acidic cells
3. gastrin secreting cells
4. parietal cells.

Photosensitive compound in human eye is made up of

1. opsin and retinol
2. transducin and retinene
3. guanosine and retinol
4. opsin and retinal.