# Solved papers for NEET NEET SOLVED PAPER 2017

### done NEET SOLVED PAPER 2017

• question_answer1) 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

A) 1 : 14

B) 1 : 6

C) 1 : 9

D) 1 : 11

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• question_answer2) Thermodynamic processes are indicated in the following diagram.

• Match the following
 Column-I Column-II P. Process I a. Adiabatic Q. Process II b. Isobaric R. Process III c. Isochoric S. Process IV d. Isothermal

A) $P\to d,\,Q\to b,\,R\to a,\,S\to c$

B) $P\to a,\,Q\to c,\,R\to d,\,S\to b$

C)   $P\to c,\,Q\to a,\,R\to d,\,S\to b$

D)   $P\to c,\,Q\to d,\,R\to b,\,S\to a$

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• question_answer3) 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

A) Increases by a factor of 2

B) Increases by a factor of 4

C) Decreases by a factor of 2

D) Remains the same

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• question_answer4) 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 the other side. Meanwhile the water rises by 65 mm from its original level (see diagram). The density of the oil is

A) $928\,kg\,{{m}^{-3}}$

B) $650\,kg\,{{m}^{-3}}$

C) $425\,kg\,{{m}^{-3}}$

D) $800\,kg\,{{m}^{-3}}$

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• question_answer5) The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m, is

A) $\frac{2h}{\sqrt{mkT}}$

B) $\frac{h}{\sqrt{mkT}}$

C) $\frac{h}{\sqrt{3mkT}}$

D) $\frac{2h}{\sqrt{3mkT}}$

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• question_answer6) 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

A) $d=2\,km$

B) $d=\frac{1}{2}\,km$

C) $d=\,1\,km$

D) d=\frac{\begin{align} & 3 \\ & 3 \\ \end{align}}{2}\,km

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• question_answer7) The$x$and y coordinates of the particle at any time are $x=5t-2{{t}^{2}}$and $y=10t$respectively, where$x$ and y are in meters and t in seconds. The acceleration of the particle at t = 2 s is

A) $-8\,m/{{s}^{2}}$

B) 0

C) $5\,m/{{s}^{2}}$

D) $-4\,m/{{s}^{2}}$

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• question_answer8) In a common emitter transistor amplifier the audio signal voltage across the collector is 3 V. The resistance of collector is$3\,k\Omega .$If current gain is 100 and the base resistance is $2\,k\Omega ,$ the voltage and power gain of the amplifier is

A) 20 and 2000

B) 200 and 1000

C) 15 and 200

D) 150 and 15000

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• question_answer9) 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

A)  $\frac{{{\mu }_{0}}{{l}^{2}}}{\sqrt{2}\pi d}$

B)   $\frac{{{\mu }_{0}}{{l}^{2}}}{2\pi d}$

C) $\frac{2{{\mu }_{0}}{{l}^{2}}}{\pi d}$

D) $\frac{\sqrt{2}{{\mu }_{0}}{{l}^{2}}}{\pi d}$

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• question_answer10) Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will:

A) Will become stationary

B) Keep floating at the same distance between them

C) Move towards each other

D) Move away from each other

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• question_answer11) 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

A) 100 J

B) 1 J

C) 90 J

D) 99 J

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• question_answer12) A 250-Turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of $85\,\mu A$and subjected to a magnetic field of strength 0.85 T. Work done for rotating the coil by ${{180}^{o}}$ against the torque is

A) $1.15\,\mu J$

B) $9.1\,\mu J$

C) $4.55\,\mu J$

D) $2.3\,\mu J$

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• question_answer13) Which one of the following represents forward bias diode?

A)

B)

C)

D)

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• question_answer14) The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is

A) 0.5

B) 2

C) 1

D) 4

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• question_answer15) Figure shows a circuit contains three identical resistors with resistance$R=9.0\,\Omega$each, two identical inductors with inductance L = 2.0 mH each, and an ideal battery with emf $\varepsilon =18\,V.$ The current 'i' through the battery just after the switch closed is

A) 0 ampere

B) 2 mA

C) 0.2 A

D) 2 A

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• question_answer16) Two blocks A and B of masses 3m 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) $\frac{g}{3},\frac{g}{3}$

B) $g,\frac{g}{3}$

C) $\frac{g}{3},g$

D) $g,g$

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• question_answer17) A long solenoid of diameter 0.1 m has$2\times {{10}^{4}}$ 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 in 0.05 s. If the resistance of the coil is$10{{\pi }^{2}}\Omega ,$ the total charge flowing through the coil during this time is

A) $16\pi \,\mu C$

B) $32\pi \,\mu C$

C) $16\mu C$

D) $32\,\mu C$

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• question_answer18) A physical quantity of the dimensions of length that can be formed out of c, G and$\frac{{{e}^{2}}}{4\pi {{\varepsilon }_{0}}}$ is [c is velocity of light, G is universal constant of gravitation and e is charge]

A) $\frac{1}{c}G\frac{{{e}^{2}}}{4\pi {{\varepsilon }_{0}}}$

B) $\frac{1}{{{c}^{2}}}{{\left[ G\frac{{{e}^{2}}}{4\pi {{\varepsilon }_{0}}} \right]}^{\frac{1}{2}}}$

C) ${{c}^{2}}{{\left[ G\frac{{{e}^{2}}}{4\pi {{\varepsilon }_{0}}} \right]}^{\frac{1}{2}}}$

D) $\frac{1}{{{c}^{2}}}{{\left[ \frac{{{e}^{2}}}{G4\pi {{\varepsilon }_{0}}} \right]}^{\frac{1}{2}}}$

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• question_answer19) In an electromagnetic wave in free space the root mean square value of the electric field is ${{E}_{rms}}=6\,V/m.$The peak value of the magnetic field is

A) $4.23\times {{10}^{-8}}T$

B) $1.41\times {{10}^{-8}}T$

C) $2.83\times {{10}^{-8}}T$

D) $0.70\times {{10}^{-8}}T$

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• question_answer20) 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

A) $\frac{R}{{{n}^{2}}}$

B)  $nR$

C)   $\frac{R}{n}$

D)  ${{n}^{2}}R$

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• question_answer21) The ratio of resolving powers of an optical microscope for two wavelengths ${{\lambda }_{1}}=4000\,\overset{\text{o}}{\mathop{\text{A}}}\,$and ${{\lambda }_{2}}=6000\,\overset{\text{o}}{\mathop{\text{A}}}\,$is

A) 16 : 81

B) 8 : 27

C) 9 : 4

D) 3 : 2

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• question_answer22) A thin prism having refracting angle${{10}^{o}}$ 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

A) ${{10}^{o}}$

B) ${{4}^{o}}$

C) ${{6}^{o}}$

D) ${{8}^{o}}$

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• question_answer23) Two Polaroids ${{P}_{1}}$and${{P}_{2}}$are placed with their axis perpendicular to each other. Un polarised light ${{l}_{0}}$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${{45}^{o}}$with that of${{P}_{1}}.$The intensity of transmitted light through${{P}_{2}}$ is

A) $\frac{{{l}_{0}}}{16}$

B) $\frac{{{l}_{0}}}{2}$

C) $\frac{{{l}_{0}}}{4}$

D) $\frac{{{l}_{0}}}{8}$

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• question_answer24) A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F, because the method involves:

A) A combination of cells, galvanometer and resistances

B) Cells

C) Potential gradients

D) A condition of no current flow through the galvanometer

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• question_answer25) 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?

A) 40 Hz

B) 10 Hz

C) 20 Hz

D) 30 Hz

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• question_answer26) 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$\theta ,$the spot of the light is found to move through a distance y on the scale. The angle$\theta$ is given by

A) $\frac{x}{y}$

B) $\frac{y}{2x}$

C) $\frac{y}{x}$

D) $\frac{x}{2y}$

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• question_answer27) The given electrical network is equivalent to

A) NOT gate

B) AND gate

C) OR gate

D) NOR gate

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• question_answer28) 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

A) $\frac{2\pi }{\sqrt{3}}$

B) $\frac{\sqrt{5}}{\pi }$

C) $\frac{\sqrt{5}}{2\pi }$

D) $\frac{4\pi }{\sqrt{5}}$

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• question_answer29) 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

A) ${{t}_{1}}-{{t}_{2}}$

B) $\frac{{{t}_{1}}+{{t}_{2}}}{2}$

C) $\frac{{{t}_{1}}{{t}_{2}}}{{{t}_{2}}-{{t}_{1}}}$

D) $\frac{{{t}_{1}}{{t}_{2}}}{{{t}_{2}}+{{t}_{1}}}$

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• question_answer30) 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 ${{\omega }_{1}}$ and${{\omega }_{2}}.$They are brought into contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is

A) $\frac{l}{8}{{({{\omega }_{1}}-{{\omega }_{2}})}^{2}}$

B) $\frac{1}{2}l{{({{\omega }_{1}}+{{\omega }_{2}})}^{2}}$

C) $\frac{1}{4}l{{({{\omega }_{1}}-{{\omega }_{2}})}^{2}}$

D) $l{{({{\omega }_{1}}-{{\omega }_{2}})}^{2}}$

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• question_answer31) 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

A) $11\,RT$

B) $4RT$

C) $15\,RT$

D) $9\,RT$

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• question_answer32) The bulk modulus of a spherical object is 'B'. If it is subjected to uniform pressure 'p' , the fractional decrease in radius is

A) $\frac{\rho }{3B}$

B) $\frac{\rho }{B}$

C) $\frac{B}{3p}$

D)   $\frac{3p}{B}$

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• question_answer33) 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 center) will be (T represents the tension in the string)

A)  Zero

B)  T

C)  $T+\frac{m{{v}^{2}}}{l}$

D) $T-\frac{m{{v}^{2}}}{l}$

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• question_answer34) 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?

A) $~5\text{ }m/{{s}^{2}}$

B) $~25\text{ }m/{{s}^{2}}$

C) $~0.25\text{ }rad/{{s}^{2}}$

D) $~25\text{ }rad/{{s}^{2}}$

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• question_answer35) Young?s double slit experiment is first performed in air and then in a medium other than air. It is found that 8th bright fringe in the medium lies where 5th dark fringe lies in air. The refractive index of the medium is nearly

A) 1.78

B) 1.25

C) 1.59

D) 1.69

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• question_answer36) Suppose the charge of a proton and an electron differ slightly. One of them is ?e, the other is$(e+\Delta e).$ 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 $\Delta e$ is of the order of [Given mass of hydrogen ${{m}_{h}}=1.67\times {{10}^{-27}}kg]$

A) ${{10}^{-47}}C$

B) ${{10}^{-20}}C$

C) ${{10}^{-23}}C$

D) ${{10}^{-37}}C$

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• question_answer37) 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) $2({{K}_{1}}+{{K}_{2}})$

B) $\frac{{{K}_{1}}+{{K}_{2}}}{2}$

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

D) ${{K}_{1}}+{{K}_{2}}$

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• question_answer38) The photoelectric threshold wavelength of silver is$3250\times {{10}^{-10}}m.$The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength $2536\times {{10}^{-10}}m$is (Given $h=4.14\times {{10}^{-15}}eVs$and$c=3\times {{180}^{8}}\,m{{s}^{-1}}$)

A) $\approx 0.3\times {{10}^{6}}\,m{{s}^{-1}}$

B) $\approx 6\times {{10}^{5}}\,m{{s}^{-1}}$

C) $\approx 0.6\times {{10}^{6}}\,m{{s}^{-1}}$

D) $\approx 61\times {{10}^{3}}\,m{{s}^{-1}}$

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• question_answer39) 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]

A) 448 Hz

B) 350 Hz

C) 361 Hz

D) 411 Hz

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• question_answer40) 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

A)  (i) 10 J             (ii)  -8.75 J

B)  (i)  -10 J           (ii) -8.25 J

C)  (i) 1.25 J                               (ii) -8.25 J

D)   (i) 100 J                               (ii) 8.75 J

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• question_answer41) 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

A) 1800

B) 225

C) 450

D) 1000

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• question_answer42) The diagrams below show regions of equal potentials.

 [a] [b] [c] [d]
A positive charge is moved from A to B in each diagram.

A) Maximum work is required to move q in figure [b].

B) Maximum work is required to move q in figure [c].

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

D) Minimum work is required to move q in figure [a].

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• question_answer43) 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.

A) C and D

B) B and D

C) A and B

D) B and C

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• question_answer44) If${{\theta }_{1}}$and${{\theta }_{2}}$be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip$\theta$ is given by

A) ${{\tan }^{2}}\theta ={{\tan }^{2}}{{\theta }_{1}}-{{\tan }^{2}}{{\theta }_{2}}$

B) ${{\cot }^{2}}\theta ={{\cot }^{2}}{{\theta }_{1}}+{{\cot }^{2}}{{\theta }_{2}}$

C) ${{\tan }^{2}}\theta ={{\tan }^{2}}{{\theta }_{1}}+{{\tan }^{2}}{{\theta }_{2}}$

D) ${{\cot }^{2}}\theta ={{\cot }^{2}}{{\theta }_{1}}-{{\cot }^{2}}{{\theta }_{2}}$

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• question_answer45) Radioactive material 'A' has decay constant $'8\lambda '$and material 'B' has decay constant $'\lambda '.$ Initially they have same number of nuclei. After what time, the ratio of number of nuclei of material 'B' to that 'A' will be $\frac{1}{e}$?

A) $\frac{1}{9\lambda }$

B) $\frac{1}{\lambda }$

C) $\frac{1}{7\lambda }$

D) $\frac{1}{8\lambda }$

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• question_answer46) The equilibrium constants of the following are. ${{N}_{2}}+3{{H}_{2}}\rightleftharpoons 2N{{H}_{3}}\,{{K}_{4}}$ ${{N}_{2}}+{{O}_{2}}\rightleftharpoons 2NO\,{{K}_{2}}$ ${{H}_{2}}+\frac{1}{2}{{O}_{2}}\xrightarrow{{}}{{H}_{2}}O\,{{K}_{3}}$ The equilibrium constant (K) of the reaction $2N{{H}_{3}}+\frac{5}{2}{{O}_{2}}\xrightarrow{k}2NO+3{{H}_{2}}O,$will be

A) $K_{2}^{3}{{K}_{3}}/{{K}_{1}}$

B) ${{K}_{1}}K_{3}^{3}/{{K}_{2}}$

C) ${{K}_{2}}K_{3}^{3}/{{K}_{1}}$

D) ${{K}_{2}}{{K}_{3}}/{{K}_{1}}$

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• question_answer47) The heating of phenyl-methyl ethers with HI produces.

A) Benzene

B) Ethyl chlorides

C) Iodobenzene

D) Phenol

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• question_answer48) The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is

A) Steam distillation

B) Sublimation

C) Chromatography

D) Crystallisation

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• question_answer49) Predict the correct intermediate and product in the following reaction ${{H}_{3}}C-C\equiv CH\xrightarrow[HgS{{O}_{4}}]{{{H}_{2}}O,{{H}_{2}}S{{O}_{4}}}\underset{\text{(A)}}{\mathop{\text{intermediate}}}\,\xrightarrow{{}}\underset{\text{(B)}}{\mathop{\text{product}}}\,$

A) $A:{{H}_{3}}C-\underset{OH}{\mathop{\underset{|}{\mathop{C}}\,}}\,=C{{H}_{2}}$ $B:{{H}_{3}}C-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}$

B) $A:{{H}_{3}}C-\underset{S{{O}_{4}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,=C{{H}_{2}}$ $B:{{H}_{3}}C-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,=C{{H}_{3}}$

C) $A:{{H}_{3}}C-\underset{OH}{\mathop{\underset{|}{\mathop{C}}\,}}\,=C{{H}_{2}}$ $B:{{H}_{3}}C-\underset{S{{O}_{4}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,=C{{H}_{2}}$

D) $A:{{H}_{3}}C-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}$ $B:{{H}_{3}}C-C\equiv CH$

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• question_answer50) Which of the following reactions is zappropriate for converting acetamide to methanamine?

A) Gabriels phthalimide synthesis

B) Carbylamine reaction

C) Hoffmann hypobromamide reaction

D) Stephens reaction

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• question_answer51) The IUPAC name of the compound

A) 3-keto-2-methylhex-5-enal

B) 3-keto-2-methylhex-4-enal

C) 5-formylhex-2-en-3-one

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

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• question_answer52) Which of the following is a sink for CO?

A) Plants

B) Haemoglobin

C) Micro-organisms present in the soil

D) Oceans

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• question_answer53) Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

A)

B)

C)

D)

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• question_answer54) Which of the following pairs of compounds is isoelectronic and isostructural?

A) $I{{F}_{3}},Xe{{F}_{2}}$

B) $BeC{{l}_{2}},Xe{{F}_{2}}$

C) $Te{{l}_{2}},Xe{{F}_{2}}$

D) $IBr_{2}^{-},Xe{{F}_{2}}$

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• question_answer55) Consider the reactions:

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

B) A-Methoxymethane, X-Ethanoic acid, Y-Acetate ion, Z-hydrazine

C) A-Methoxymethane, X-Ethanol, Y-Ethanoic acid, Z-Semicarbazide

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

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• question_answer56) Which one is the most acidic compound?

A)

B)

C)

D)

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• question_answer57) Name the gas that can readily decolourises acidified$KMn{{O}_{4}}$solution:

A) ${{P}_{2}}{{O}_{5}}$

B) $C{{O}_{2}}$

C) $S{{O}_{2}}$

D) $N{{O}_{2}}$

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• question_answer58) Which one is the correct order of acidity?

A) $C{{H}_{3}}=C{{H}_{3}}>C{{H}_{2}}=C{{H}_{2}}>C{{H}_{3}}-C=CH>CH=CH$

B) $C{{H}_{2}}=C{{H}_{2}}>C{{H}_{3}}-CH=C{{H}_{2}}>C{{H}_{3}}-C\equiv CH>$$CH\equiv CH$

C) $CH\equiv CH>C{{H}_{3}}-C\equiv CH>C{{H}_{2}}=C{{H}_{2}}>C{{H}_{3}}-C{{H}_{3}}$

D) $CH\equiv CH>C{{H}_{2}}=C{{H}_{2}}>C{{H}_{3}}-C\equiv CH>C{{H}_{3}}-C{{H}_{3}}$

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• question_answer59) Concentration of the$A{{g}^{+}}$ions in a saturated solution of $A{{g}_{2}}{{C}_{2}}{{O}_{4}}$is $2.2\times {{10}^{-4}}\,mol\,{{L}^{-1}}.$Solubility product of $A{{g}_{2}}{{C}_{2}}{{O}_{4}}$is

A) $5.3\times {{10}^{12}}$

B) $~2.42\times {{10}^{8}}$

C) $2.66\times {{10}^{12}}$

D) $~4.5\times {{10}^{11}}$

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• question_answer60) With respect to the conformers of ethane, which of the following statements is true?

A) Both bond angles and bond length remains same

B) Bond angle remains same but bond length changes

C) Bond angle changes but bond length remains

D) Both bond angle and bond length change

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• question_answer61) The correct statement regarding electrophile is

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

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

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

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

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• question_answer62) Which one is the wrong statement?

A) The energy of 2s orbital is less than the energy of 2p orbital in case of Hydrogen like atoms

B) de-Broglie's wavelength is given by $\lambda =\frac{h}{mv},$ where m = mass of the particle, v = group velocity of the particle

C) The uncertainty principle is $\Delta E\times \Delta t\ge \frac{h}{4\pi }$

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

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• question_answer63) Correct increasing order for the wavelengths of absorption in the visible region for the complexes of $C{{o}^{3+}}$is

A) ${{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}},{{[Co{{(en)}_{3}}]}^{3+}},{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}$

B) ${{[Co{{(en)}_{3}}]}^{3+}},{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}},{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}$

C) ${{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}},{{[Co{{(en)}_{3}}]}^{3+}},{{[Co{{(N{{H}_{3}}O)}_{6}}]}^{3+}}$

D) ${{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}},{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}},{{[Co{{(e{{n}_{3}})}_{3}}]}^{3+}}$

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• question_answer64) Match the inter halogen 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

A) A-iv B-iii C-ii D-i

B) A-iii B-iv C-i D-ii

C) A-iii B-i C-iv D-ii

D) A-v B-iv C-iii D-ii

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• question_answer65) The species, having bond angles of ${{120}^{o}}$ is

A) $BC{{l}_{3}}$

B) $P{{H}_{3}}$

C) $CI{{F}_{3}}$

D) $NC{{l}_{3}}$

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• question_answer66) The correct increasing order of basic strength for the following compounds is

 (i) (ii) (iii)

A) II < I < III

B) II < III < I

C) III < I < II

D) III < II < I

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• question_answer67) Which one of the following statements is not correct?

A) Coenzymes increase the catalytic activity of enzyme

B) Catalyst does not initiate any reaction

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

D) Enzymes catalyse mainly bio-chemical reactions

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• question_answer68) 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 $\Delta U$ of the gas in joules will be

A)  +505 J

B) 1136.25 J

C) -500 J

D) -505 J

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• question_answer69) A 20 litre container at 400 K contains $C{{O}_{2}}(g)$pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the containers is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of $C{{O}_{2}}$attains its maximum value, will be (Given that:$SrC{{O}_{3}}(s)=SrO(s)+C{{O}_{2}}(g).$${{K}_{p}}=1.6\,\text{atm})$

A) 2 litre

B) 5 litre

C) 10 litre

D) 4 litre

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• question_answer70) Which of the following statements is not correct?

A) Denaturation makes the proteins more active

B) Insulin maintains sugar level in the blood of a human body

C) Ovalbumin is a simple food reserve in egg-white

D) Blood proteins thrombin and fibrinogen are involved in blood clotting

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• question_answer71) Mechanism of a hypothetical reaction${{X}_{2}}+{{Y}_{2}}\to 2XY$ 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

A) 1.5

B) 1

C) 2

D) 0

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• question_answer72) In which pair of ions both the species contain S-S bond?

A) ${{S}_{4}}O_{6}^{2-},{{S}_{2}}O_{7}^{2-}$

B) ${{S}_{2}}O_{7}^{2-},{{S}_{2}}O_{3}^{2-}$

C) ${{S}_{4}}O_{6}^{2-},{{S}_{2}}O_{3}^{2-}$

D) ${{S}_{2}}O_{7}^{2-},{{S}_{2}}O_{8}^{2-}$

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• question_answer73) Which one of the following pairs of species have the same bond order?

A) ${{N}_{2}}O_{2}^{-}$

B) $CO,NO$

C) ${{O}_{2}},N{{O}^{+}}$

D) $C{{N}^{-}},CO$

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• question_answer74) Mixture of chloroxylenol and terpineol acts as

A) Antibiotic

B) Analgesic

C) Antiseptic

D) Antipyretic

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• question_answer75) It is because of inability of$n{{s}^{2}}$electrons of the valence shell to participate in bonding that

A) $S{{n}^{4+}}$ is reducing while $P{{b}^{4+}}$ is oxidizing

B) $S{{n}^{2+}}$is reducing while $P{{b}^{4+}}$is oxidizing

C) $S{{n}^{2+}}$ is oxidising while $P{{b}^{4+}}$is reducing

D) $S{{n}^{2+}}$and$P{{b}^{2+}}$are both oxidising and reducing

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• question_answer76) For a given reaction,$\Delta =35.5\,kJ\,mo{{l}^{-1}}$ and $\Delta S=83.6\,J{{K}^{-1}}\,mo{{l}^{-1}}.$The reaction is spontaneous at : (Assume that$\Delta H$and$\Delta S$ do not vary with temperature)

A)  T > 298 K

B) T < 425 K

C) T > 425 K

D)  All temperatures

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• question_answer77) If molality of the dilute solution is doubled, the value of molal depression constant $({{K}_{f}})$will be

A) Unchanged

B) Doubled

C) Halved

D) Tripled

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• question_answer78) Which of the following is dependent on temperature?

A) Weight percentage

B) Molality

C) Molarity

D) Mole fraction

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• question_answer79) Pick out the correct statement with respect ${{[Mn{{(CN)}_{6}}]}^{3-}}$

A) It is $ds{{p}^{2}}$hybridised and square planar

B) It is $s{{p}^{3}}{{d}^{2}}$hybridised and octahedral

C) It is $s{{p}^{3}}{{d}^{2}}$ hybridised and tetrahedral

D) It is${{d}^{2}}s{{p}^{3}}$ hybridised and octahedral

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• question_answer80) Which is the incorrect statement?

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

B) $Fe{{O}_{0.98}}$ has non stoichiometric metal deficiency defect

C) Density decreases in case of crystals with Schottky's defect

D) $NaCl(s)$is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal

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• question_answer81) $HgC{{l}_{2}}$and ${{l}_{2}}$ both when dissolved in water containing ${{l}^{-}}$ions the pair of species formed is

A) $H{{g}_{2}}{{l}_{2}},{{l}^{-}}$

B) $Hg{{l}_{2}},l_{3}^{-}$

C) $Hg{{l}_{2}},{{l}^{-}}$

D) $Hgl_{4}^{2-},l_{3}^{-}$

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• question_answer82) Extraction of gold and silver involves leaching with $C{{N}^{-}}$ion. Silver is later recovered by

A) Displacement with Zn

B) Liquation

C) Distillation

D) Zone refining

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• question_answer83) The correct order of the stoichiometries of AgCl formed when$AgN{{O}_{3}}$in excess is treated with the complexes :$CoC{{l}_{3}}.6N{{H}_{3}},CoC{{l}_{3}}.5N{{H}_{3}},CoC{{l}_{3}}.4N{{H}_{3}}$ respectively is

A) $2\,AgCl,3AgCl,\,1\,AgCl$

B) $1\,AgCl,3AgCl,\,2\,AgCl$

C) $3\,AgCl,1AgCl,\,2\,AgCl$

D) $3\,AgCl,2AgCl,\,1\,AgCl$

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• question_answer84) Identify A and predict the type of reaction

A)

B)

C)

D)

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• question_answer85) An example of a sigma bonded organometallic compound is

A) Cobaltocene

B) Ruthenocene

C) Grignard's reagent

D) Ferrocene

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• question_answer86) The reason for greater range of oxidation states in actinoids is attributed to

A) 4f and 5d levels being close in energies

B) The radioactive nature of actinoids

C) Actinoid contraction

D) 5f, 6d and 7s levels having comparable energies

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• question_answer87) The element Z = 114 has been discovered recently. It will belong to which of the following family group and electronic configuration?

A) Nitrogen family, $[Rn]5{{f}^{14}}6{{d}^{10}}7{{s}^{2}}7{{p}^{6}}$

B) Halogen family, $[Rn]5{{f}^{14}}6{{d}^{10}}7{{s}^{2}}7{{p}^{5}}$

C) Carbon family, $[Rn]5{{f}^{14}}6{{d}^{10}}7{{s}^{2}}7{{p}^{2}}$

D) Oxygen family,$[Rn]5{{f}^{14}}6{{d}^{10}}7{{s}^{2}}7{{p}^{4}}$

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• question_answer88) A first order reaction has a specific reaction rate of${{10}^{-2}}{{s}^{-1}}.$ How much time will it take for 20 g of the reactant to reduce to 5 g?

A) 693.0 second

B) 238.6 second

C) 138.6 second

D) 346.5 second

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• question_answer89) Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

A) Li

B) Na

C) K

D) Rb

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• question_answer90) In the electrochemical cell $Zn|ZnS{{O}_{4}}(0.01)||CuS{{O}_{4}}(1.0\,M)Cu,$the emf of this Daniel cell is${{E}_{1}}.$When the concentration of $ZnS{{O}_{4}}$is changed to 1.0 M and that of $CuS{{O}_{4}}$changed to 0.01 M, emf changes to${{E}_{2}}.$From the following, which one is the relationship between${{E}_{1}}$and${{E}_{2}}$? (Given, $\frac{RT}{F}=0.059$)

A) ${{E}_{2}}=0\ne {{E}_{1}}$

B) ${{E}_{1}}={{E}_{2}}$

C) ${{E}_{1}}<{{E}_{2}}$

D) ${{E}_{1}}>{{E}_{2}}$

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• question_answer91) The final proof for DNA as the genetic material came from the experiments of

A) Hargobind Khorana

B) Griffith

C) Hershey and Chase

D) Avery, Mcleod and McCarty

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• question_answer92) Spliceosomes are not found in cells of

A) Bacteria

B) Plants

C) Fungi

D) Animals

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• question_answer93) The pivot joint between atlas and axis is a type of

A) Saddle joint

B) Fibrous joint

C) Cartilaginous joint

D) Synovial joint

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• question_answer94) The association of histone H1 with a nucleosome indicates:

A) The DNA double helix is exposed

B) Transcription is occurring

C) DNA replication is occurring

D) The DNA is condensed into a Chromatin Fibre

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• question_answer95) Therefore the DNA is in condensed form. Which of the following is made up of dead cells?

A) Phloem

B) Xylem parenchyma

C) Collenchyma

D) Phellem

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• question_answer96) Select the correct route for the passage of sperms in male frogs :

A) Testes$\to$Vasa efferentia$\to$Kidney$\to$ Bidder's canal $\to$ Urinogenital duct$\to$Cloaca

B) Testes$\to$Bidder's canal$\to$Kidney$\to$Vasa efferentia$\to$Urinogenital duct $\to$Cloaca

C) Testes $\to$Vasa efferentia$\to$Kidney$\to$ Seminal Vesicle $\to$Urinogenital duct $\to$Cloaca

D) Testes $\to$Vasa efferentia$\to$Bidder's canal $\to$ Ureter$\to$Cloaca

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• question_answer97) 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

A)  [b] and [c]

B)  Only [d]

C)  Only [a]

D)   [a], [c] and [d]

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• question_answer98) Homozygous purelines in cattle can be obtained by

A) Mating of individuals of different species

B) Mating of related individuals of same breed

C) Mating of unrelated individuals of same breed

D) Mating of individuals of different breed

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• question_answer99) A temporary endocrine gland in the human body is

A) Corpus allatum

B) Pineal gland

C) Corpus cardiacum

D) Corpus luteum

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• question_answer100) Viroids differ from viruses in having :

A) RNA molecules without protein coat

B) DNA molecules with protein coat

C) DNA molecules without protein coat

D) RNA molecules with protein coat

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• question_answer101) A decrease in blood pressure/volume will not cause the release of

A) ADH

B) Renin

C) Atrial Natriuretic Factor

D) Aldosterone

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• question_answer102) An example of colonial alga is

A) Spirogyra

B) Chlorella

C) Volvox

D) Ulothrix

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• question_answer103) The morphological nature of the edible part of coconut is

A) Pericarp

B) Perisperm

C) Cotyledon

D) Endosperm

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• question_answer104) Which of the following is correctly matched for the product produced by them?

A) Saccharomyces cerevisiae : Ethanol

B) Acetobacter aceti : Antibiotics

C) Methanobacterium : Lactic acid

D) Penicillium notatum : Acetic acid

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• question_answer105) Match the following sexually transmitted diseases (Column - I) with their causative agent (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

A) A-iv B-iii C-ii D-i

B) A-ii B-iii C-iv D-i

C) A-iii B-iv C-i D-ii

D) A-iv B-ii C-iii D-i

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• question_answer106) In case of poriferans the spongocoel is lined with flagellated cells called :

A) Mesenchymal cells

B) Ostia

C) Oscula

D) Choanocytes

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• question_answer107) Among the following characters, which one was not considered by Mendel in his experiments on pea?

A)  Pod - Inflated or Constricted

B) Stem - Tall or Dwarf

C) Trichomes - Glandular or non-glandular

D) Seed - Green or Yellow

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• question_answer108) Identify the wrong statement in context of heartwood.

A) It comprises dead elements with highly lignified walls

B) Organic compounds are deposited in it

C) It is highly durable

D) It conducts water and minerals efficiently

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• question_answer109) During DNA replication, Okazaki fragments are used to enlongate

A) The lagging strand away from the replication fork

B) The leading strand towards replication fork

C) The lagging strand towards replication fork

D) The leading strand away from replication fork

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• question_answer110) Mycorrhizae are the example of

A) Mutualism

B) Fungistasis

C) Amensalism

D) Antibiosis

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• question_answer111) Which of the following RNAs should be most abundant in animal cell?

A) mi-RNA

B) r-RNA

C) t-RNA

D) m-RNA

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• question_answer112) The process of separation and purification of expressed protein before marketing is called

A) Postproduction processing

B) Upstream processing

C) Downstream processing

D) Bioprocessing

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• question_answer113) 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?

A) Nostoc

B) Bacillus

C) Pseudomonas

D) Mycoplasma

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• question_answer114) Which of the following components provides sticky character to the bacterial cell?

A) Glycocalyx

B) Cell wall

C) Nuclear membrane

D) Plasma membrane

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• question_answer115) With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

A) Tomato is a greenhouse crop which can be grown in $C{{O}_{2}}-$enriched atmosphere for higher yield

B) Light saturation for$C{{O}_{2}}$ fixation occurs at 10% of full sunlight

C) Increasing atmospheric $C{{O}_{2}}$ concentration upto 0.05% can enhance $C{{O}_{2}}$ fixation rate

D) ${{C}_{3}}$ plants responds to higher temperatures with enhanced photosynthesis while ${{C}_{4}}$ plants have much lower temperature optimum

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• question_answer116) Which of the following options best represents the enzyme composition of pancreatic juice?

A) Lipase, amylase, trypsinogen, procarboxy-peptidase

B) Amylase, peptidase, trypsinogen, rennin

C) Amylase, pepsin, trypsinogen, maltase

D) Peptidase, amylase, pepsin, rennin

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• question_answer117) Which one of the following statements is correct, with reference to enzymes?

A) Holoenzyme = Coenzyme + Cofactor

B) Apoenzyme = Holoenzyme + Coenzyme

C) Holoenzyme = Apoenzyme + Coenzyme

D) Coenzyme = Apoenzyme + Holoenzyme

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• question_answer118) 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?

A) 333

B) 1

C) 11

D) 33

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• question_answer119) Asymptote in a logistic growth curve is obtained when

A) K < N

B) The value of 'r' approaches zero

C) K = N

D) K > N

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• question_answer120) Select the mismatch:

A)  Equisetum - Homosporous

B)  Pinus - Dioecious

C)  Cycas - Dioecious

D) Salvinia - Heterosporous

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• question_answer121) 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?

A) Recombination of chromosome arms will occur

B) Chromosomes will not condense

C) Chromosomes will be fragmented

D) Chromosomes will not segregate

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• question_answer122) Which ecosystem has the maximum biomass?

A) Lake ecosystem

B) Forest ecosystem

C) Grassland ecosystem

D) Pond ecosystem

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• question_answer123) Zygotic meiosis is characterstic of

A) Chlamydomonas

B) Marchantia

C) Fucus

D) Funaria

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• question_answer124) Hypersecretion of Growth Hormone in adults does not cause further increase in height, because

A) Muscle fibres do not grow in size after birth

B) Growth Hormone becomes inactive in adults

C) Epiphyseal plates close after adolescence

D) Bones loose their sensitivity to Growth Hormone in adults

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• question_answer125) Frog's heart when taken out of the body continues to beat for some time 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:

A) [c] & [d]

B) Only [c]

C) Only [d]

D) [a] & [b]

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• question_answer126) 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?

A) Physiological immune response

B) Autoimmune response

C) Cell-mediated immune response

D) Hormonal immune response

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• question_answer127) Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.

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

B) Both are due to a qualitative defect in globin chain synthesis

C) Both are due to a quantitative defect in globin chain synthesis

D) Thalassemia is due to less synthesis of globin molecules

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• question_answer128) An important characteristic that Hemichordates share with Chordates is

A) Pharynx without gill slits

B) Absence of notochord

C) Ventral tubular nerve cord

D) Pharynx with gill slits

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• question_answer129) Double fertilization is exhibited by

A) Angiosperms

B) Gymnosperms

C) Algae

D) Fungi

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• question_answer130) Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?

A) Mitochondrion

B) Lysosome

C) Ribosome

D) Chloroplast

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• question_answer131) Lungs are made up of air-filled sacs the alveoli. They do not collapse even after forceful expiration, because of:

A) Expiratory Reserve Volume

B) Residual Volume

C) Inspiratory Reserve Volume

D) Tidal Volume

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• question_answer132) Which of the following are not polymeric?

A) Lipids

B) Nucleic acids

C) Proteins

D) Polysaccharides

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• question_answer133) Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by

A) Bat

B) Water

C) Bee

D) Wind

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• question_answer134) Life cycle of Ectocarpus and Fucus respectively are

A) Haplodiplontic, Haplontic

B) Haplontic, Diplontic

C) Diplontic, Haplodiplontic

D) Haplodiplontic, Diplontic

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• question_answer135) Presence of plants arranged into well-defined vertical layers depending on their height can be seen best in :

A) Temperate Forest

B) Tropical Savannah

C) Tropical Rain Forest

D) Grassland

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• question_answer136) Phosphonol pyruvate (PEP) is the primary $C{{O}_{2}}$ acceptor in :

A) ${{C}_{3}}$and ${{C}_{4}}$plants

B) ${{C}_{3}}$plants

C) ${{C}_{4}}$plants

D) ${{C}_{2}}$plants

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• question_answer137) 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 photo pigments
Options:

A) [b], [c] & [d]

B) [a] & [b]

C) [a], [c] & [d]

D) [a] & [c]

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• question_answer138) Which one from those given below is the period for Mendel's hybridization experiments?

A)  1870 - 1877

B)  1856 - 1863

C)  1840 - 1850

D)  1857 - 1869

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• question_answer139) Select the mismatch :

A)  Rhizobium - Alfalfa

B)  Frankia - Alnus

C)  Rhodospirillum - Mycorrhiza

D)   Anabaena - Nitrogen fixer

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• question_answer140) Attractants and rewards are required for

A) Cleistogamy

B) Anemophily

C) Entomophily

D) Hydrophily

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• question_answer141) In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilisation?

A) Intra cytoplasmic sperm injection

B) Intrauterine transfer

C) Gamete intra cytoplasmic fallopian transfer

D) Artificial Insemination

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• question_answer142) Which among these is the correct combination of aquatic mammals?

A) Trygon, Whales, Seals

B) Seals, Dolphins, Sharks

C) Dolphins, Seals, Trygon

D) Whales, Dolphins Seals

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• question_answer143) Functional megaspore in an angiosperm develops into

A) Embryo

B) Ovule

C) Endosperm

D) Embryo sac

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• question_answer144) Root hairs develop from the region of

A) Meristematic activity

B) Maturation

C) Elongation

D) Root cap

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• question_answer145) A dioecious flowering plant prevents both:

A) Cleistogamy and xenogamy

B) Autogamy and xenogamy

C) Autogamy and geitonogamy

D) Geitonogamy and xenogamy

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• question_answer146) The hepatic portal vein drains blood to liver from

A) Intestine

B) Heart

C) Stomach

D) Kidneys

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• question_answer147) What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis?

A) Negatively charged fragments do not move

B) The larger the fragment size, the farther it moves

C) The smaller the fragment size, the farther it moves

D) Positively charged fragments move to farther end

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• question_answer148) Which of the following represents order of 'Horse'?

A) Ferus

B) Equidae

C) Perissodactyla

D) Caballus

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• question_answer149) Which statement is wrong for Krebs' cycle?

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

B) There are three points in the cycle where $NA{{D}^{+}}$is reduced to $NADH+{{H}^{+}}$

C) There is one point in the cycle where $FA{{D}^{+}}$is reduced to $FAD{{H}_{2}}$

D) During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesized

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• question_answer150) Artificial selection to obtain cows yielding higher milk output represents

A) Stabilizing followed by disruptive as it stabilizes the population to produce higher yielding cows

B) Stabilizing selection as it stabilizes this character in the population

C) Directional as it pushes the mean of the character in one direction

D) Disruptive as it splits the population into two one yielding higher output and the other lower output

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• question_answer151) The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as

A) Restoration zone

B) Core zone

C) Buffer zone

D) Transition zone

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• question_answer152) Receptor sites for neurotransmitters are present on

A) Post-synaptic membrane

B) Membranes of synaptic vesicles

C) Pre-synaptic membrane

D) Tips of axons

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• question_answer153) The vascular cambium normally gives rise to

A) Periderm

B) Phelloderm

C) Primary phloem

D) Secondary xylem

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• question_answer154) 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?

A) Molars

B) Incisors

C) Canines

D) Pre-molars

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• question_answer155) The water potential of pure water is

A) More than one

B) Zero

C) Less than zero

D) More than zero but less than one

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• question_answer156) DNA fragments are

A) Either positively or negatively charged depending on their size

B) Positively charged

C) Negatively charged

D) Neutral

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• question_answer157) Capacitation occurs in

A) Female Reproductive tract

B) Rete testis

C) Epididymis

D) Vas deferens

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• question_answer158) The function of copper ions in copper releasing IUD's is :

A) They inhibit ovulation

B) They suppress sperm motility and fertilizing capacity of sperms

C) They inhibit gametogenesis

D) They make uterus unsuitable for implantation

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• question_answer159) A gene whose expression helps to identify transformed cell is known as

A) Structural gene

B) Selectable marker

C) Vector

D) Plasmid

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• question_answer160) Which one of the following statements is not valid for aerosols?

A) They have negative impact on agricultural land

B) They are harmful to human health

C) They alter rainfall and monsoon patterns

D) They cause increased agricultural productivity

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• question_answer161) Which of the following statements is correct?

A) The descending limb of loop of Henle is permeable to electrolytes

B) The ascending limb of loop of Henle is impermeable to water

C) The descending limb of loop of Henle is impermeable to water

D) The ascending limb of loop of Henle is permeable to water

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• question_answer162) Which of the following in sewage treatment removes suspended solids?

A) Sludge treatment

B) Tertiary treatment

C) Secondary treatment

D) Primary treatment

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• question_answer163) GnRH, a hypothalamic hormone, needed in reproduction, acts on

A) Posterior pituitary gland and stimulates secretion of LH and relaxin

B) Anterior pituitary gland and stimulates secretion of LH and oxytocin

C) Anterior pituitary gland and stimulates secretion of LH and FSH

D) Posterior pituitary gland and stimulates secretion of oxytocin and FSH

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• question_answer164) Which of the following facilitates opening of stomatal aperture?

A) Longitudinal orientation of cellulose micro fibrils in the cell wall of guard cells

B) Contraction of outer wall of guard cells

C) Decrease in turgidity of guard cells

D) Radial orientation of cellulose micro fibrils in the cell wall of guard cells

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• question_answer165) The genotypes of a Husband and Wife are ${{|}^{A}}{{|}^{B}}$and${{|}^{A}}|.$ Among the blood types of their children, how many different genotypes and phenotypes are possible?

A) 4 genotypes ; 4 phenotypes

B) 3 genotypes ; 3 phenotypes

C) 3 genotypes ; 4 phenotypes

D) 4 genotypes ; 3 phenotypes

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• question_answer166) Plants which produce characterstic pneumatophores and show vivipary belong to

A) Hydrophytes

B) Mesophytes

C) Halophytes

D) Psammophytes

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• question_answer167) Alexander Von Humboldt described for the first time

A) Population Growth equation

B) Ecological Biodiversity

C) Laws of limiting factor

D) Species area relationships

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• question_answer168) DNA replication in bacteria occurs

A) Just before transcription

B) During S-phase

C) Within nucleolus

D) Prior to fission

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• question_answer169) MALT constitutes about------------ percent of the lymphoid tissue in human body

A) 10%

B) 50%

C) 20%

D) 70%

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• question_answer170) In Bougainvillea thorns are the modifications of

A) Leaf

B) Stipules

C) Adventitious root

D) Stem

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• question_answer171) Fruit and leaf drop at early stages can be prevented by the application of

A) Gibberellic acid

B) Cytokinins

C) Ethylene

D) Auxins

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• question_answer172) Which of the following are found in extreme saline conditions?

A) Mycobacteria

B) Archaebacteria

C) Eubacteria

D) Cyanobacteria

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• question_answer173) Coconut fruit is a

A) Capsule

B) Drupe

C) Berry

D) Nut

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• question_answer174) The DNA fragments separated on an agarose gel can be visualised after staining with

A) Ethidium bromide

B) Bromophenol blue

C) Acetocarmine

D) Aniline blue

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• question_answer175) 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 :

A)

 X = 24, Y = 12 True ribs are dorsally attached to vertebral column but are free on ventral side

B)

 X = 12, Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum

C)

 X = 12, Y = 5 True ribs are attached dorsally to vertebral column and sternum on the two ends

D)

 X = 24, Y = 7 True ribs are dorsally attached to vertebral column but are free on ventral side

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• question_answer176) Myelin sheath is produced by

A) Osteoclasts and Astrocytes

B) Schwann Cells and Oligodendrocytes

C) Astrocytes and Schwann Cells

D) Oligodendrocytes and Osteoclasts

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• question_answer177) Which of the following options gives the correct sequence of events during mitosis?

A) Condensation$\to$arrangement at equator $\to$centromere division$\to$segregation$\to$ telophase

B) Condensation$\to$nuclear membrane disassembly$\to$crossing over$\to$segregation$\to$ telophase

C) Condensation$\to$nuclear membrane disassembly$\to$arrangement at equator$\to$ centromere division$\to$segregation$\to$ telophase

D) Condensation $\to$crossing over $\to$nuclear membrane disassembly$\to$segregation $\to$ telophase

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• question_answer178) A disease caused by an autosomal primary non-disjunction is

A) Sickle cell anemia

B) Down's syndrome

C) Klinefelter's syndrome

D) Turner's syndrome

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• question_answer179) Which cells of 'Crypts of Lieberkuhn' secrete antibacterial lysozyme?

A) Kupffer cells

B) Argentaffin cells

C) Paneth cells

D) Zymogen cells

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• question_answer180) Which one of the following is related to Ex-situ conservation of threatened animals and plants?

A) Himalayan region

B) Wildlife Safari parks

C) Biodiversity hot spots

D) Amazon rainforest

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