# Solved papers for NEET AIPMT SOLVED PAPER 2000

### done AIPMT SOLVED PAPER 2000

• question_answer1) A pair of physical quantities having same dimensional formula is:

A) force and torque

B) Work and energy

C) force and impulse

D) linear momentum and angular momentum

• question_answer2) An engine exerts a force $\vec{F}=(20\hat{i}-3\hat{j}+5\hat{k})N$and moves with velocity $\vec{v}=(6\hat{j}+20\hat{j}-3\hat{k})\,m/s$. The power of the engine (in watt) is:

A) 45

B) 75

C) 20

D) 10

• question_answer3) Two particles are projected with same initial velocities at an angle ${{30}^{\text{o}}}$ and ${{60}^{\text{o}}}$ with the horizontal. Then:

A) their heights will be equal

B) their ranges will be equal

C) their time of flights will be equal

D) their ranges will be different

• question_answer4) A ball of mass 3 kg moving with a speed of 100 m/s, strikes a wall at an angle ${{60}^{\text{o}}}$ (as shown in figure). The ball rebounds at the same speed and remains in contact with the ball for 0.2 s, the force exerted by the ball on the wall is:

A) $1500\sqrt{3}\,N$

B) 1500 N

C) $300\,\sqrt{3}\,N$

D) 300 N

• question_answer5) Two masses ${{M}_{1}}=5\,\,kg,\,\,{{M}_{2}}=10\,kg$ are connected at the ends of an inextensible string passing over a frictionless pulley as shown. When masses are released, then acceleration of masses will be:

A) g

B) $\frac{g}{2}$

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

D) $\frac{g}{4}$

• question_answer6) A particle moves along a straight line such that its displacement at any time t is given by $s=3{{t}^{3}}+7{{t}^{2}}+14t+5$. The acceleration of the particle at t = 1 s is:

A) $18\,\,m/{{s}^{2}}$

B) $32\,\,m/{{s}^{2}}$

C) $29\,m/{{s}^{2}}$

D) $24\,\,m/{{s}^{2}}$

• question_answer7) A boat which has a speed of 5 km/h in still water crosses a river of width 1 km along the shortest possible path in 15 min. The velocity of the river water in km/h is:

A) 1

B) 3

C) 4

D) $\sqrt{41}$

• question_answer8) A particle of mass 1 kg is thrown vertically upwards with speed 100 m/s. After 5 s it explodes into two parts. One part of mass 400 g comes back with speed 25 m/s, what is the speed of other part just after explosion?

A) 100 m/s upward

B) 600 m/s upward

C) 100 m/s downward

D) 300 m/s upward

• question_answer9) A stone is attached to one end of a string and rotated in a vertical circle. If string breaks at the position of maximum tension, it will break at:

A) A

B) B

C) C

D) D

• question_answer10) A solid sphere and a hollow sphere are thrown horizontally from a cliff with equal velocities, respectively. Then which sphere reaches first on earth?

A) Solid sphere

B) Hollow sphere

C) Both sphere simultaneously

D) We cannot say because masses of spheres are not given

• question_answer11) Escape velocity from earth is 11.2 km/s. Another planet of same mass has radius 1/4 times that of earth. What is the escape velocity from another planet?

A) 11.2 km/s

B) 44.8 km/s

C) 22.4 km/s

D) 5.6 km/s

• question_answer12) ABC is a right angled triangular plate of uniform thickness. The sides are such that AB > BC as shown in figure. ${{I}_{1}},\,{{I}_{2}},\,{{I}_{3}}$ are moments of inertia about AB, BC and AC respectively. Then which of the following relations is correct?

A) ${{I}_{1}}={{I}_{2}}={{I}_{3}}$

B) ${{I}_{2}}>{{I}_{1}}>{{I}_{3}}$

C) ${{I}_{3}}<{{I}_{2}}<{{I}_{1}}$

D) ${{I}_{3}}>{{I}_{1}}>{{I}_{2}}$

• question_answer13) A gas is formed of molecules each molecule possessing $f$ degrees of freedom, then the value of $\gamma =\frac{{{C}_{P}}}{{{C}_{V}}}$ is equal to:

A) $\frac{2}{f}$

B) $1+\frac{2}{f}$

C) $1+\frac{f}{2}$

D) $f+\frac{1}{2}$

• question_answer14) A pendulum is displaced to an angle $\theta$ from its equilibrium position; then it will pass through its mean position with a velocity v equal to:

A) $\sqrt{2gl}$

B) $\sqrt{2gl\sin \theta }$

C) $\sqrt{2gl\cos \theta }$

D) $\sqrt{2gl\,\,(1-\cos \theta )}$

• question_answer15) An engine takes heat from a reservoir and converts its 1/6 part into work. By decreasing temperature of sink by ${{62}^{\text{o}}}C,$ its efficiency becomes double. The temperatures of source and sink must be:

A) ${{90}^{\text{o}}}C,\,{{37}^{\text{o}}}C$

B) ${{99}^{\text{o}}}C,\,{{37}^{\text{o}}}C$

C) ${{372}^{\text{o}}}C,\,{{37}^{\text{o}}}C$

D) ${{206}^{\text{o}}}C,\,{{37}^{\text{o}}}C$

• question_answer16) Two sources are at a finite distance apart. They emit sounds of wavelength $\lambda$. An observer situated between them on line joining approaches one source with speed $u$. Then the number of beats heard/s by observer will be:

A) $\frac{2u}{\lambda }$

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

C) $\frac{u}{2\lambda }$

D) $\frac{\lambda }{u}$

• question_answer17) Rainbows are formed by:

A) reflection and diffraction

B) refraction and scattering

C) dispersion and total internal reflection

D) interference only

• question_answer18) A man is 6 feet tall. In order to see his entire image, he requires a plane mirror of minimum length equal to:

A) 6 ft

B) 12 ft

C) 2 ft

D) 3 ft

• question_answer19) Two simple harmonic motions given by $x=A\sin (\omega t+\delta )$ and $y=A\,\sin \left( \omega t+\delta +\frac{\pi }{2} \right)$ act on a particle simultaneously; then the motion of particle will be:

A) circular anti-clockwise

B) circular clockwise

C) elliptical anti-clockwise

D) elliptical clockwise

• question_answer20) A plano-convex lens is made of a material of refractive index $\mu =1.5$. The radius of curvature of curved surface of the lens is 20 cm. If its plane surface is silvered, the focal length of the silvered lens will be:

A) 10 cm

B) 20 cm

C) 40 cm

D) 80 cm

• question_answer21) Two wires are held perpendicular to the plane of paper at 5 m apart. They carry currents of 2.5 A and 5 A in same direction. Then the magnetic field strength (b) at a point midway between the wires will be:

A) $\frac{{{\mu }_{0}}}{4\pi }T$

B) $\frac{{{\mu }_{0}}}{2\pi }T$

C) $\frac{3{{\mu }_{0}}}{2\pi }T$

D) $\frac{3{{\mu }_{0}}}{4\pi }T$

• question_answer22) A capacitor is charged by connecting a battery across its plates. It stores energy U. Now the battery is disconnected and another identical capacitor is connected across it, then the energy stored by both capacitors of the system will be:

A) U

B) $\frac{U}{2}$

C) 2U

D) $\frac{3}{2}U$

• question_answer23) A bridge circuit is shown in figure the equivalent resistance between A and B will be:

A) $21\,\Omega$

B) $7\Omega$

C) $\frac{252}{85}\Omega$

D) $\frac{14}{3}\Omega$

• question_answer24) Two bulbs 25 W, 220 V and 100 W, 220 V are given. Which has higher resistance?

A) 25 W bulb

B) 100 W bulb

C) Both bulbs will have equal resistance

D) Resistance of bulbs cannot be compared

• question_answer25) An electron moves with a velocity $1\times {{10}^{3}}\,m/s$ in a magnetic field of induction 0.3 T at an angle ${{30}^{o}}$. If $\frac{e}{m}$ of electron is $1.76\times {{10}^{11}}\,C/kg$ the radius of the path is nearly:

A) ${{10}^{-8}}\,m$

B) $2\times {{10}^{-8}}\,m$

C) ${{10}^{-6}}\,m$

D) ${{10}^{-10}}\,m$

• question_answer26) A charged wire is bent in the form of a semi-circular arc of radius a. If charge per unit length is $\lambda$ coulomb/metre, the electric field at the centre O is:

A) $\frac{\lambda }{2\pi {{a}^{2}}{{\varepsilon }_{0}}}$

B) $\frac{\lambda }{4{{\pi }^{2}}{{\varepsilon }_{0}}a}$

C) $\frac{\lambda }{2{{\pi }^{2}}{{\varepsilon }_{0}}a}$

D) zero

• question_answer27) Potentiometer measures the potential difference more accurately than a voltmeter because:

A) it has a wire of high resistance

B) it has a wire of low resistance

C) it does not draw current from external circuit

D) it draws a heavy current from external circuit

• question_answer28) In electrolysis the mass deposited on an electrode is directly proportional to:

A) current

B) square of current

C) concentration of solution

D) inverse of current

• question_answer29) The frequency of $\gamma -rays,$ X-rays and ultraviolet rays are a, b and c respectively. Then:

A) $a>b>c$

B) $a<b<c$

C) $a=b=c$

D) $a>c>b$

• question_answer30) A wire of resistance R is connected in series with an inductor of reactance $\omega L$. Then quality factor of RL circuit is:

A) $\frac{R}{\omega L}$

B) $\frac{\omega L}{R}$

C) $\frac{R}{\sqrt{{{R}^{2}}+{{\omega }^{2}}{{L}^{2}}}}$

D) $\frac{\omega L}{\sqrt{{{R}^{2}}+{{\omega }^{2}}{{L}^{2}}}}$

• question_answer31) Einstein's work on photoelectric effect gives support to:

A) $E=m{{c}^{2}}$

B) E = hv

C) $hv=\frac{1}{2}m{{v}^{2}}$

D) $E=\frac{h}{\lambda }$

• question_answer32) Nuclear fission can be explained by:

A) proton-proton cycle

B) liquid drop model of nucleus

C) independent of nuclear particle model

D) nuclear shell model

• question_answer33) When electron jumps from n = 4 to n = 2 orbit, we get:

A) second line of Lyman series

B) second line of Balmer series

C) second line of Paschen series

D) an absorption line of Balmer series

• question_answer34) Which of the following transitions gives photon of maximum energy?

A) n = 1 to n = 2

B) n = 2 to n = 1

C) n = 2 to n = 6

D) n = 6 to n = 2

• question_answer35) The relationship between disintegration constant $(\lambda )$ and half-life $(T)$ will be:

A) $\lambda =\frac{{{\log }_{10}}2}{T}$

B) $\lambda =\frac{{{\log }_{e}}2}{T}$

C) $\lambda =\frac{T}{{{\log }_{e}}2}$

D) $\lambda =\frac{{{\log }_{2}}e}{T}$

• question_answer36) The half-life of a radioactive material is 3 h. If the initial amount is 300 g, then after 18 h, it will remain:

A) 4.68 g

B) 46.8 g

C) 9.375 g

D) 93.75 g

• question_answer37) A nuclear decay is expressed as $_{6}{{C}^{11}}\to {{\,}_{5}}{{B}^{11}}+\,{{\beta }^{+}}+X$ Then the unknown particle X is:

A) neutron

B) antineutrino

C) proton

D) neutrino

• question_answer38) If $\alpha$ and $\beta$ are current gains in common-base and common-emitter configurations of a transistor, then $\beta$ is equal to:

A) $\frac{1}{\alpha }$

B) $\frac{\alpha }{1+\alpha }$

C) $\frac{\alpha }{1-\alpha }$

D) $\alpha -\frac{1}{\alpha }$

• question_answer39) The truth table given below:

 Inputs Output A B Y 0 0 0 1 0 0 0 1 0 1 1 1
represents:

A) AND gate

B) NOR gate

C) OR gate

D) NAND gate

• question_answer40) The gases carbon-monoxide (CO) and nitrogen at the same temperature have kinetic energies ${{E}_{1}}$ and ${{E}_{2}}$ respectively. Then:

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

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

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

D) ${{E}_{1}}$ and ${{E}_{2}}$ cannot be compared

• question_answer41) A sonometer wire when vibrated in full length has frequency n. Now it is divided by the help of bridges into a number of segments of lengths ${{l}_{1}},\,{{l}_{2}},\,{{l}_{3}}...$. When vibrated these segments have frequencies ${{n}_{1}},\,{{n}_{2}},\,{{n}_{3}},....$then the correct relation is:

A) $n={{n}_{1}}+{{n}_{2}}+{{n}_{3}}+...$

B) ${{n}^{2}}=n_{1}^{2}+n_{2}^{2}+n_{3}^{2}+...$

C) $\frac{1}{n}=\frac{1}{{{n}_{1}}}+\frac{1}{{{n}_{2}}}+\frac{1}{{{n}_{3}}}+...$

D) $\frac{1}{\sqrt{n}}=\frac{1}{\sqrt{{{n}_{1}}}}+\frac{1}{\sqrt{{{n}_{2}}}}+\frac{1}{\sqrt{{{n}_{3}}}}+...$

• question_answer42) In which of the following figures, junction diode is forward biased?

A)

B)

C)

D)

• question_answer43) The energy of a photon of light is 3 eV. Then the wavelength of photon must be:

A) 4125 nm

B) 412.5 nm

C) 41250 nm

D) 4 nm

• question_answer44) A body has a weight 72 N. When it is taken to a height $h=R$ (radius of earth), it would weigh:

A) 72 N

B) 36 N

C) 18 N

D) zero

• question_answer45) A cell has an emf 1.5 V. When connected across an external resistance of $2\,\Omega$, the terminal potential difference falls to 1.0 V. The internal resistance of the cell is:

A) $2\,\Omega$

B) $1.5\,\Omega$

C) $1.0\,\Omega$

D) $0.5\,\Omega$

• question_answer46) A charge q is placed at the corner of a cube of side $a$. The electric flux through the cube is:

A) $\frac{q}{{{\varepsilon }_{0}}}$

B) $\frac{q}{3{{\varepsilon }_{0}}}$

C) $\frac{q}{6\,{{\varepsilon }_{0}}}$

D) $\frac{q}{8\,{{\varepsilon }_{0}}}$

• question_answer47) A man goes at the top of a smooth inclined plane. He releases a bag to fall freely and he himself slides on inclined plane to reach the bottom. If ${{v}_{1}}$ and ${{v}_{2}}$ are the velocities of the man and bag respectively, then:

A) ${{v}_{1}}>{{v}_{2}}$

B) ${{v}_{1}}<{{v}_{2}}$

C) ${{v}_{1}}={{v}_{2}}$

D) ${{v}_{1}}$ and ${{v}_{2}}$ cannot be compared

• question_answer48) A transparent cube contains a small air bubble. Its apparent distance is 2 cm when seen through one face and 5 cm when seen through other face. If the refractive index of the material of the cube is 1.5, the real length of the edge of cube must be:

A) 7 cm

B) 7.5 cm

C) 10.5 cm

D) $\frac{14}{3}$cm

• question_answer49) Which one of the following processes depends on gravity?

A) Conduction

B) Convection

D) None

• question_answer50) Two strings A and B have lengths ${{l}_{A}}$ and ${{l}_{B}}$ and carry masses ${{M}_{A}}$ and ${{M}_{B}}$ at their lower ends, the upper ends being supported by rigid supports. If ${{n}_{A}}$ and ${{n}_{B}}$ are their frequencies of their vibrations and ${{n}_{A}}=2{{n}_{B}},$ then:

A) ${{l}_{A}}=4{{l}_{B}}$, regardless of masses

B) ${{l}_{B}}=4{{l}_{A}}$, regardless of masses

C) ${{M}_{A}}=2{{M}_{B}},\,{{l}_{A}}=2{{l}_{B}}$

D) ${{M}_{B}}=2{{M}_{A}},\,{{l}_{B}}=2{{l}_{A}}$

• question_answer51) The energy of photon is given as: $\Delta e$/atom = $3.03\times {{10}^{-19}}\,J\,ato{{m}^{-1}}$ then, the wavelength $(\lambda )$ of the photon is:

A) 6.56 nm

B) 65.6 nm

C) 656 nm

D) 0,656 nm (Given, h(Planck's constant) $=6.63\,\times {{10}^{-34}}\,J-s,$ c(velocity of light) $=3.00\,\times {{10}^{8}}\,m{{s}^{-1}}$)

• question_answer52) Which one of the following is planar?

A) $Xe{{F}_{4}}$

B) $Xe{{O}_{4}}$

C) $Xe{{O}_{3}}F$ $Xe{{O}_{3}}F$

D) $Xe{{O}_{3}}{{F}_{2}}$

• question_answer53) The conjugate acid of $NH_{2}^{-}$ is:

A) ${{N}_{2}}{{H}_{4}}$

B) $NH_{4}^{+}$

C) $N{{H}_{2}}OH$

D) $N{{H}_{3}}$

• question_answer54) The equivalent conductances of $B{{a}^{2+}}$ and $C{{l}^{-}}$ are 127 and 76 $oh{{m}^{-1}}\,\,c{{m}^{-1}}\,e{{q}^{-1}}$ respectively at infinite dilution. The equivalent conductance of $BaC{{l}_{2}}$ at infinite dilution will be:

A) 139.5

B) 203

C) 279

D) 101.5

• question_answer55) If $\Delta E$ is the heat of reaction for ${{C}_{2}}{{H}_{5}}OH(l)+3{{O}_{2}}(g)\xrightarrow{{}}2C{{O}_{2}}(g)+3{{H}_{2}}O(l)$ at constant volume, the $\Delta H$ (heat of reaction at constant pressure) at constant temperature is:

A) $\Delta H=\Delta E+RT$

B) $\Delta H=\Delta E-RT$

C) $\Delta H=\Delta E-2RT$

D) $\Delta H=\Delta E+2RT$

• question_answer56) For a reversible reaction, if the concentrations of the reactants are doubled, the equilibrium constant will be:

A) one-fourth

B) halved

C) doubled

D) the same

• question_answer57) The entropy change in the fusion of one mole of a solid melting at ${{27}^{o}}C$ (Latent heat of fusion, $2930\,\,J\,mo{{l}^{-1}}$) is:

A) $9.77\,\,J\,{{K}^{-1}}\,mo{{l}^{-1}}$

B) $10.73\,\,J\,{{K}^{-1}}\,mo{{l}^{-1}}$

C) $2930\,\,J\,{{K}^{-1}}\,mo{{l}^{-1}}$

D) $108.5\,\,J\,{{K}^{-1}}\,mo{{l}^{-1}}$

• question_answer58) The half-life of a radioactive isotope is three hours. If the initial mass of the isotope was 300g, the mass which remained undecayed after 18 hours would be:

A) 4.68 g

B) 2.34 g

C) 1.17 g

D) 9.36 g

• question_answer59) Cell reaction is spontaneous when:

A) $E_{red}^{o}$ is negative

B) $E_{red}^{o}$ is positive

C) $\Delta {{G}^{o}}$ is negative

D) $\Delta {{G}^{o}}$is positive

• question_answer60) $C{{u}^{+}}(aq)$ is unstable in solution and undergoes simultaneous oxidation and reduction according to the reaction: $2C{{u}^{+}}(aq)C{{u}^{2+}}(aq)+Cu(s)$ choose correct ${{E}^{o}}$ for above reaction if $E_{C{{u}^{2+}}/Cu}^{0}=0.34\,V$ and $E_{C{{u}^{2+}}/C{{u}^{+}}}^{0}=0.15\,V$

A) - 0.38 V

B) + 0.49 V

C) + 0.38 V

D) - 0.19 V

• question_answer61) Which of the following expressions correctly represents the relationship between the average molar kinetic energy, $\overline{KE}$, of CO and ${{N}_{2}}$ molecules at the same temperature ?

A) ${{\overline{KE}}_{CO}}\,<{{\overline{KE}}_{{{N}_{2}}}}$

B) ${{\overline{KE}}_{CO}}\,>{{\overline{KE}}_{{{N}_{2}}}}$

C) ${{\overline{KE}}_{CO}}={{\overline{KE}}_{{{N}_{2}}}}$

D) Cannot be predicted unless volumes of die gases are given

• question_answer62) Which of the following statements about pH and ${{H}^{+}}$ ion concentration is incorrect?

A) Addition of one drop of concentrated HCl in $N{{H}_{4}}OH$ solution decreases pH of the solution

B) A solution of the mixture of one equivalent of each of $C{{H}_{3}}COOH$ and NaOH has a pH of 7

C) pH of pure neutral water is not zero

D) A cold and cone. ${{H}_{2}}S{{O}_{4}}$ has lower ${{H}^{+}}$ ion concentration than a dilute solution of ${{H}_{2}}S{{O}_{4}}$

• question_answer63) Which one of the following is true for any diprotic acid, ${{H}_{2}}X$?

A) ${{K}_{{{a}_{2}}}}={{K}_{{{a}_{1}}}}$

B) ${{K}_{{{a}_{2}}}}>{{K}_{{{a}_{1}}}}$

C) ${{K}_{{{a}_{2}}}}<{{K}_{{{a}_{1}}}}$

D) ${{K}_{{{a}_{2}}}}=\frac{1}{K{{a}_{1}}}$

• question_answer64) Which one of the following molecules will form a linear polymeric structure due to hydrogen bonding?

A) $N{{H}_{3}}$

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

C) HCl

D) HF

• question_answer65) In the following reaction, how is the rate of appearance of the underlined product related to the rate of disappearance of the underlined reactant? $BrO_{3}^{-}(aq)+\underline{5B{{r}^{-}}(aq)}+6{{H}^{+}}(aq)\xrightarrow{{}}\underline{3B{{r}_{2}}(l)}+3{{H}_{2}}O(l)$

A) $\frac{d[B{{r}_{2}}]}{dt}=-\frac{5}{3}\frac{d[B{{r}^{-}}]}{dt}$

B) $\frac{d[B{{r}_{2}}]}{dt}=-\frac{d[B{{r}^{-}}]}{dt}$

C) $\frac{d[B{{r}_{2}}]}{dt}=\frac{3}{5}\frac{d[B{{r}^{-}}]}{dt}$

D) $\frac{d[B{{r}_{2}}]}{dt}=-\frac{3}{5}\frac{d[B{{r}^{-}}]}{dt}$

• question_answer66) For the equilibrium $MgC{{O}_{3}}MgO(s)+C{{O}_{2}}(g)$ Which of the following expressions is correct?

A) ${{K}_{p}}={{P}_{C{{O}_{2}}}}$

B) ${{K}_{p}}=\frac{[MgO]\,[C{{O}_{2}}]}{[MgC{{O}_{3}}]}$

C) ${{K}_{p}}=\frac{{{P}_{MgO}}+{{P}_{C{{O}_{2}}}}}{{{P}_{MgC{{O}_{3}}}}}$

D) ${{K}_{p}}=\frac{{{P}_{MgO}}+{{P}_{C{{O}_{2}}}}}{{{P}_{MgC{{O}_{3}}}}}$

• question_answer67) Among the following the electron deficient compound is:

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

B) $CC{{l}_{4}}$

C) $PC{{l}_{5}}$

D) $BeC{{l}_{2}}$

• question_answer68) The method usually employed for the precipitation of a colloidal solution is:

A) dialysis

C) diffusion through animal membrane

D) condensation

• question_answer69) The relationship between the dissociation energy of N2 and $N_{2}^{+}$ is:

A) dissociation energy of $N_{2}^{+}$ > dissociation energy of $N_{2}^{+}$

B) dissociation energy of ${{N}_{2}}=$ dissociation energy of $N_{2}^{+}$

C) dissociation energy of ${{N}_{2}}>$ dissociation energy of $N_{2}^{+}$

D) dissociation energy of ${{N}_{2}}$ can either be lower or higher than the dissociation energy of $N_{2}^{+}$

• question_answer70) The factor of $\Delta G$ values is important in metallurgy. The $\Delta G$ values for the following reactions at 800?C are given as: \begin{align} & {{S}_{2}}(s)+2{{O}_{2}}(g)\to 2S{{O}_{2}}(g)\,;\,\Delta G=-544\,kJ \\ & 2Zn(s)+{{S}_{2}}O\to \,2ZnS(s)\,;\Delta G=-293kJ \\ & 2Zn(s)+{{O}_{2}}(g)\to 2ZnO(s);\Delta G=-480\,kJ \\ \end{align} Then $\Delta G$ for the reaction $2ZnS(s)+3{{O}_{2}}(g)\xrightarrow{{}}2ZnO(s)+2S{{O}_{2}}(g)$ will be:

A) -357 kJ

B) -731 kJ

C) -773 kJ

D) -229 kJ

• question_answer71) Which one of the following is not paramagnetic?

A) NO

B) $N_{2}^{+}$

C) CO

D) $O_{2}^{-}$

• question_answer72) Among the following ions the $p\pi -d\pi$ overlap could be present in:

A) $NO_{2}^{-}$

B) $NO_{3}^{-}$

C) $PO_{4}^{3-}$

D) $CO_{3}^{2-}$

• question_answer73) A compound formed by elements A and B crystallises in the cubic structure where A atoms are at the comers of a cube and B atoms are at the face centres. The formula of die compound is:

A) $A & {{ & }_{2}}{{B}_{2}}$

B) $A{{B}_{3}}$

C) AB

D) ${{A}_{3}}B$

• question_answer74) Assuming fully decomposed, the volume of $C{{O}_{2}}$ released at STP on heating 9.85g of $BaC{{O}_{3}}$ (Atomic mass, Ba = 137) will be:

A) 1.12 L

B) 0.84 L

C) 2.24 L

D) 4.06 L

• question_answer75) A compound contains atoms of three elements A, B and C. If the oxidation number of A is +2, B is +5, and that of C is -2, the possible formula of the compound is:

A) ${{A}_{2}}{{(B{{C}_{3}})}^{2}}$

B) ${{A}_{3}}{{(B{{C}_{4}})}^{2}}$

C) ${{A}_{3}}{{({{B}_{4}}C)}_{2}}$

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

• question_answer76) The correct structure of $Fe{{(CO)}_{5}}$ is:

A) trigonal bipyramidal

B) octahedral

C) tetrahedral

D) square pyramidal

• question_answer77) Which one of the following complexes will have four different isomers?

A) $[Co{{(en)}_{2}}C{{l}_{2}}]Cl$

B) $[Co(en)(N{{H}_{3}})C{{l}_{2}}]Cl$

C) $[Co{{(PP{{H}_{3}})}_{2}}(N{{H}_{3}})C{{l}_{2}}]Cl$

D) $[Co{{(en)}_{3}}]C{{l}_{3}}$

• question_answer78) Which one of the following forms a colourless solution in aqueous medium? (Atomic number: Sc = 21, Ti = 22, V = 23, Cr = 24)

A) ${{V}^{3+}}$

B) $C{{r}^{3+}}$

C) $T{{i}^{3+}}$

D) $S{{c}^{3+}}$

• question_answer79) Among die following groupings which represents the collection of isoelectronic species?

A) $NO,\,C{{N}^{-}},\,{{N}_{2}},\,O_{2}^{-}$

B) $N{{O}^{+}},\,C_{2}^{2-},\,O_{2}^{-},\,CO$

C) ${{N}_{2}},\,C_{2}^{2-},\,CO,\,NO$

D) $CO,\,N{{O}^{+}},\,C{{N}^{-}},\,C_{2}^{2-}$

• question_answer80) In the separation of $C{{u}^{2+}}$ and $C{{d}^{2+}}$ in 2nd group of qualitative analysis of cations, tetramine copper (II) sulphate and tetrammine cadmium (II) sulphate react with KCN to form the corresponding cyano complexes, which one of the following pairs of the complexes and their relative stability enables the separation of $C{{u}^{2+}}$ and $C{{d}^{2+}}$?

A) ${{K}_{3}}[Cu{{(CN)}_{4}}]$ : less stable and ${{K}_{2}}[Cd{{(CN)}_{4}}]$ : more stable

B) ${{K}_{3}}[Cu{{(CN)}_{4}}]$ : more stable and ${{K}_{2}}[Cd{{(CN)}_{4}}]$ : less stable

C) ${{K}_{2}}[Cu{{(CN)}_{4}}]$ : less stable and ${{K}_{2}}[Cd{{(CN)}_{4}}]$ : more stable

D) ${{K}_{2}}[Cu{{(CN)}_{4}}]$ : more stable and ${{K}_{2}}[Cd{{(CN)}_{4}}]$ : less stable

• question_answer81) Of the following transition metals, the maximum numbers of oxidation states are exhibited by:

A) chromium (Z = 24)

B) manganese (Z = 25)

C) iron (Z = 26)

D) titanium (Z = 22)

• question_answer82) Which one of the following has magnesium?

A) Vitamin ${{B}_{12}}$

B) Chlorophyll

C) Haemocyanin

D) Carbonic anhydrase

• question_answer83) Propan-1-ol may be prepared by reaction of propene with:

A) $C{{H}_{3}}-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-O-O-H$

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

C) ${{B}_{2}}{{H}_{6}}/NaOH-{{H}_{2}}{{O}_{2}}$

D) ${{H}_{2}}{{O}_{4}}/{{H}_{2}}O$

• question_answer84) During reduction of aldehydes with hydrazine and potassium hydroxide, the first is the formation of:

A) $R-CH=N-N{{H}_{2}}$

B) $R-C\equiv \equiv N$

C) $R-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-N{{H}_{2}}$

D) $R-CH=NH$

• question_answer85) In Friedel-Craft?s synthesis of toluene, the reactants in addition to anhydrous $AlC{{l}_{3}}$ are:

A) ${{C}_{6}}{{H}_{5}}Cl+C{{H}_{4}}$

B) ${{C}_{6}}{{H}_{5}}Cl+C{{H}_{3}}Cl$

C) ${{C}_{6}}{{H}_{6}}+C{{H}_{4}}$

D) ${{C}_{6}}{{H}_{6}}+C{{H}_{3}}Cl$

• question_answer86) $\alpha$-D(+) - glucose and $\beta$-D(+)-glucose are:

A) anomers

B) epimers

C) enantiomers

D) geometrical isomers

• question_answer87) But-2-ene exhibits cu-trans isomerism due to:

A) rotation around ${{C}_{2}}-{{C}_{3}}$ double bond

B) rotation around ${{C}_{3}}-{{C}_{4}}$ sigma bond

C) rotation around ${{C}_{1}}-{{C}_{2}}$ bond

D) restricted rotation around > C = C < bond

• question_answer88) Reduction by $LiAl{{H}_{4}}$ of hydrolysed product of an ester gives:

A) two acids

B) two aldehydes

C) one molecule of alcohol and another of carboxylic acid

D) two alcohols

• question_answer89) Polarization of electrons in acrolein may be written as:

A) $\overset{\delta +}{\mathop{C}}\,{{H}_{2}}=CH-CH=\overset{\delta -}{\mathop{O}}\,$

B) $\overset{\delta +}{\mathop{C}}\,{{H}_{2}}=\overset{\delta +}{\mathop{CH}}\,-CH=\overset{{}}{\mathop{O}}\,$

C) $\overset{\delta +}{\mathop{C}}\,{{H}_{2}}=\overset{{}}{\mathop{CH}}\,-CH=\overset{\delta +}{\mathop{O}}\,$

D) $\overset{\delta +}{\mathop{C}}\,{{H}_{2}}=\overset{{}}{\mathop{CH}}\,-\overset{\delta +\,\,}{\mathop{CH}}\,=\overset{{}}{\mathop{O}}\,$

• question_answer90) An organic compound A on reduction gives compound B which on reaction with chloroform and potassium hydroxide forms C. The compound C on catalytic reduction gives N-methylaniline. The compound A is:

A) nitrobenzene

B) nitromethane

C) methylamine

D) aniline

• question_answer91) Among the following alkenes, 1-butene cis-2-butene trans-2-2butene I II III the decreasing order of stability is:

A) II > I > III

B) III > II > I

C) III > I > II

D) I > II > III

• question_answer92) The dihedral angle between two C?H bonds in the staggered conformation of ethane is:

A) ${{60}^{\text{o}}}$

B) ${{180}^{\text{o}}}$

C) ${{0}^{\text{o}}}$

D) ${{120}^{\text{o}}}$

• question_answer93) The ionization constant of phenol is higher than that of ethanol because:

A) phenoxide ion is bulkier than ethoxide

B) phenoxide ion is stronger base than ethoxide

C) phenoxide ion is stabilized through derealization

D) phenoxide ion is less stable than ethoxide

• question_answer94) Which one of the following arrangements does not truly represent the property indicated against it?

A) $B{{r}_{2}}<C{{l}_{2}}<{{F}_{2}}$ : Oxidising power

B) $B{{r}_{2}}<C{{l}_{2}}<{{F}_{2}}$ : Electronegativity

C) $B{{r}_{2}}<C{{l}_{2}}<{{F}_{2}}$ : Electron affinity

D) $B{{r}_{2}}<C{{l}_{2}}<{{F}_{2}}$ : Bond energy

• question_answer95) Among the following compounds the decreasing order of reactivity towards electrophilic substitution is :

A) II > I > III > IV

B) III > I > II > IV

C) IV > I > II > III

D) I > II > III > IV

• question_answer96) The (R) - and (S) - enantiomers of an optically active compound differ in:

A) their solubility in a chiral solvents

B) their reactivity with a chiral reagents

C) their optical rotation of plane polarised light

D) their melting points

• question_answer97) Benzoic acid may be converted to ethyl benzoate by reaction with:

A) sodium ethoxide

B) ethyl chloride

C) dry $HCl-{{C}_{2}}{{H}_{5}}OH$

D) ethanol

• question_answer98) $C{{F}_{2}}=C{{F}_{2}}$ is a monomer of:

A) buna-S

B) Teflon

C) glyptal

D) nylon-6

• question_answer99) The hormone which controls the processes like burning of fats, proteins and carbohydrates to liberate energy in the body is:

A) cortisone

B) thyroxine

D) insulin

• question_answer100) Which of the following colligative property can provide molar mass of proteins (or polymers or colloids) with greatest precision?

A) Osmotic pressure

B) Elevation of boiling point

C) Depression of freezing point

D) Relative lowering of vapour pressure

• question_answer101) Darwin's finches provide an excellent evidence in favour of organic evolution. These are related to which of the following evidences?

A) Embryology

B) Palaeontology (or fossils)

C) Anatomy

D)

• question_answer102) Which one of the following is correctly matched pair of a certain plant family and its one example?

A) Malvaceae?Cotton

B) Leguminosae?Mango (or Sunflower)

C) Cucurbitaceae?Orange

D) Brassicaceae?Wheat

• question_answer103) Relative Biological Effectiveness (RBE) usually refers to the damages caused by:

A) low temperature

B) high temperature

D) pollution

• question_answer104) The greatest biomass of autotrophs in the world's oceans is that of:

A) benthic brown algae, coastal fed algae and daphnids

B) benthic diatoms and marine viruses

C) sea grasses and slime molds

D) free-floating micro-algae, cyanobacteria and nanoplankton

• question_answer105) Enzymes are absent in:

A) algae

B) fungi

C) cyanobacteria

D) viruses

• question_answer106) An institution where valuable plant material-likely to become irretrievably lost in the wild or in cultivation-is preserved in a viable condition is known as:

A) genome

B) gene library

C) gene bank

D) herbarium

• question_answer107) For yielding one molecule of glucose, the Calvin cycle turns:

A) two times

B) four times

C) six times

D) eight times

• question_answer108) Photochemical reactions in the chloroplast are directly involved in:

A) photolysis of water and phosphorylation of ADP to ATP

B) formation of phosphoglyceric acid

C) synthesis of glucose and starch

D) fixation of carbon dioxide

• question_answer109) The first (initiating) step in photosynthesis is:

A) ionisation of water

B) attachment of $C{{O}_{2}}$ to 5-carbon sugar

C) excitation of chlorophyll by a photon of light

D) formation of ATP

• question_answer110) In most fungi, the food material is stored in the form of:

A) starch

B) glucose

C) sucrose

D) glycogen

• question_answer111) Feed back inhibition of an enzymatic reaction is caused by:

A) substrate

B) enzyme

C) end product

D) rise in temperature

• question_answer112) Small proteins produced by vertebrate cells naturally in response to viral infections and which inhibit mutliplication of viruses are called:

A) immunoglobulins

B) interferons

C) antitoxins

D) lipoproteins

• question_answer113) Which one of the following statements is correct with reference to honey bees?

A) Bees wax is a waste (excretory) product of honey bees

B) Communication among honey bees was discovered by Von Frisch

C) Apis indica is largest wild bee in India

D) Honey is predominantly sucrose and arabinose

• question_answer114) Lysosomes are the reservoirs (store houses) of:

A) hydrolytic enzymes

B) secretory glycoproteins

C) RNA and protein

D) fats (or sugars or ATP)

• question_answer115) Black rust of wheat is caused by a member species of the genus:

A) Mucor

B) Rhizopus

C) Aspergillus

D) Puccinia

• question_answer116) The first successfully cloned mammals (animal) that gained worldwide publicity was:

A) Molly (a sheep)

B) Polly (a sheep)

C) Chance (a bull)

D) Dolly (a sheep)

• question_answer117) As per geological time scale, hominids evolved during:

A) Miocene

B) Pliocene

C) Pleistocene

D) Oligocene

• question_answer118) Plasmids are suitable vectors for gene cloning because:

A) these are small circular DNA molecules which can integrate with host chromosomal DNA

B) these are small circular DNA molecules with their own replication origin site

C) these can shuttle between prokaryotic and eukaryotic cells

D) these often carry antibiotic resistance genes

• question_answer119) A bacterium which has found extensive use in genetic engineering work in plants is:

A) Bacillus coagulans

B) Clostridium septicum

C) Xanthomohas citric for Pseudomonas)

D) Agrobacterium tumefaciens

• question_answer120) Enzymes enhance the rate of a reaction by:

A) lowering the activation energy of the reaction

B) combining with the product as soon as it is formed

C) forming a reactant-product complex

D) changing the equilibrium point of the reaction

• question_answer121) One of the most important reasons why wild plants should thrive is that these are good sources of:

A) unsaturated edible oils

B) highly nutritive animals feed

C) genes for resistance to diseases and pests

D) rare and highly sought after fruits of medical importance

• question_answer122) Producing a giant mouse in the laboratory was possible through:

A) gene mutation

B) gene manipulation

C) gene synthesis

D) gene duplication

• question_answer123) Industrial production of ethanol from starch is brought about by a certain species of:

A) Azotobacter

B) Lactobacillus

C) Saccharomyces

D) Penicillim

• question_answer124) A water fem which is used as a green manure in rice fields is:

A) Salvinia

B) Mucor

C) Aspergillus

D) Azolla

• question_answer125) The endangered largest living lemur Idri idri is inhabitant of:

B) Mauritius

C) Sri Lanka

D) India

• question_answer126) ATP is a: nucleotide *-correct-answer-description-* A nucleotide contains (a) a S-C sugar, (b) a phosphate molecule and (c) a nitrogenous base. ATP is also a nucleotide. It also has a 5-C sugar (ribose), 3 phosphate molecules and a nitrogenous base (adenine).

A)

B) nucleosome

C) purine base

D) nucleoside

• question_answer127) The largest known ovules, largest male and female gametes, and largest plants are found among:

A) tree ferns and some monocots

B) angiosperms

C) gymnosperms

D) dicotyledonous plants

• question_answer128) Which one of the following correctly matches a Sexually Transmitted Disease (STD) with its pathogen?

A) AIDS?Bacillus anthracis

B) Syphilis?Treponema pallidum

C) Urethritis?Entamoeba gingivalis

D) Gonorrhoea?Leishmania donovani

• question_answer129) Removal of apical (terminal) bud of a flowering plant (or pruning of a flowering plant) leads to:

A) formation of new apical buds

B) formation of adventitious roots on the cut side

C) early flowering (or stopping of floral growth)

D) promotion of lateral branches

• question_answer130) The cell organelle involved in the glycosylation of proteins is:

A) ribosome

B) peroxisome

C) mitochondria

D) endoplasmic reticulum

• question_answer131) Among mammals, a significant role is the digestion of milk is played by:

A) rennin

B) invertase

C) amylase

D) intestinal bacteria

• question_answer132) Which one of the following is not a vestigial part in human?

A) Coccyx

B) Fingernails

C) Third molar of each side in each jaw

D) Segmental muscles of abdomen

• question_answer133) Conjugated proteins containing carbohydrates as prosthetic group are called:

A) lipoproteins

B) nucleoproteins

C) glycoproteins

D) chromoproteins

• question_answer134) Which one of the following is correctly matched pair of the given secretion and its primary role in human physiology?

A) Sebum?Sexual attraction

B) Sweat?Thermoregulation

C) Saliva?Tasting food

D) Tears?Excretion of salts

• question_answer135) The function of copper T is to prevent:

A) fertilization

B) egg maturation

C) ovulation

D) implantation of blastocyst

• question_answer136) The replication of DNA is a pre-requisite for a eukaryotic cell to undergo division. During the cell cycle the DNA replicates in:

A) S phase

B) ${{G}_{1}}$ phase

C) ${{G}_{2}}$ phase

D) M phase

• question_answer137) Which one of the following characters studied by Mendel in garden pea was found to be dominant?

A) Green seed colour

B) Terminal flower position

C) Green pod colour

D) Wrinkled seed

• question_answer138) Geocarpic fruits are produced by:

A) carrot

B) onion

C) ground nut

D) watermelon

• question_answer139) Special kinds of roots called pneumatophores are characteristics of the plants growing in:

A) sandy soils

B) saline soils

C) marshy places and salt lakes

D) dryland regions

• question_answer140) The plants growing in magnesium-deficient soil, but sprayed with urea would show:

A) deep green foliage

B) loss of pigments in petals

C) early flowering

D) yellowing of leaves

• question_answer141) Coconut milk (coconut water) is widely used in tissue culture because it contains:

A) auxins

B) ethylene

C) cytokinin

D) gibbereliins

• question_answer142) A research scholar once collected certain alga and found that its cells contained chlorophyll a, chlorophyll d and phycoerythrin. The alga must belong to:

A) Chlorophyceae

B) Rhodopyceae

C) Bacillariophyceae

D) Cyanophyceae

• question_answer143) Fixation of one molecule of $C{{O}_{2}}$ through Calvin cycle requires:

A) 3 ATP and 3 $NADP{{H}_{2}}$ molecules

B) 3 ATP and 2 $NADP{{H}_{2}}$ molecules

C) 2 ATP and 1 $NADP{{H}_{2}}$ molecules

D) 1 ATP and 2 $NADP{{H}_{2}}$ molecules

• question_answer144) In the life history of ferns, meiosis occurs at the time of:

A) formation of spores

B) formation of antheridia and archegonia

C) formation of gametes

D) germination of spores

• question_answer145) In a given plant, red colour (R) of fruits is dominant over white fruit (r); and tallness (T) is dominant over dwarfness (t). If a plant with genotype RRTt is crossed with a plant of genotype rrtt, what will be the percentage of tall plants with red fruits in the next generation?

A) 100%

B) 25%

C) 50%

D) 75%

A) recessive genes

B) lethal genes

C) polygenes

D) dominant genes

• question_answer147) The triplet codon in m-RNA which is usually the starting point for protein synthesis, is:

A) AUU

B) AUG

C) AUA

D) AUC

• question_answer148) Zinc as a nutrient is used by the plants in m form of:

A) Zn

B) $Z{{n}^{2+}}$

C) ZnO

D) $ZnS{{O}_{4}}$

• question_answer149) In an animal cell, protein synthesis takes place:

A) only on the ribosomes present in the cytosol

B) only on the ribosomes attached to nucelar envelope and endoplasmic reticulum

C) on ribosomes present in the nucleolus as well as in cytoplasm

D) on ribosomes present in the cytosol as well as in the mitochondria

• question_answer150) The most important feature of all living systems from the point of view of their continuity is their capacity to:

A) produce gametes

B) utilise oxygen to generate energy

C) use solar energy for metabolic activities

D) replicate the genetic information

• question_answer151) Many scientists consider viruses as living entities because these:

A) respire

B) can cause diseases

C) reproduce (inside host)

D) respond to tough environment

• question_answer152) RNA and DNA are similar in:

A) having similar sugars

B) having similar pyrimidine bases

C) being capable to replicate

D) being polymers of nucleotides

• question_answer153) In three-dimensional view, a transfer RNA (r-RNA) molecule appears:

A) Y-shaped

B) S-shaped

C) E-shaped

D) L-shaped

• question_answer154) Anticodon is present on:

A) r-RNA

B) t-RNA

C) mt-DNA

D) m-RNA

• question_answer155) Extranuclear DNA (genes) are located in:

A) lysosomes and chloroplasts

B) Golgi complex and ribosomes

C) chloroplasts and mitochondria

D) ribosomes and mitochondria

• question_answer156) During replication of DNA, its two strands separate. Each of these serves as a template for the formation of new strands. Such type of replication is called:

A) non-conservative

B) semi-conservative

C) flexible

D) conservative.

• question_answer157) The length of one turn of the helix in a B-form DNA is approximately:

A) 0.34 nm

B) 20 nm

C) 2 nm

D) 3.4 nm

• question_answer158) During ceil division, the spindle fibres get attached to the condensing chromosome at a highly differentiated region. This region is called:

A) chromomere

B) chromocentre

C) centriole

D) kinetochore

• question_answer159) Mongoloid idiocy in human beings caused by me trisomy of chromosome 21 is also known as:

A) Down's syndrome

B) Turner's syndrome

C) Klinefelter's syndrome

D) Tay-Sachs disease

• question_answer160) Drosophila flies with XXY genotype are females, but human beings with such genotype are abnormal males. It shows that:

A) Y-chromosome is essential for sex determination in Drosophila

B) Y-chromosome is female determinating in Drosophila

C) Y-chromosome is male determining in human beings

D) Y-chromosome has no role in sex determination either in Drosophila or in human beings

• question_answer161) Which one pair of parents out of the following is most likely get a child who would suffer from hemolytic disease of the new-born:

A) $R{{h}^{+}}$ mother and $R{{h}^{-}}$ father

B) $R{{h}^{-}}$ mother and $R{{h}^{-}}$ father

C) $R{{h}^{+}}$ mother and $R{{h}^{+}}$ father

D) $R{{h}^{-}}$ mother and $R{{h}^{+}}$ father

• question_answer162) During organ differentiation in Drosophila, an organ is modified to another organ (such as wings may be replaced by legs). Genes responsible for such metamorphosis are called:

A) double dominant genes

B) plastid genes

C) complementary genes

D) homeotic genes

• question_answer163) One function of telomeres in a chromosome is to:

A) ?seal? the ends of the chromosomes

B) help two chromatids to move towards poles

C) starts RNA synthesis

D) identify the correct member of the homologous pair of chromosome

• question_answer164) Melatonin is secreted by:

A) skin

B) thymus

C) pituitary

D) pineal gland

• question_answer165) What is correct regarding leucocytes?

A) These can squeeze out through (can cross) the capillary walls

B) These are enucleate

C) Sudden fall in their number indicates cancer

D) These are produced in thymus

• question_answer166) Which one of the following is a skull hone?

A) Coracoid

B) Arytaenoid

C) Atlas

D) Pterygoid

• question_answer167) The polysaccharide portion of a peptidoglycan present in the matrix of cartilage is called:

A) chondriotin

B) ossein

C) cartilagin

D) casein

• question_answer168) In living beings, ammonia is converted into urea through:

A) Ornithine cycle

B) citrulline cycle

C) fumarine cycle

D) arginine cycle

• question_answer169) Which one of the following hormones is involved in the ripening of fruits?

A) Zeatin

B) Indole acetic acid

C) Ethylene

D) Naphthalene acetic acid

• question_answer170) Which one of the following primates is believed to be the closest relative of human beings?

A) Gorilla

B) Rhesus monkey

C) Gibbon

D) Orangutan

• question_answer171) Which of the following is a correct statement with regard to a certain Mammal and its one feature?

A) Bat bears feathers

B) Camel has biconcave red blood cells

C) Platypus lays eggs

D) Rat bears cloaca

• question_answer172) Blastopore is the opening to the exterior of:

A) coelom

B) coelenterons

C) archentron

D) blastocoels

• question_answer173) Movement of ions or molecules against the electrochemical gradient is called:

A) diffusion

B) pinocytosis

C) Brownian movement

D) active transport

• question_answer174) The enteronephric nephridia of earthworms are mainly concerned with:

A) digestion

B) respiration

C) osmoregulation

D) excretion of nitrogenous wastes

• question_answer175) The ability of the vertebrates to produce concentrated (hyperosmotic) urine usually depends upon the:

A) area of Bowman's capsule epithelium

B) length of Henle's loop

C) length of the proximal convoluted tubule

D) capillary network forming glomerulus

• question_answer176) The enzyme which catalyses fixation of $C{{O}_{2}}$ in ${{C}_{4}}$ plants is:

A) RuBP carboxylase

B) hydrogenase

C) PEP carboxylase

D) reductase

• question_answer177) Which of the following is not a characteristic feature of all the chordates?

A) Presence of coelom

B) Pharyngeal gill clefts in the early embryonic stages

C) A diaphragm that separates thorax from abdomen

D) Dorsal nerve cord

• question_answer178) Melanocyte Stimulating Hormone (MSH) is produced by:

A) anterior pituitary

B) posterior pituitary

C) pars intermedia of pituitary

D) parathyroid

• question_answer179) The feature closely related with the evolution of humans is:

A) loss of tail

B) flat nails

C) binocular vision

D) shortening of jaw

• question_answer180) An action potential in the nerve fibre is produced when positive and negative charges on the outside and the inside of the axon membrane are reversed, because:

A) more potassium ions enter the axon as compared to sodium ions leaving it

B) more sodium ions enter the axon 4 compared to potassium ions leaving it

C) all potassium ions leave the axon

D) all sodium ions enter the axon

• question_answer181) Numerous filamentous hair-like structures protruding from the tip of a young cob maize are:

A) anthers

B) hairs

C) hairy projections of the bracts

D) long styles of carpels

• question_answer182) Which method out of the following renders the seed coat permeable to water so that embryo expansion is not physically retarded?

A) Stratification

B) Denudation

C) Verbalization

D) Scarification

• question_answer183) Eight nucleate embryo sacs are:

A) always bisporic

B) always tetrasporic

C) always monosporic

D) sometimes monosporic, sometimes bisporic and sometimes tetrasporic

• question_answer184) Double fertilisation (or triple fusion) leading to initiation of endosperm in angiosperms, requires:

A) fusion of 4 or more polar nuclei and the second male gamete only

B) fusion of 2 polar nuclei and second male gamete only

C) fusion of one polar nucleus and second male gamete only

D) all the above type of fusions in different types of angiosperms

• question_answer185) Progestrone, which is the most important component of oral contraceptive pills, prevents pregnancy by:

A) preventing the formation of egg

B) preventing the clevage of the fertilized egg

C) creating unfavourable chemical environment for the sperms to survive in the female reproductive tract

D) blocking ovulation

• question_answer186) Cleavage in mammalian egg is:

A) equal holoblastic

B) unequal holoblastic

C) superficial meroblastic

D) discoidal meroblastic

• question_answer187) Bovine spongiform encephalopathy is a bovine disease. To which of the following human diseases it is related?

A) Kala azar

B) Encephalitis

C) Cerebral spondylitis

D) Creutzfeldt Jacob disease

• question_answer188) The type of joint between sternum and ribs in human beings is:

A) fibrous joint

B) gliding joint

C) angular joint

D) cartilaginous joint

• question_answer189) What is common between Ascaris lumbricoides and Anopheles stephensi?

A) Hibernation

B) Metamerism

C) Anaerobic respiration

D) Sexual dimorphism

• question_answer190) A certain person eats boiled potato; one of the food component in it is:

A) lactose which is indigestible

B) starch which does not get digested

C) cellulose which is digested by intestinal cellulose

D) DNA which gets digested by pancreatic DNA ase

• question_answer191) Pulmonary artery is different from pulmonary vein because it has:

A) larger lumen

B) thick muscular walls

C) no endothelium

D) valves

• question_answer192) A common scent-producing gland among mammals is:

A) anal gland

B) prostate gland

D) Bartholin's gland

• question_answer193) What happens during vascularisation in plants?

A) Differentiation of procambium followed by primary phloem and then primary xylem

B) Differentiation of procambium, xylem and phloem simultaneously

C) Differentaition of procambium followed immediately by the development of secondary xylem and phloem

D) Differentiation of procambium followed by the development of xylem and phloem

• question_answer194) A person suffering from the deficiency of the visual pigment rhodopsin is advised to take more of:

B) apple and grapes

C) carrot and ripe papaya

D) guava and ripe banana

• question_answer195) In a person of advanced age, the hair become thinner gradually. It happens because of decrease in:

A) synthesis of glucose

B) synthesis of proteins

C) energy availability

D) blood supply

• question_answer196) In simple epithelium, the cells are:

A) continuously dividing to provide cells for forming an organ

B) hardened to provide support to the organs

C) loosely connected to one another to from an irregular layer

D) cemented directly to one another to form a single layer

• question_answer197) Which one of the following amino acids is an essential part of human diet?

A) Glycine

B) Phenylalanine

C) Serine

D) Aspartic acid

• question_answer198) Patients suffering from cholera are given a saline drip because:

A) $N{{a}^{+}}$ ions help in stopping nerve impulses and hence sensation of pain

B) $N{{a}^{+}}$ ions help in the retention of water in the body tissues

C) NaCl is an important component of energy supply

D) NaCI furnishes most of the fuel required for cellular activity

• question_answer199) A piece of bone such as femur of frog, if kept in dilute HCl, for about a week will:

A) shrink in size

B) assume black colour

C) crack into pieces

D) turn flexible

• question_answer200) 'Signal hypothesis' for the biosynthesis of secretory type of proteins was proposed by:

A) Camillo Golgi

B) Blobel and Sabatini

C) Baltimore

D) Sheeler and Bianchi