# Solved papers for NEET AIPMT SOLVED PAPER 2003

### done AIPMT SOLVED PAPER 2003

• question_answer1) A man weighs 80 kg. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of $5\,m/{{s}^{2}}$. What would be the reading on the scale? $(g=10\,\,m/{{s}^{2}})$

A) 800 N

B) 1200 N

C) Zero

D) 400 N

• question_answer2) A monkey of mass 20 kg is holding a vertical rope. The rope will not break when a mass of 25 kg is suspended from it but will break if the mass exceeds 25 kg. What is the maximum acceleration with which the monkey can climb up along the rope? $(g=10\,\,m/{{s}^{2}})$

A) $25\,\,m/{{s}^{2}}$

B) $2.5\,\,m/{{s}^{2}}$

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

D) $10\,\,m/{{s}^{2}}$

• question_answer3) J.J. Thomson's cathode-ray tube experiment demonstrated that:

A) the e/m of electrons is greater than the e/m of protons

B) the e/m ratio of the cathode-ray particles changes when a different gas is placed in the discharge tube

C) cathode rays axe streams of negatively charged ions

D) all the mass of an atom is essentially in the nucleus

• question_answer4) Reverse bias applied to a junction diode:

A) increases the majority carrier current

B) increases the minority carrier current

C) lowers the potential barrier

D) raises the potential barrier

• question_answer5) In which of the following systems will the radius of the first orbit (n = 1) be minimum?

A) Deuterium atom

B) Hydrogen atom

C) Doubly ionized lithium

D) Singly ionized helium

• question_answer6) A bar magnet is oscillating in the earth's magnetic field with a period T. What happens to its period and motion if its mass is quadrupled?

A) Motion remains SH with time period = 4T

B) Motion remains SH and period remains nearly constant

C) Motion remains SH with time period = T/2

D) Motion remains SH with time period = 2T

• question_answer7) A charged particle moves through a magnetic field in a direction perpendicular to it. Then the:

A) acceleration remains unchanged

B) velocity remains unchanged

C) speed of the particle remains unchanged

D) direction of the particle remains unchanged

• question_answer8) A thin circular ring of mass M and radius r is rotating about its axis with a constant angular velocity $\omega$. Four objects each of mass m, are kept gently to the opposite ends of two perpendicular diameters of the ring. The angular velocity of the ring will be:

A) $\frac{(M+4m)\,\omega }{M}$

B) $\frac{(M-4m)\,\omega }{M+4m}$

C) $\frac{M\,\omega }{4m}$

D) $\frac{M\,\omega }{M+4m}$

• question_answer9) A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of rums per cm is halved, the new value of the magnetic field is

A) 2B

B) 4B

C) B/2

D) B

• question_answer10) Following diagram performs the logic function of:

A) OR gate

B) AND gate

C) XOR gate

D) NAND gate

• question_answer11) The volume occupied by an atom is greater than the volume of the nucleus by factor of about:

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

B) ${{10}^{15}}$

C) ${{10}^{1}}$

D) ${{10}^{5}}$

• question_answer12) The mass number of a nucleus is:

A) sometimes equal to its atomic number

B) sometimes less than and sometimes more than its atomic number

C) always less than its atomic number

D) always more than its atomic number

• question_answer13) The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit) The binding energy of $_{2}H{{e}^{4}}$ is:

A) 28.4 MeV

B) 0.061 u

C) 0.0305 J

D) 0.0305 erg

• question_answer14) Barrier potential of a p-n junction diode does not depend on:

A) forward bias

B) doping density

C) diode design

D) Temperature

• question_answer15) A particle moves along a circle of radius $\left( \frac{20}{\pi } \right)$ m with constant tangential acceleration. If the velocity of the particle is 80 m/s at the end of the second revolution after motion has begun, the tangential acceleration is:

A) $160\,\pi \,m/{{s}^{2}}$

B) $40\,\,m/{{s}^{2}}$

C) $40\,\pi \,m/{{s}^{2}}$

D) $640\,\pi \,m/{{s}^{2}}$

• question_answer16) An electric kettle has two heating coils. When one of the coils is connected to an AC source, the water in the kettle boils in 10 min. When the other coil is used the water boils in 40 min. If both the coils are connected in parallel, the time taken by the same quantity of water to boil will be:

A) 25 min

B) 15 min

C) 8 min

D) 4 min

• question_answer17) If a ball is thrown vertically upwards with speed u, the distance covered during the last t seconds of its ascent is:

A) $ut-\frac{1}{2}g\,{{t}^{2}}$

B) (u + gt) t

C) ut

D) $\frac{1}{2}g{{t}^{2}}$

• question_answer18) Two 220 V, 100 W bulbs are connected first in series and then in parallel. Each time the combination is connected to a 220 V AC supply line. The power drawn by the combination in each case respectively will be:

A) 200 W, 150 W

B) 50 W, 200 W

C) 50 W, 100 W

D) 100 W, 50 W

• question_answer19) Fuse wire is a wire of:

A) low resistance and low melting point

B) low resistance and high melting point

C) high resistance and high melting point

D) high resistance and low melting point

• question_answer20) Solar energy is mainly caused due to:

A) fusion of protons during synthesis of heavier elements

B) gravitational contraction

C) burning of hydrogen in the oxygen

D) fission of uranium present in the sun

• question_answer21) An equiconvex lens is cut into two halves along (i) XOX' and (ii) YOY' as shown in the figure. Let $f,\,f',\,f''$ be the focal lengths of the complete lens, of each half in case (i), and of each half in case (ii), respectively. Choose the correct statement from the following:

A) $f'=f,\,\,f''=f$

B) $f'=2f,\,\,f''=2f$

C) $f'=f,\,\,f''=2f$

D) $f'=2f,\,\,f''=f$

• question_answer22) A nuclear reaction given by: $_{Z}{{X}^{A}}{{\to }_{Z+1}}{{Y}^{A}}{{+}_{-1}}{{e}^{0}}+\overline{v}$ represents:

A) fusion

B) fission

C) $\beta$-decay

D) $\gamma$-decay

• question_answer23) A sample of radioactive element has a mass of 10 g at an instant t = 0. The approximate mass of this element in the sample after two mean lives is:

A) 3.70 g

B) 6.30 g

C) 1.35 g

D) 2.50 g

• question_answer24) A photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted to 2 m then:

A) each emitted electron carries half the initial energy

B) number of electrons emitted is a quarter of the initial number

C) each emitted electron carries one quarter of the initial energy

D) number of electrons emitted is half the initial number

• question_answer25) The vector sum of two forces is perpendicular to their vector differences. In that case, the forces:

A) are not equal to each other in magnitude

B) cannot be predicted

C) are equal to each other

D) are equal to each other in magnitude

• question_answer26) A ball rolls without slipping. The radius of gyration of the ball about an axis passing through its centre of mass is K. If radius of the ball be R, then the fraction of total energy associated with its rotational energy will be:

A) $\frac{{{K}^{2}}}{{{K}^{2}}+{{R}^{2}}}$

B) $\frac{{{R}^{2}}}{{{K}^{2}}+{{R}^{2}}}$

C) $\frac{{{K}^{2}}+{{R}^{2}}}{{{R}^{2}}}$

D) $\frac{{{K}^{2}}}{{{R}^{2}}}$

• question_answer27) The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2m on the surface of A. What is the height of jump by the same person on the planet B?

A) 6 m

B) $\frac{2}{3}$ m

C) $\frac{2}{9}$ m

D) 18 m

• question_answer28) When a long spring is stretched by 2 cm, its potential energy is U. If the spring is stretched by 10 cm, the potential energy in it will be:

A) 10 U

B) 25 U

C) U/5

D) 5 U

• question_answer29) A particle of mass m oscillates with simple harmonic motion between points ${{x}_{1}}$ and ${{x}_{2}}$ the equilibrium position being O. Its potential energy is plotted. It will be as given below in the graph:

A)

B)

C)

D)

• question_answer30) An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The coulomb force $\vec{F}$ between the two is:

A) $k\frac{{{e}^{2}}}{{{r}^{3}}}\vec{r}$

B) $-k\,\frac{{{e}^{2}}}{{{r}^{3}}}\vec{r}$

C) $k\frac{{{e}^{2}}}{{{r}^{2}}}\hat{r}$

D) $-k\frac{{{e}^{2}}}{{{r}^{3}}}\hat{r}$

• question_answer31) A charge q is located at the centre of a cube. The electric flux through any face is:

A) $\frac{\pi q}{6(4\pi {{\varepsilon }_{0}})}$

B) $\frac{q}{6(4\pi {{\varepsilon }_{0}})}$

C) $\frac{2\pi q}{6(4\pi {{\varepsilon }_{0}})}$

D) $\frac{4\pi q}{6(4\pi {{\varepsilon }_{0}})}$

• question_answer32) An observer moves towards a stationary source of sound with a speed 1/5th of the speed of sound. The wavelength and frequency of the source emitted are $\lambda$ and f respectively. The apparent frequency and wavelength recorded by the observer are respectively:

A) $f,\,1,\,2\lambda$

B) $0.8f,\,0.8\lambda$

C) $1.2f,\,1.2\lambda$

D) $1.2\,f,\,\lambda$

• question_answer33) Motion of observer does not affect the wavelength reaching the observer, hence, wavelength remains $\lambda$. Consider a compound slab consisting of two different materials having equal thickneses and thermal conductivities K and 2K, respectively. The equivalent thermal conductivity of the slab is:

A) 3K

B) $\frac{4}{3}K$

C) $\frac{2}{3}K$

D) $\sqrt{2}\,K$

• question_answer34) If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be:

A) 70.7 Hz

B) 100 Hz

C) 25 Hz

D) 59 Hz

• question_answer35) A diamagnetic material in a magnetic field moves:

A) perpendicular to the field

B) from weaker to the stronger parts of the field

C) from stronger to the weaker parts of the field

D) in none of the above directions

• question_answer36) A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will:

A) become small, but non-zero

B) remain unchanged

C) become zero

D) become infinite

• question_answer37) A n-p-n transistor conducts when:

A) collector is positive and emitter is at same potential as the base

B) both collector and emitter are negative with respect to the base

C) both collector and emitter are positive with respect to the base

D) collector is positive and emitter is negative with respect to the base

• question_answer38) Which of the following rays are not electromagnetic waves?

A) $\beta$-rays

B) Heat rays

C) X-rays

D) $\gamma$-rays

• question_answer39) A man throws balls with the same speed vertically upwards one after the other at an interval of 2 seconds. What should be the speed of the throw so that more than two balls are in the sky at any time? (Given $g$$=9.8\,m/{{s}^{2}}$)

A) Any speed less than 19.6 m/s

B) Only with speed 19.6 m/s

C) More than 19.6 m/s

D) At least 9.8 m/s

• question_answer40) Two spheres of masses $m$ and $M$ are situated in air and the gravitational force between them is $F$. The space around the masses is now filled with a liquid of specific gravity 3. The gravitational force will now be:

A) $\frac{F}{3}$

B) $\frac{F}{9}$

C) 3F

D) F

• question_answer41) The potential energy of a simple harmonic oscillator when the particle is half way to its end point is:

A) $\frac{1}{4}F$

B) $\frac{1}{2}F$

C) $\frac{2}{3}F$

D) $\frac{1}{8}F$ (where E is the total energy)

• question_answer42) According to Curie's law, the magnetic susceptibility of a paramagnetic substance at an absolute temperature T is proportional to:

A) $\frac{1}{{{T}^{2}}}$

B) ${{T}^{2}}$

C) $\frac{1}{T}$

D) T

• question_answer43) The time period of a mass suspended from a spring is T. If the spring is cut into four equal parts and the same mass is suspended from one of the parts, then the new time period will be:

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

B) 2T

C) $\frac{T}{4}$

D) T

• question_answer44) In case of a forced vibration, the resonance wave becomes very sharp when the:

A) applied periodic force is small

B) quality factor is small

C) damping force is small

D) restoring force is small

• question_answer45) A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length L and height h What is the speed of its centre of mass when the cylinder reaches its bottom?

A) $\sqrt{\frac{4}{3}gh}$

B) $\sqrt{4gh}$

C) $\sqrt{2gh}$

D) $\sqrt{\frac{3}{4}gh}$

• question_answer46) A stationary particle explodes into two particles of masses ${{m}_{1}}$ and ${{m}_{2}}$ which move in opposite directions with velocities ${{v}_{1}}$ and ${{v}_{2}}$. The ratio of their kinetic energies ${{E}_{1}}/{{E}_{2}}$ is:

A) 1

B) ${{m}_{1}}{{v}_{2}}/{{m}_{2}}{{v}_{1}}$

C) ${{m}_{2}}/{{m}_{1}}$

D) ${{m}_{1}}/{{m}_{2}}$

• question_answer47) An ideal gas heat engine operates in a Carnot cycle between ${{227}^{o}}C$ and ${{127}^{o}}C$. It absorbs 6 kcal at the higher temperature. The amount of heat (in kcal) converted into work is equal to:

A) 1.6

B) 1.2

C) 4.8

D) 3.5

• question_answer48) We consider the radiation emitted by the human body. Which of the following statements is true?

A) The radiation is emitted during the summers and absorbed during the winters

B) The radiation emitted lies in the ultraviolet region and hence is not visible

C) The radiation emitted is in the infra-red region

D) The radiation is emitted only during the day

• question_answer49) Three capacitors each of capacity $4\,\mu F$ are to be connected in such a way that the effective capacitance is $6\,\mu F$. This can be done by:

A) connecting two in series and one in parallel

B) connecting two in parallel and one in series

C) connecting all of diem in series

D) connecting all of them in parallel

• question_answer50) In a Wheatstone's bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R, the equivalent resistance of the combination as seen by the battery is:

A) R

B) 2R

C) $\frac{R}{4}$

D) $\frac{R}{2}$

• question_answer51) The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I), benzene (II) and nitrobenzene (III) is:

A) II < III > I

B) I > II > III

C) III > II > I

D) II > III > I

• question_answer52) The densities of graphite and diamond at 298 K are 2.25 and $3.31\,\,g\,\,c{{m}^{-3}},$ respectively. If the standard free energy difference ($\Delta$${{G}^{\text{o}}}$) is equal to 1895 J mol-1, the pressure at which graphite will be transformed into diamond at 298 K is:

A) $9.92\times {{10}^{6}}\,Pa$

B) $9.92\times {{10}^{5}}\,Pa$

C) $9.92\times {{10}^{8}}\,Pa$

D) $9.92\times {{10}^{7}}Pa$

• question_answer53) Which one of the following is a free radical substitution reaction?

A)

B) $C{{H}_{3}}CHO+HCN\xrightarrow[{}]{{}}C{{H}_{3}}CH(OH)CN$

C)

D)

• question_answer54) The radioisotope, tritium $(\,_{1}^{3}H)$ has a half-life of 12.3 years. If the initial amount of tritium is 32 mg, how many milligrams of it would remain after 49.2 years?

A) 4 mg

B) 8 mg

C) 1 mg

D) 2 mg

• question_answer55) The reaction A$\to$B follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1 hour. What is the time taken for conversion of 0.9 mole of A to produce 0.675 mole of B?

A) 0.25 h

B) 2 h

C) 1 h

D) 0.5 h

• question_answer56) On the basis of the information available from the reaction $\frac{4}{3}Al+{{O}_{2}}\to \frac{2}{3}\,A{{l}_{2}}{{O}_{3}},\,\Delta G=-827\,kJ\,mo{{l}^{-1}}\,of$${{O}_{2}}$, the minimum emf required to carry out an electrolysis of $A{{l}_{2}}{{O}_{3}}$ is $(F=96500\,\,C\,mo{{l}^{-1}})$

A) 6.42 V

B) 8.56 V

C) 2.14 V

D) 4.28 V

• question_answer57) The final product C, obtained in this reaction

A) would be:

B)

C)

D)

• question_answer58) In this reaction: \begin{align} & C{{H}_{3}}CHO+HCN\xrightarrow[{}]{{}}C{{H}_{3}}CH(OH)CN \\ & \xrightarrow{H.OH}C{{H}_{3}}CH(OH)COOH \\ \end{align} an asymmetric centre is generated. The acid obtained would be:

A) 50% D + 50% L-isomer

B) 20% D + 80% L-isomer

C) D-isomer

D) L-isomer

• question_answer59) Name of the compound given below is:

A) 2, 3-diethylheptane

B) 5-ethyl-6-methyloctane

C) 4-ethyl-3-methyloctane

D) 3-methyl-4-ethyloctane

• question_answer60) According to the adsorption theory of catalysis, the speed of the reaction increase because:

A) absorption produces heat which increases the speed of the reaction

B) adsorption lowers the activation energy of the reaction

C) the concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption

D) in the process of adsorption, the activation energy of the molecules becomes large

• question_answer61) The emf of a Daniell cell at 298 K is ${{E}_{1}}$ ZN\,\left| \begin{align} & ZnS{{O}_{4}} \\ & (0.01\,M) \\ \end{align} \right|\,\left| \begin{align} & CuS{{O}_{4}} \\ & (1.0\,M) \\ \end{align} \right|Cu When the concentration of $ZnS{{O}_{4}}$ is 1.0M and that of $CuS{{O}_{4}}$ is 0.01 M, the emf changed to ${{E}_{2}}$. What is the relationship between ${{E}_{1}}$ and ${{E}_{2}}$?

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

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

C) ${{E}_{1}}>E{{ & }_{2}}$

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

• question_answer62) Vitamin ${{B}_{12}}$ contains:

A) Zn (II)

B) Ca (II)

C) Fe (II)

D) Co (III)

• question_answer63) Which one of the following octahedral complexes will not show geometrical isomerism? (A and B are monodentate ligands)

A) $[M{{A}_{4}}{{B}_{2}}]$

B) $[M{{A}_{5}}B]$

C) $[M{{A}_{2}}{{B}_{4}}]$

D) $[M{{A}_{3}}{{B}_{3}}]$

• question_answer64) Acrilan is a hard, horny and a high melting material. Which of the following represents its structure?

A) {{\left( \begin{align} & -C{{H}_{2}}-\underset{|}{\mathop{C}}\,H- \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,COO{{C}_{2}}{{H}_{5}} \\ \end{align} \right)}_{n}}\,\,

B) {{\left( \begin{align} & -C{{H}_{2}}-\underset{|}{\mathop{C}}\,H- \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl \\ \end{align} \right)}_{n}}

C) {{\left( \begin{align} & C{{H}_{2}}-\underset{|}{\mathop{C}}\,H- \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,CN \\ \end{align} \right)}_{n}}

D) {{\left( \begin{align} & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}} \\ & -C{{H}_{2}}-\overset{|}{\mathop{\underset{|}{\mathop{C}}\,}}\,- \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,COOC{{H}_{3}} \\ \end{align} \right)}_{n}}

• question_answer65) The molar heat capacity of water at constant pressure, C, is $75\,\,J{{K}^{-1}}\,mo{{l}^{-1}},$ When 1.0 kJ of heat is supplied to 100 g of water which is free to expand, the increase in temperature of water is :

A) 4.8 K

B) 6.6 K

C) 1.2 K

D) 2.4 K

• question_answer66) The reaction quotient (Q) for the reaction ${{N}_{2}}(g)\,+3{{H}_{2}}(g)$ $\rightleftharpoons$ $2N{{H}_{3}}(g)$ is given by $Q=\frac{{{[N{{H}_{3}}]}^{2}}}{[{{N}_{2}}]\,{{[{{H}_{2}}]}^{3}}}$ . The reaction will proceed towards right side if:

A) $Q>{{K}_{c}}$

B) Q = 0

C) $Q={{K}_{c}}$

D) $Q<{{K}_{c}}$

• question_answer67) What is the entropy change (in $J{{K}^{-1}}\,mo{{l}^{-1}}$) when one mole of ice is converted into water at ${{0}^{\text{o}}}C$? (The enthalpy change for the conversion of ice to liquid water is $6.0\,kJ\,mo{{l}^{-1}}$ at ${{0}^{\text{o}}}C$.)

A) 2.198

B) 21.98

C) 20.13

D) 2.013

• question_answer68) The method of zone refining of metals is based on the principle of:

A) greater noble character of the solid metal than that of the impurity

B) greater solubility of the impurity in the molten state than in the solid

C) greater mobility of the pure metal than that of impurity

D) higher melting point of the impurity than that of the pure metal

• question_answer69) According to IUPAC nomenclature sodium nitroprusside is named as:

A) sodium pentacyanonitrosyl ferrate (II)

B) sodium pentacyanonitrosyl ferrate (III)

C) sodium nitroferricyanide

D) sodium nitroferrocyanide

• question_answer70) Phospholipids are esters of glycerol with:

A) one carboxylic acid residue and two phosphate groups

B) three phoshate groups

C) three carboxylic acid residues

D) two carboxylic acid residues and one phosphate groups

• question_answer71) The oxidation states of sulphur in the anions $SO_{3}^{2-},\,{{S}_{2}}O_{4}^{2-}\,and\,{{S}_{2}}O_{6}^{2-}$ follow the order:

A) ${{S}_{2}}O_{4}^{2-}<{{S}_{2}}O_{6}^{2-}<SO_{3}^{2-}$

B) ${{S}_{2}}O_{6}^{2-}<{{S}_{2}}O_{4}^{2-}<SO_{3}^{2-}$

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

D) $SO_{3}^{2-}<{{S}_{2}}O_{4}^{2-}<{{S}_{2}}O_{6}^{2-}$

• question_answer72) The value of Planck's constant is $6.63\times {{10}^{34}}Js$. The velocity of light is $3.0\times {{10}^{8}}m{{s}^{-1}}$. Which value is closest to the wavelength in nanometers of a quantum of light with frequency of $8\times {{10}^{15}}{{s}^{-1}}$?

A) $4\times {{10}^{1}}$

B) $3\times {{10}^{7}}$

C) $2\times {{10}^{-25}}$

D) $5\times {{10}^{-18}}$

• question_answer73) The ions ${{O}^{2-}},\,{{F}^{-}},\,N{{a}^{+}},M{{g}^{2+}}\,and\,\,A{{l}^{3+}}$are isoelectronic. Their ionic radii show:

A) an increase from ${{O}^{2-}}$ to F- and then decrease from $N{{a}^{+}}$ to $A{{l}^{3+}}$

B) a decrease from ${{O}^{2-}}$ to F- and then increase from $N{{a}^{+}}$ to $A{{l}^{3+}}$

C) a significant increase from ${{O}^{2-}}$ to $A{{l}^{3+}}$

D) a significant decrease from ${{O}^{2-}}$ to $A{{l}^{3+}}$

• question_answer74) The temperature dependence of rate constant (k) of a chemical reaction is written in terms of Arrhenius equation, $k=A{{e}^{-E*/RT}}$. Activation energy $({{E}^{*}})$ of the reaction can be calculated by ploting:

A) $\log \,k\,vs\frac{1}{T}$

B) $\log \,k\,vs\,\frac{1}{\log \,T}$

C) k vs T

D) $k\,vs\frac{1}{\log \,T}$

• question_answer75) If the rate of the reaction is equal to the rate constant, the order of the reaction is:

A) 2

B) 3

C) 0

D) 1

• question_answer76) Which one of the following monomers gives the polymer neoprene on polymerization?

A) \begin{align} & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\text{Cl} \\ & \text{C}{{\text{H}}_{\text{2}}}\text{ = }\overset{\text{ }\!\!|\!\!\text{ }}{\mathop{\text{C}}}\,-CH=C{{H}_{2}} \\ \end{align}

B) $C{{F}_{2}}=C{{F}_{2}}$

C) $C{{H}_{2}}=CHCl$

D) $CC{{l}_{2}}=CC{{l}_{2}}$

• question_answer77) A and B in the following reactions are

A) $A=RR'C{{H}_{2}}CN,\,B=NaOH$

B)

C)

D)

A) oxidation of glucose to pyruvate

B) conversion of glucose to haem

C) oxidation of glucose to glutamate

D) conversion of pyruvate to citrate

• question_answer79) The basic character 6f the transition metal monoxides follows the order:

A) TiO > FeO > VO > CrO

B) TiO > VO > CrO > FeO

C) VO > CrO > TiO > FeO

D) CrO > VO > FeO > TiO

• question_answer80) Which of the following statements is not true?

A) HOCl is a stronger add than HOBr

B) HF is a stronger acid than HCl

C) Among halide tons, iodide is the most powerful reducing agent

D) Fluorine is the only halogen that does not show a variable oxidation state

• question_answer81) The compound \begin{align} & \,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}} \\ & C{{H}_{3}}-\overset{|}{\mathop{C}}\,=CH-C{{H}_{3}} \\ \end{align} on reaction with $NaC{{O}_{4}}$ hi the presence of $KMn{{O}_{4}}$ gives:

A) $C{{H}_{3}}COC{{H}_{3}}+C{{H}_{3}}CHO$

B) $C{{H}_{3}}CHO+C{{O}_{2}}$

C) $C{{H}_{3}}COC{{H}_{3}}$

D) $C{{H}_{3}}COC{{H}_{3}}+C{{H}_{3}}COOH$

• question_answer82) In a set of the given reactions, acetic acid yielded a product C, $C{{H}_{3}}COOH+PC{{l}_{5}}\to A\xrightarrow[Anh.\,AlC{{l}_{3}}]{{{C}_{6}}{{H}_{6}}}B\underset{Ether}{\mathop{\xrightarrow{{{C}_{2}}{{H}_{5}}MgBr}}}\,C$ product C would be:

A) $C{{H}_{3}}CH(OH){{C}_{6}}{{H}_{5}}$

B) $C{{H}_{3}}-\overset{\begin{smallmatrix} {{C}_{2}}{{H}_{5}} \\ | \end{smallmatrix}}{\mathop{C(OH){{C}_{6}}{{H}_{5}}}}\,$

C) $C{{H}_{3}}CH(OH){{C}_{2}}{{H}_{5}}$

D) $C{{H}_{3}}CO{{C}_{6}}{{H}_{5}}$

• question_answer83) Which of the following pairs of compounds are enantiomers?

A)

B)

C)

D)

• question_answer84) In Haber process 30 L of dihydrogen and 30 L of dinitrogen were taken for reaction which yielded only 50% of the expected product. What will be the composition of gaseous mixture under the aforesaid condition in the end?

A) 20L ammonia, 10L nitrogen, 30L hydrogen

B) 20L ammonia, 25L nitrogen, 15L hydrogen

C) 20L ammonia, 20L nitrogen, 20L hydrogen

D) 10L ammonia, 25L nitrogen, 15L hydrogen

• question_answer85) Which one of the following orders of acid strength is correct?

A) RCOOH > HOH > HC $\equiv$ CH > ROH

B) RCOOH >HC $\equiv$ CH > HOH > ROH

C) RCOOH > ROH > HOH > HC $\equiv$ CH

D) RCOOH > HOH > ROH > HC $\equiv$ CH

• question_answer86) When m-chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are):

A)

B)

C)

D)

• question_answer87) The following equilibria are given: $\begin{matrix} {{N}_{2}}+3{{H}_{2}}2N{{H}_{3}} & {{K}_{1}} \\ \end{matrix}$ $\begin{matrix} {{N}_{2}}+{{O}_{2}}2NO & {{K}_{2}} \\ \end{matrix}$ $\begin{matrix} {{H}_{2}}+\frac{1}{2}{{O}_{2}}{{H}_{2}}O & {{K}_{3}} \\ \end{matrix}$ The equilibrium constant of the reaction $2N{{H}_{3}}+\frac{5}{2}{{O}_{2}}\rightleftharpoons 2NO+3{{H}_{2}}O$ in terms of ${{K}_{1}},\,{{K}_{2}}$ and ${{K}_{3}}$ is:

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

B) $\frac{{{K}_{2}}\,K_{3}^{3}}{{{K}_{1}}}$

C) ${{K}_{1}}\,{{K}_{2}}\,{{K}_{3}}$

D) $\frac{{{K}_{1}}\,{{K}_{2}}}{{{K}_{3}}}$

• question_answer88) For which one of the following equations $\Delta H_{nreact}^{o}$ equal to $\Delta H_{f}^{o}$ for the product?

A) $Xe(g)+2{{F}_{2}}(g)\xrightarrow[{}]{{}}Xe{{F}_{4}}(g)$

B) $2CO(g)+{{O}_{2}}(g)\xrightarrow[{}]{{}}2C{{O}_{2}}(g)$

C) ${{N}_{2}}(g)+{{O}_{3}}(g)\xrightarrow[{}]{{}}2C{{O}_{2}}(g)$

D) $C{{H}_{4}}(g)+2C{{l}_{2}}(g)\xrightarrow[{}]{{}}C{{H}_{2}}C{{l}_{2}}(\ell )+2HCl\,(g)$

• question_answer89) Which of the following statements is not correct for sigma- and pi-bonds formed between two carbon atoms?

A) Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bond

B) Sigma-bond determines the direction between carbon atoms but a pi-bond has no primary effect in this regard

C) Sigma-bond is stronger than a pi-bond

D) Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectively

• question_answer90) Which one of the following compounds is not a protonic acid?

A) $SO{{(OH)}_{2}}$

B) $S{{O}_{2}}{{(OH)}_{2}}$

C) * $B{{(OH)}_{3}}$

D) $PO{{(OH)}_{3}}$

• question_answer91) Among the following, which is not the $\pi$-bonded organometallic compound?

A) $Cr{{({{\eta }^{6}}-{{C}_{6}}{{H}_{6}})}_{2}}$

B) ${{(C{{H}_{3}})}_{4}}Sn$

C) $K[PtC{{l}_{3}}\,({{\eta }^{2}}-{{C}_{2}}{{H}_{4}})]$

D) $Fe{{({{\eta }^{5}}-{{C}_{5}}{{H}_{5}})}_{2}}$

• question_answer92) The correct order of ionic radii of ${{Y}^{3+}},\,L{{a}^{3+}},\,E{{u}^{3+}}$ and $L{{u}^{3+}}$ is:

A) $L{{u}^{3+}}<E{{u}^{3+}}<L{{a}^{3+}}<{{Y}^{3+}}$

B) $L{{a}^{3+}}<E{{u}^{3+}}<L{{u}^{3+}}<{{Y}^{3+}}$

C) ${{Y}^{3+}}<L{{a}^{3+}}<E{{u}^{3+}}<L{{u}^{3+}}$

D) ${{Y}^{3+}}<L{{u}^{3+}}<E{{u}^{3+}}<L{{a}^{3+}}$

• question_answer93) Which one of the following characteristics of the transition metals is associated with their catalytic activity?

A) Colour of hydrated ions

B) Variable oxidation states

C) High enthalpy of atomization

D) Paramagnetic behavior

• question_answer94) The number of unpaired electrons in me complex ion ${{[Co{{F}_{6}}]}^{3-}}$ is:

A) 4

B) zero

C) 2

D) 3 (Atomic number Co = 27)

• question_answer95) Chargaffs rule states that in an organism:

A) amount of adenine (A) is equal to that of cytosine (C) and die amount of thymine (T) is equal to that of guanine (G)

B) amounts of all bases are equal

C) amount of adenine (A) is equal to that of thymine (T) and the amount of guanine (G) is equal to that of cytosine (C)

D) amount of adenine (A) is equal to that of guanine (G) and the amount of thymine (T) is equal to that of cytosine (C)

• question_answer96) The activation energy for a simple chemical reaction A $\to$ B is ${{E}_{a}}$ in forward direction. The activation energy for reverse reaction:

A) can be less than or more than ${{E}_{a}}$

B) is always double of ${{E}_{a}}$

C) is negative of ${{E}_{a}}$

D) is always less than ${{E}_{a}}$

• question_answer97) Formation of a solution from two components can be considered as: (1) pure solvent $\to$ separated solvent molecules, $\Delta {{H}_{1}}$ (2) pure solute $\to$ separated solute molecules, $\Delta {{H}_{2}}$ (3) separated solvent and solute molecules $\to$ solution, $\Delta {{H}_{3}}$ Solution so formed will be ideal if:

A) $\Delta {{H}_{so\ln }}=\Delta {{H}_{1}}-\Delta {{H}_{2}}-\Delta {{H}_{3}}$

B) $\Delta {{H}_{so\ln }}=\Delta {{H}_{3}}-\Delta {{H}_{1}}-\Delta {{H}_{2}}$

C) $\Delta {{H}_{so\ln }}=\Delta {{H}_{1}}+\Delta {{H}_{2}}+\Delta {{H}_{3}}$

D) $\Delta {{H}_{so\ln }}=\Delta {{H}_{1}}+\Delta {{H}_{2}}-\Delta {{H}_{3}}$

• question_answer98) The solubility product of Agl at ${{25}^{\text{o}}}C$ is $1.0\times {{10}^{-16}}\,mo{{l}^{2}}\,{{L}^{-2}}$. The solubility of $AgI$ in ${{10}^{-4}}N$ solution of KI at ${{25}^{\text{o}}}C$ is approximately (in mol ${{L}^{-1}}$):

A) $1.0\times {{10}^{-10}}$

B) $1.0\times {{10}^{-8}}$

C) $1.0\times {{10}^{-16}}$

D) $1.0\times {{10}^{-12}}$

• question_answer99) For the reaction, ${{C}_{3}}{{H}_{8}}(g)+5{{O}_{2}}(g)\xrightarrow[{}]{{}}3C{{O}_{2}}(g)+4{{H}_{2}}O\,(l)$ at constant temperature, $\Delta H-\Delta E$ is

A) +3RT

B) -RT

C) +RT

D) -3RT

• question_answer100) The pyknometric density of sodium chloride crystal is $2.165\,\times {{10}^{3}}\,kg{{m}^{-3}}$ while its X-ray density is $2.178\,\times {{10}^{3}}\,kg\,{{m}^{-3}}$. The fraction of unoccupied sites in sodium chloride crystal is:

A) $5.96\,\times {{10}^{-1}}$

B) $5.96\,\times {{10}^{-3}}$

C) 5.96

D) $5.96\,\times {{10}^{-2}}$

• question_answer101) Genetic map is one chat:

A) shows the stages during the cell division

B) shows the distribution of various species in a region

C) establishes sites of the genes on a chromo-some

D) establishes the various stages in gene evolution

• question_answer102) Coconut milk factor is:

A) abscisic acid

B) cytokinin

C) an auxin

D) a gibberellins

• question_answer103) Which one of the following triplet codes, is correctly matched with its specificity for an amino acid in protein synthesis or as 'start' or 'stop' codon?

A) UGU?Leucine

B) UAC?Tyrosine

C) UCG?Start

D) UUU?Stop

• question_answer104) Tobacco mosaic virus is a tubular filament of size:

A) $300\times 20\,\,nm$

B) $700\times 30\,\,nm$

C) $300\times 10\,\,nm$

D) $300\times 5\,\,nm$

• question_answer105) ELISA is used to detect viruses where the key reagent is:

A) DNA probe

B) RNAase

C) alkaline phosphatase

D) catalase

• question_answer106) Convergent evolution is illustrated by:

A) starfish and cuttle fish

B) dogfish and whale

C) rat and dog

D) bacterium and protozoan

• question_answer107) During translation initiation in prokaryotes, a GTP molecule is needed in:

A) association of 30S, m-RNA with formyl-met-t-RNA

B) association of 50S subunit of ribosome with initiation complex

C) formation of formyl-met-t-RNA

D) binding of 30S subunit of ribosome with m-RNA

• question_answer108) Sycon belongs to a group of animals, which are best described as:

A) multicellular with a gastrovascular system

B) multicellular having tissue organization, but no body cavity

C) unicellular or acellular

D) multicellular without any tissue organiza-tion

• question_answer109) Viruses are no more ?alive? than isolated chromosomes because:

A) they both require oxygen for respiration

B) both require the environment of a cell to replicate

C) they require both RNA and DNA

D) they both need food molecules

• question_answer110) Cellular totipotency is demonstrated by:

A) all eukaryotic cells

B) only bacterial cells

C) only gymnosperm cells

D) all plant cells

• question_answer111) Which one of the following concerns photophosphorylation?

A) ADP + Inorganic $P{{O}_{4}}$ $\to$ ATP

B) AMP + Inorganic $P{{O}_{4}}\xrightarrow[{}]{Light\,energy}ATP$

C) ADP + AMP $\xrightarrow[{}]{Light\,energy}ATP$

D) $\text{ADP}+\text{Inorganic P}{{\text{O}}_{4}}\xrightarrow{\text{Light energy}}\text{ATP}$

A) They scavenge damaged cells and cellular debris

B) These are produced in thyroid

C) There are three main types?cytotoxic T-cells, helper T-cells and suppressor T-cells

D) These originate in lymphoid tissues

• question_answer113) In recent years, DNA sequences (nucleotide sequence) of mt-DNA and Y-chromosomes were considered for the study of human evolution, because:

A) their structure is known in greater detail

B) they can be studied from the samples of fossil remains

C) they are small and therefore, easy to study

D) they are uniparental in origin and do not take part in recombination

• question_answer114) Which one of the following is a matching pair of an animal and a certain phenomenon it exhibits?

A) Chameleon ? Mimicry

B) Taenia ? Polymorphism

C) Pheretima ? Sexual dimorphism

D) Musca ? Complete metamorphosis

• question_answer115) Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants?

A) Red and violet

B) Violet and blue

C) Blue and green

D) Green and red

• question_answer116) Species are considered as:

A) artificial concept of human mind which cannot be defined in absolute terms

B) real units of classification devised by taxonomists

C) real basic units of classification

D) the lowest units of classification

• question_answer117) Random genetic drift in a population probably results from:

A) constant low mutation rate

B) large population size

C) highly genetically variable individuals

D) interbreeding within this population

• question_answer118) If Henle's loop were absent from mammalian nephron, which of the following is to be expected?

A) The urine will be more concentrated

B) The urine will be more dilute

C) There will be no urine formation

D) There will be hardly any change in the quality and quantity of urine formed

• question_answer119) During prolonged fasting, in what sequence are the following organic compounds used up by the body?

A) First carbohydrates, next proteins and lastly lipids

B) First proteins, next lipids and lastly carbohydrate

C) First carbohydrates, next fats and lastly proteins

D) First fats, next carbohydrates and lastly proteins

• question_answer120) What used to be described as Nissl granules in a nerve cell are now identified as?

A) Ribosomes

B) Mitochondria

C) Cell metabolites

D) Fat granules

• question_answer121) Genes for cytoplasmic male sterility in plants are generally located in:

A) nuclear genome

B) cytosol

C) chloroplast genome

D) mitochondrial genome

• question_answer122) The apical meristem of the root is present:

B) in all the roots

D) only in tap roots

• question_answer123) Diffuse porous woods are characteristic of plants growing in:

A) temperate climate

B) tropics

C) alpine region

D) cold winter regions

• question_answer124) In which one of the following nitrogen is not a constituent?

A) Invertase

B) Pepsin

C)

D) Bacteriochlorophyll

• question_answer125) Which one of the following is wrong in relation to photorespiration?

A) It is a characteristics of ${{C}_{4}}$ plants

B) It is a characteristics of ${{C}_{3}}$ plants

C) It occurs in chloroplasts

D) It occurs in daytime only

• question_answer126) Stomata of a plant open due to:

A) influx of hydrogen ions

B) influx of calcium ions

C) influx of potassium ions

D) efflux of potassium ions

• question_answer127) Stomata of CAM plants:

A) open during the night and close during the day

B) never open

C) are always open

D) open during the day and close at night

• question_answer128) The major portion of the dry weight of plants comprises of:

A) carbon, nitrogen and hydrogen

B) carbon, hydrogen and oxygen

C) nitrogen, phosphorus and potassium

D) calcium, magnesium and sulphur

• question_answer129) In Drosbphtia, the sex is determined by:

A) the ratio of pairs of X-chromosomes to the pairs of autosomes

B) whether the egg is fertilized or develops parthenogenetically

C) the ratio of number of X-chromosomes to the set of autosomes

D) X and Y-chromosomes

• question_answer130) Christmas disease in another name for:

A) Down's syndrome

B) sleeping sickness

C) haemophilia B

D) hepatitis B

A) do not show independent assortment

B) induce cell division

C) do not show a chromosome map

D) show recombination during meiosis

• question_answer132) Degeneration of a genetic code is attributed to the:

A) entire codon

B) third member of a codon

C) first member of a codon

D) second member of a codon

• question_answer133) Two opposite forces operate in the growth and development of every population. One of them relates to die ability to reproduce at a given rate. The force opposing it is called:

A) biotic potential

B) environmental resistance

C) morbidity

D) fecundity

• question_answer134) Fluoride pollution mainly affects:

A) teeth

B) kidney

C) brain

D) heart

• question_answer135) Which one of the following statements about viruses is correct?

A) Viruses are obligate parasites

B) Nucleic acid of viruses is known as capsid

C) Viruses possess their own metabolic system

D) All viruses contain both RNA and DNA

• question_answer136) Sexual reproduction in Spirogyra is an advanced feature because it shows:

A) morphologically different sex organs

B) physiologically differentiated sex organs

C) different sizes of motile sex organs

D) same size of motile sex organs

• question_answer137) Phenetic classification is based on:

A) dendograms based on DNA characteristics

B) sexual characteristics

C) the ancestral lineage of existing organisms

D) observable characteristics of existing orga-nisms

A) there is no electron donor

B) oxygen is the electron acceptor

C) triose phosphate is the electron donor while acetaldehyde is the electron acceptor

D) triose phosphate is the electron donor while pyruvic acid is the electron acceptor

• question_answer139) During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undegraded?

A) Hemicellulose

B) Cellulose

C) Lipids

D) Lignin

• question_answer140) Industrial melanism is an example of:

A) protective resemblance with the surroundings

C) drug resistance

D) darkening of skin due to smoke from industries

• question_answer141) The cells of the quiescent centre are characterised by:

A) dividing regularly to add to the corpus

B) dividing regularly to add to tunica

C) having dense cytoplasm and prominent nuclei

D) having light cytoplasm and small nuclei

• question_answer142) Differentiation of shoot is controlled by:

A) high gibberellin : auxin ratio

B) high gibberellin : cytokinin ratio

C) high auxin : cytokinin ratio

D) high cytokinin : auxin ratio

• question_answer143) In a flowering plant, archesporium gives rise to:

A) wall and die tapetum

B) only tapetum and sporogenous cells

C) only the wall of the sporangium

D) both wall and the sporogenous cells

• question_answer144) Which one of die following mineral elements plays an important role in biological nitrogen fixation?

A) Zinc

B) Molybdenum

C) Copper

D) Manganese

• question_answer145) Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone:

A) ethylene

B) abscisic acid

C) auxin

D) cytokinin

• question_answer146) In sugarcane plant $^{14}C{{O}_{2}}$ is fixed in a malic acid, in which the enzyme that fixes $C{{O}_{2}}$ is:

A) ribulose phosphate kinase

B) fructose phosphatase

C) ribulose Diphosphate carboxylase

D) phosphoenol pyruvic acid carboxylase

• question_answer147) Mycorrhiza is an example of:

A) endoparasitism

B) decomposers

C) symbiotic relationship

D) ectoparasitism

• question_answer148) Which one of the following is categorized under living fossils?

A) Selaginella

B) Metasequoia

C) Pinus

D) Cycas

• question_answer149) Boron in green plants assists in:

A) photosynthesis

B) sugar transport

C) activation of enzymes

D) acting as enzyme cofactor

• question_answer150) Chlorenchyma is known to develop in the:

A) spore capsule of a moss

B) pollen tube of Pinus

C) cytoplasm of Chlarella

D) mycelium of a green mould such as Aspergillus

• question_answer151) The term "antibiotic" was coined by:

A) Selman Waksman

B) Alexander Flemming

C) Edward Jenner

D) Louis Pasteur

• question_answer152) The aleurone layer in maize grain is specially rich in:

A) lipids

B) auxins

C) proteins

D) starch

• question_answer153) Which one of the following sequences was proposed by Darwin and Wallace for organic evolution?

A) Overproduction, constancy of population size, variations, natural selection

B) Variations, natural selection, over-production, constancy of population size

C) Overproduction, variations, constancy of population size, natural selection

D) Variations, constancy of population size, overproduction, natural selection

• question_answer154) Given below are four matchings of an animal and its kind of respiratory organ: (A) silver fish?trachea (B) scorpion ? book lung (C) sea squirt ? pharyngeal gills (D) dolphin ? skin The correct matchings are:

A) B and D

B) C and D

C) A and D

D) A, B and C

• question_answer155) Grey spots of oat are caused by deficiency of:

A) Mn

B) Fe

C) Cu

D) Zn

• question_answer156) Which of the following discoveries resulted in a Nobel Prize?

B) Genetic engineering

C) X-rays induce sex-linked recessive lethal mutations

D) Cytoplasmic inheritance

A) protection from parasites and predators

B) the chance to get rid of accumulated waste products

C) the ability to survive during adverse physical conditions

D) the ability to live for some time without ingesting food

• question_answer158) Which of the following plants are used as green manure in crop fields and in sandy soils?

A) Saccharum munja and Lantana camara

B) Dichanthium annulatum and Azolla nilotica

C) Crotolaria juncea and Alhagi comelorum

D) Calotropis procera and Phyllanthus niruri

• question_answer159) In which kingdom would you classify the archaea and nitrogen-fixing organisms. If the five- kingdom system of classification is used:

A) Protista

B) Monera

C) Plantae

D) Fungi

• question_answer160) Which one of the following traits of garden pea studied by Mendel was a recessive feature?

A) Green pod colour

B) Round seed shape

C) Axial flower position

D) Green seed colour

• question_answer161) The genes controlling the seven pea characters studied by Mendel are now known to be located on how many different chromosome.

A) Five

B) Four

C) Seven

D) Six

• question_answer162) Juicy hair-like structures observed in the lemon fruit develop from:

A) endocarp

B) mesocarp and endocarp

C) exocarp

D) mesocarp

• question_answer163) Which one of the following describes correctly the homologous structures?

A) Organs that have no function now, but had an important function in ancestors

B) Organs appearing only in embryonic stage and disappearing later in the adult

C) Organs with anatomical similarities, but performing different functions

D) Organs with anatomical dissimilarities, but performing same functions

• question_answer164) Darwin in his 'Natural Selection Theory', did not believe in any role of which one of the following in organic evolution?

A) Struggle for existence

B) Discontinuous variations

C) Parasites and predators as natural enemies

D) Survival of the fittest

• question_answer165) During its life-cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stages respectively:

A) metacercaria and cercaria

B) miracidium and metacercaria

C) redia and miracidium

D) cercaria and redia

• question_answer166) Escherichia coli is used as an indicator organism to determine pollution of water with:

A) industrial effluents

B) pollen of aquatic plants

C) heavy metals

D) faecal matter

• question_answer167) Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder?

A) 50%

B) 25%

C) 100%

D) 75%

• question_answer168) What would happen if in a gene encoding a polypeptide of 50 amino acids, 25th codon (UAU) is mutated to UAA?

A) A polypeptide of 49 amino acids will be formed

B) A polypeptide of 25 amino acids will be formed

C) A polypeptide of 24 amino acids will be formed

D) Two polypeptides of 24 and 25 amino acids will be formed

• question_answer169) Which one of the following pairs is not correctly matched?

A) Vitamin ${{B}_{12}}$ ? Pernicious anaemia

B) Vitamin ${{B}_{1}}$ ? Beri-beri

C) Vitamin C ? Scurvy

D) Vitamin ${{B}_{2}}$ ? Pellagra

• question_answer170) Which elements is located at the centre of the porphyrin ring in chlorophyll?

A) Potassium

B) Manganese

C) Calcium

D) Magnesium

• question_answer171) The major role of minor elements inside living organisms is to act as:

A) constituents of hormones

B) binder of cell structure

C) co-factors of enzymes

D) building blocks of important amino acids

• question_answer172) In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids?

A) 61

B) 60

C) 20

D) 64

• question_answer173) Which one of the following pairs of plants are not seed producers?

A) Fiats and Chlamydomonas

B) Punica and Pinus

C) Fem and Funaria

D) Funaria and Ficus

• question_answer174) Systemic heart refers to:

A) entire heart in lower vertebrates

B) the two ventricles together in humans

C) the heart that contracts under stimulation from nervous system

D) left auricle and left ventricle in higher vertebrates

• question_answer175) The linkage map of X-chromosome of fruit-fly has 66 units, with yellow body gene (y) at one end and bobbed hair (b) gene at the other end. The recombination frequency between these two genes (y and b) should be:

A) $\le \,50%$

B) 100%

C) 66%

D) > 50%

• question_answer176) Choromosomes in a bacterial cell can be 1-3 in number and:

A) can be either circular or linear, but never both within the same cell

B) can be circular as well as linear within die same cell

C) are always circular

D) are always linear

• question_answer177) Which one of the following contains the largest quantity of extracellular material?

A) Stratified epithelium

B) Myelinated nerve fibres

C) Striated muscle

D) Areolar tissue

• question_answer178) Bundle of His is a network of:

A) nerve fibres distributed in ventricles

B) nerve fibres found throughout the heart

C) muscle fibres distributed throughout the heart walls

D) muscle fibres found only in the ventricle wall

• question_answer179) Which endangered animal is the source of the world's finest, lightest, warmest and most expensive wool the shahtoosh?

A) Kashmiri goat

B) Chiru

C) Nilgai

D) Cheetal

A) malignant tumours of the colon

B) benign tumours of the connective tissue

C) malignant tumours of the connective tissue

D) malignant tumours of the skin or mucous membrane

• question_answer181) Which one of the following pairs correctly mathces a hormone with a disease resulting from its deficiency?

A) Parathyroid hormone ? Tetani

B) Insulin ? Diabetes insipidus

C) Relaxin ? Gigantism

D) Prolactin ? Cretinism

• question_answer182) Maximum application of animals cell culture technology today is in the production of:

A) vaccines

B) edible proteins

C) insulin

D) interferons

• question_answer183) Ommatidia serve die purpose of photoreception in:

A) humans

B) sunflower

C) cockroach

D) frog

• question_answer184) In a random mating population in equilibrium, which of die following brings about a change in gene frequency in non-directional manner?

A) Selection

B) Migration

C) Mutations

D) Random drift

• question_answer185) In which one of the following options the two names refer to one and the same thing?

A) Citric acid cycle and Calvin cycle

B) Tricarboxylic acid cycle and urea cycle

C) Krebs cycle and Calvin cycle

D) Tricarboxylic acid cycle and citric acid cycle

• question_answer186) Test tube baby means a baby born when:

A) the ovum is fertilized externally ad thereafter implanted in the uterus

B) it develops from a non-fertilized egg

C) it is developed in a test tube

D) it is developed through tissue culture method

• question_answer187) Which one of the following bacteria has found extensive use in genetic engineering work plants?

A) Bacillus coagulens

B) Agrobacterium tumefaciens

C) Costridium septicum

D) Xanthomonas citri

• question_answer188) Which group of vertebrates comprises the highest number of endangered species?

A) Reptiles

B) Birds

C) Mammals

D) Fishes

• question_answer189) During transcription, the DNA site at which RNA polymerase binds is called:

A) receptor

B) enhancer

C) promoter

D) regulator

• question_answer190) During embryonic development, the establishment of polarity along anterior posterior, dorsal/ventral or medial/lateral axis is called:

A) anamorphosis

B) pattern formation

C) organizer phenomena

D) axis formation

• question_answer191) What does ?lac? refer to in what we call the lac operon?

A) Lac insect

B) The number, 1, 00, 000

C) Lactose

D) Lactase

• question_answer192) Two crosses between the same pair of genotypes or phenotypes in which the sources of the gametes are reversed in one cross, is known as:

A) dihybrid cross

B) reverse cross

C) test cross

D) reciprocal cross

• question_answer193) Pattern baldness, moustaches and beard in human males are examples of:

A) sex differentiating traits

B) sex determining traits

D) sex limited traits

• question_answer194) Which one of the following conditions though harmful in itself, is also a potential saviour from a mosquito home infectious disease?

A) Pernicious anaemia

B) Leukemia

C) Thalassaemia

D) Sickle cell anaemia

• question_answer195) Plants reproducing by spores such as mosses and ferns are grouped under the general term:

A) sporophytes

B) thallophytes

C) cryptogams

D) bryophytes

• question_answer196) Which one pair of examples will correctly represent the grouping spermatophyta according to one of the schemes of classifying plants?

A) Rhizopus, Triticum

B) Ginkgo, Pisum

C) Acacia, sugarcane

D) Pinus, Cycas

• question_answer197) Nicotiana sylvestris flowers only during long days and N. tabacum flowers only during short days. If raised in the laboratory under different photoperiods, they can be induced to flower at the same time and can be crossfertilized to produce s elf-fertile offspring. What is die best reason for considering N. sylvestris and N. tabacum to be separate species?

A) They are physiologically distinct

B) They are morphologically distinct

C) They cannot interbreed in nature

D) They are reproductively distinct

A) the classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies

B) identification and arrangement of organisms on the basis of their cytological characterisitcs

C) the classification of organisms based on broad morphological characters

D) delimiting various taxa of organisms and establishing their relationships

• question_answer199) Bartholin's glands are situated:

A) on either side of vagina in humans

B) on either side of vas deference in humans

C) on the sides of the head of some amphibians

D) at the reduced tail end of birds

• question_answer200) Short-lived immunity acquired from mother to foetus across placenta or through mother's milk to the infant is categorised as:

A) cellular immunity

B) innate non-specific immunity

C) active immunity

D) passive immunity