# Solved papers for WB JEE Medical WB JEE Medical Solved Paper-2015

### done WB JEE Medical Solved Paper-2015

• question_answer1) Two particles of mass ${{m}_{1}}$and${{m}_{2}};$ approach each other due to their mutual gravitational attraction only. Then,

A) accelerations of both the particles are equal

B) acceleration of the particle of mass ${{m}_{1}}$a is proportional to ${{m}_{1}}$

C) acceleration of the particle of mass ${{m}_{1}}$is proportional to ${{m}_{2}}$

D) acceleration of the particle of mass ${{m}_{1}}$is inversely${{m}_{1}}$ proportional to${{m}_{1}}$

• question_answer2) Three bodies of the same material and having masses $m,m$and 3m are at temperatures $40{{\,}^{o}}C,\,\,50{{\,}^{o}}C$and $60{{\,}^{o}}C,$ respectively. If the bodies are brought in thermal contact, the final temperature will be

A) $45{{\,}^{o}}C$

B) $54{{\,}^{o}}C$

C) $52{{\,}^{o}}C$

D) $48{{\,}^{o}}C$

• question_answer3) A satellite has kinetic energy K, potential energy V and total energy E. Which of the following statements is true?

A) $K=-V/2$

B) $K=V/2$

C) $E=K/2$

D) $E=-K/2$

• question_answer4) An object is located 4 m from the first of two thin converging lenses of focal lengths 2 m and 1 m, respectively. The lenses are separated by 3m. The final image formed by the second lens is located from the source at a distance of

A) 8.0m

B) 5.5m

C) 6.0 m

D) 6.5 m

• question_answer5) A simple pendulum of length L swings in a vertical plane. The tension of the string when it makes an angle $\theta$ with the vertical and the bob of mass m moves with a speed v is (g is the gravitational acceleration)

A) $m{{v}^{2}}/L$

B) $mg\,\cos \theta +m{{v}^{2}}/L$

C) $mg\,\cos \theta \,-m{{v}^{2}}/L$

D) $mg\,\cos \theta$

• question_answer6) The length of a metal wire is ${{L}_{1}}$when the tension is ${{T}_{1}}$and ${{L}_{2}}$when the tension is ${{T}_{2}}.$The unstretched length of wire is

A) $\frac{{{L}_{1}}+{{L}_{2}}}{2}$

B) $\sqrt{{{L}_{1}}{{L}_{2}}}$

C) $\frac{{{T}_{2}}{{L}_{1}}-{{T}_{1}}{{L}_{2}}}{{{T}_{2}}-{{T}_{1}}}$

D) $\frac{{{T}_{2}}{{L}_{1}}+{{T}_{1}}{{L}_{2}}}{{{T}_{2}}+{{T}_{1}}}$

• question_answer7) The line AA is on charged infinite A conducting plane which is perpendicular to the plane of the paper. The plane has a surface density of charge $\sigma$ and B is hall of mass m with a like charge of magnitude q. B is connected by string from a point on the line AA. The tangent of angle $(\theta )$ formed between the line AA and tile string is

A) $\frac{q\sigma }{2{{\varepsilon }_{0}}mg}$

B) $\frac{q\sigma }{4\pi {{\varepsilon }_{0}}mg}$

C) $\frac{q\sigma }{2\pi {{\varepsilon }_{0}}mg}$

D) $\frac{q\sigma }{{{\varepsilon }_{0}}mg}$

• question_answer8) The current I is in the circuit shown is

A) 1.33 A

B) zero

C) 2.00 A

D) 1.00 A

• question_answer9) A hollow sphere of external radius R and thickness $t(t<<R)$is made of a metal of density p. The sphere will float in water, if

A) $t\le \frac{R}{\rho }$

B) $t\le \frac{R}{3\rho }$

C) $t\le \frac{R}{2\rho }$

D) $t\ge \frac{R}{3\rho }$

• question_answer10) A metal wire of circular cross-section has a resistance ${{R}_{1}}.$The wire is now stretched without breaking, so that its length is doubled and the density is assumed to remain the same. If the resistance of the wire now becomes ${{R}_{2}},$then ${{R}_{2}}:{{R}_{1}}$is

A) 1 : 1

B) 1 : 2

C) 4:1

D) 1 : 4

• question_answer11) Assume that each diode as shown in the figure has a forward bias resistance of $50\Omega$and an infinite reverse bias resistance. The current through the resistance $150\,\Omega$is

A) 0.66 A

B) 0.05 A

C) zero

D) 0.04 A

• question_answer12) The rms speed of oxygen is v at a particular temperature. If the temperature is doubled and oxygen molecules dissociate into oxygen atoms, the rms speed becomes

A) $v$

B) $\sqrt{2}v$

C) $2v$

D) $4v$

• question_answer13) Two particles, A and B, having equal charges, after being accelerated through the same potential difference enter into a region of uniform magnetic field and the particles describe circular paths of radii ${{R}_{1}}$and${{R}_{2}},$ respectively. The ratio of the masses of A and B is

A) $\sqrt{{{R}_{1}}/{{R}_{2}}}$

B) ${{R}_{1}}/{{R}_{2}}$

C) ${{({{R}_{1}}/{{R}_{2}})}^{2}}$

D) ${{({{R}_{2}}/{{R}_{1}})}^{2}}$

• question_answer14) A large number of particles are placed around the origin, each at a distance R from the origin. The distance of the centre of mass of the system from the origin is

A) equal to R

B) less than equal to R

C) greater than R

D) greater than equal to R

• question_answer15) A straight conductor 0.1 m long moves in a uniform magnetic field 0.1 T. The velocity of the conductor is 15 m/s and is directed perpendicular to the field. The emf induced between the two ends of the conductor is

A) 0.10V

B) 0.15V

C) 1.50 V

D) 15.00 V

• question_answer16) A ray of light is incident at an angle $i$on a glass slab of refractive index $\,\mu .$The angle between reflected and refracted light is ${{90}^{o}}.$ Then, the relationship between $i$and $\,\mu .$is

A) $i={{\tan }^{-1}}\left( \frac{1}{\mu } \right)$

B) $\tan \,i=\mu$

C) $\sin \,i=\mu$

D) $\cos \,i=\mu$

• question_answer17) Two particles A and B are moving as shown in the figure. Their total angular momentum about the point $O$ is

A) $9.8\text{ }kg\text{ }{{m}^{2}}/s$

B) zero

C) $52.7\,kg\,{{m}^{2}}/s$

D) $37.9\,kg\,{{m}^{2}}/s$

• question_answer18) A 20 cm long capillary tube is dipped vertically in water and the liquid rises upto 10 cm. If the entire system is kept is a freely falling platform, the length of the water column in the tube will be

A) 5 cm

B) 10 cm

C) 15 cm

D) 20 cm

• question_answer19) A train is moving with a uniform speed of 33 m/s and an observer is approaching the train with the same speed. If the train blows a whistle of frequency 1000 Hz and the velocity of sound is 333 m/s, then the apparent frequency of the sound that the observer hears is

A) 1220 Hz

B) 1099 Hz

C) 1110 Hz

D) 1200 Hz

• question_answer20) A photon of wavelength 300 nm interacts with a stationary hydrogen atom in ground state. During the interaction, whole energy of the photon is transferred to the electron of the atom. State which possibility is correct. (Consider, Plank constant $=4\times {{10}^{-15}}\,eVs,$ velocity of light $=3\times {{10}^{8}}m/s,$ ionization energy of hydrogen$=13.6\text{ }eV$)

A) Electron will be knocked out of the atom

B) Electron will go to any excited state of the atom

C) Electron will go only to first excited state of the atom

D) Electron will keep orbiting in the ground state of the atom

• question_answer21) Particle A moves along X-axis with a uniform velocity of magnitude 10 m/s. Particle B moves with uniform velocity 20 m/s along a direction making an angle of ${{60}^{o}}$ with the positive direction of X-axis as shown in the figure. The relative velocity of B with respect to that of A is

A) 10 m/s along X-axis

B) $10\sqrt{3}\,m/s$along Y-axis (perpendicular to X-axis)

C) $10\sqrt{5}\,m/s$along the bisection of the velocities of A and B

D) 30 m/s along negative X-axis

• question_answer22) When light is refracted from a surface, which of its following physical parameters does not change?

A) Velocity

B) Amplitude

C) Frequency

D) Wavelength

• question_answer23) A solid maintained at ${{t}^{o}}_{1}C$is kept in an evacuated chamber at temperature${{t}^{o}}_{2}C$$({{t}_{2}}>>{{t}_{1}}).$The rate of heat absorbed by the body is proportional to

A) $t_{2}^{4}-t_{1}^{4}$

B) $(t_{2}^{4}+273)-(t_{1}^{4}+273)$

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

D) $t_{2}^{2}-t_{1}^{2}$

• question_answer24) Block B lying on a table weighs W. The coefficient of static friction between the block and the table is $\mu .$Assume that the cord between B and the knot is horizontal. The maximum weight of the block A for which the system will be stationary is

A) $\frac{W\tan \theta }{\mu }$

B) $\mu W\,\tan \theta$

C) $\mu W\sqrt{1+{{\tan }^{2}}\theta }$

D) $\mu W\sin \theta$

• question_answer25) The inputs to the digital circuit are as below. The output Y is

A) $A+B+\bar{C}$

B) $(A+B)\bar{C}$

C) $\bar{A}+\bar{B}+\bar{C}$

D) $\bar{A}+\bar{B}+C$

• question_answer26) Two particles A and B having different masses are projected from a tower with same speed. A is projected vertically upward B vertically downward. On reaching the ground

A) velocity of A is greater than that of B

B) velocity of B is greater than that of A

C) both A and B attain the same velocity

D) the particle with the larger mass attains velocity

• question_answer27) The work function of metals is in the range of 2eV to 5eV. Find which of the following wavelength of light cannot be used for photoelectric effect? (Consider, Plank constant $=4\times {{10}^{-15}}\,eVs,$ velocity of light$=3\times {{10}^{8}}\,m/s$)

A) 510 nm

B) 650 nm

C) 400 nm

D) 570 nm

• question_answer28) A thin plastic sheet of refractive index used to cover one of the slits of a double arrangement. The central point on the screen is now occupied by what would have been the 7th bright fringe before the plastic was used. If the wavelength of light is 600 nm, what is the thickness (in $\mu m$) of the plastic sheet

A) 7

B) 4

C) 8

D) 6

• question_answer29) The length of an open organ pipe is twice the length of another closed organ pipe. The fundamental frequency of the open pipe is 100 Hz. The frequency of the third harmonic of the closed pipe is

A) 100 Hz

B) 200 Hz

C) 300 Hz

D) 150 Hz

• question_answer30) A $5\,\mu F$capacitor is connected in series with a $10\,\mu F$capacitor. When a 300 V potential difference is applied across this combination/the total energy stored in the capacitors is

A) 15 J

B) 1.5 J

C) 0.15 J

D) 0.10 J

• question_answer31) A cylinder of height A is filled with water and is kept on a block of height $h/2.$The level of water in the cylinder is kept constant. Four holes numbered 1, 2, 3 and 4 are at the side of the cylinder and at heights $0,h/4,h/2$ and $3h/4,$ respectively. When all four holes are opened together, the hole from which water will reach farthest distance on the plane PQ is the whole number.

A) 1

B) 2

C) 3

D) 4

• question_answer32) The pressure p, volume V and temperature T for a certain gas are related by $p=\frac{AT-B{{T}^{2}}}{V},$ where A and B are constants. The work done by the gas when the temperature changes from ${{T}_{1}}$to ${{T}_{2}}$while the pressure remains constant, is given by

A) $A({{T}_{2}}-{{T}_{1}})+B(T_{2}^{2}-T_{1}^{2})$

B) $\frac{A({{T}_{2}}-{{T}_{1}})}{{{V}_{2}}-{{V}_{1}}}-\frac{B(T_{2}^{2}-T_{1}^{2})}{{{V}_{2}}-{{V}_{1}}}$

C) $A({{T}_{2}}-{{T}_{1}})-\frac{B}{2}(T_{2}^{2}-T_{1}^{2})$

D) $\frac{A({{T}_{2}}-T_{1}^{2})}{{{V}_{2}}-{{V}_{1}}}$

• question_answer33) In the circuit shown below, the switch is kept in position a for a long time and is then thrown to position b. The amplitude of the resulting oscillating current is given by

A) $E\sqrt{L/C}$

B) $E/R$

C) infinity

D) $E\sqrt{C/L}$

• question_answer34) A charge q is placed at one corner of a cube. The electric flux through any of the three faces adjacent to the charge is zero. The flux through any one of the other three faces is

A) $q/3\,{{\varepsilon }_{0}}$

B) $q/6\,{{\varepsilon }_{0}}$

C) $q/12\,{{\varepsilon }_{0}}$

D) $q/24\,{{\varepsilon }_{0}}$

• question_answer35) Two cells A and B of emf 2V and 1.5V respectively, are connected as shown in figure through an external resistance $10\,\Omega .$ The internal resistance of each cell is $5\,\Omega .$The potential difference ${{E}_{A}}$and ${{E}_{B}}$across the terminals of the cells A and B respectively are

A) ${{E}_{A}}=2.0V,{{E}_{B}}=1.5\,V$

B) ${{E}_{A}}=2.125\,V,\,{{E}_{B}}=1.375\,V$

C) ${{E}_{A}}=1.875\,V,{{E}_{B}}=1.625\,V$

D) ${{E}_{A}}=1.875\,V,{{E}_{B}}=1.375V$

• question_answer36) Two charges $+\text{ }q$and $-\text{ }q$are placed at a distance a in a uniform electric field. The dipole moment of the combination is $2qa(cos\,\theta \hat{i}+\sin \theta \hat{j}),$ where, $\theta$is the angle between the direction of the field and the line joining the two charges. Which of the following statement(s) is/are correct?

A) The torque exerted by the field on the dipole vanishes

B) The net force on the dipole vanishes

C) The torque is independent of the choice of coordinates

D) The net force is independent of a

• question_answer37) Find the right condition(s) for Fraunhoffer diffraction due to a single slit.

A) Source is at infinite distance and the incident beam has converged at the slit

B) Source is near to the slit and the incident beam is parallel

C) Source is at infinity and the incident beam is parallel

D) Source is near to the slit and the incident beam has converged at the slit

• question_answer38) The conducting loop in the form of a circle is placed in a uniform magnetic field with its plane perpendicular to the direction of the field. An emf will be induced in the loop, if

A) it is translated parallel to itself

B) it is rotated about one of its diameters

C) it is rotated about its own axis which is parallel to the field

D) the loop is deformed from the original shape

• question_answer39) A circular disc rolls on a horizontal floor without slipping and the centre of the disc moves with a uniform velocity v. Which of the following values of the velocity at a point on the rim of the disc can have?

A) $v$

B) $-\text{ }v$

C) $2v$

D) Zero

• question_answer40) Consider two particles of different masses. In which of the following situations the heavier of the two particles will have smaller de-Broglie wavelength?

A) Both have a free fall through the same height

B) Both move with the same kinetic energy

C) Both move with the same linear momentum

D) Both move with the same speed

• question_answer41) Match the flame colours of the alkaline earth metal salts in the Bunsen burner.

 A. Calcium P. Brick red B. Strontium q. Apple green C. Barium r. Crimson

A) A-p B-r C-q

B) A-r B-p C-q

C) A-q B-r C-p

D) A-p B-q C-r

• question_answer42) Extraction of gold (Au) involves the formation of complex ions X and Y. Gold ore $\xrightarrow[C{{N}^{-}}.{{H}_{2}}O.{{O}_{2}}]{Roasting}H{{O}^{-}}+X\xrightarrow{Zn}Y+Au$ X and y respectively are

A) $Au(CN)_{2}^{-}$and $Zn(CN)_{4}^{2-}$

B) $Au(CN)_{4}^{3-}$and$Zn(CN)_{4}^{2-}$

C) $Au(CN)_{3}^{-}$and $Zn(CN)_{6}^{4-}$

D) $Au(CN)_{4}^{-}$ and $Zn(CN)_{3}^{-}$

• question_answer43) The atomic number of cerium (Ce) is 58. The correct electronic configuration of $C{{e}^{3+}}$ion is

A) $[Xe]4{{f}^{1}}$

B) $[Kr]4{{f}^{1}}$

C) $[Xe]4{{f}^{13}}$

D) $[Kr]4{{d}^{1}}$

• question_answer44) The major product of the above reaction is

A)

B)

C)

D)

• question_answer45) The product of the above reaction is

A)

B)

C)

D)

• question_answer46) Sulphuryl chloride $(S{{O}_{2}}C{{l}_{2}})$reacts with white phosphorus $({{P}_{4}})$ to give

A) $PC{{l}_{5}},S{{O}_{2}}$

B) $OPC{{l}_{3}},SOC{{l}_{2}}$

C) $PC{{l}_{5}},S{{O}_{2}},{{S}_{2}}C{{l}_{2}}$

D) $OPC{{l}_{3}},S{{O}_{2}},{{S}_{2}}C{{l}_{2}}$

• question_answer47) The number of lone pairs of electrons on the central atoms of ${{\text{H}}_{\text{2}}}\text{O,SnC}{{\text{l}}_{\text{2}}}\text{,PC}{{\text{l}}_{\text{3}}}$respectively, are

A) 2,1, 1,3

B) 2,2, 1,3

C) 3, 1, 1, 2

D) 2,1, 2, 3

• question_answer48) Consider the following salts: $NaCl,HgC{{l}_{2}},\text{ }H{{g}_{2}}C{{l}_{2}},\text{ }CuC{{l}_{2}},\text{ }CuCl$and $\text{AgCl}\text{.}$Identify the correct set of insoluble salts in water.

A) $H{{g}_{2}}C{{l}_{2}},\text{ }CuCl,\text{ }AgCl$

B) $~HgC{{l}_{2}}\text{, }CuCl,\text{ }AgCl$

C) $~H{{g}_{2}}C{{l}_{2}}\text{, }CuC{{l}_{2}},\text{ }AgCl$

D) $~H{{g}_{2}}C{{l}_{2}},\text{ }CuCl,\text{ }NaCl$

• question_answer49) In the following compound, the number of sp-hybridised carbons are $C{{H}_{2}}=C=\underset{CN}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C\equiv CH$

A) 2

B) 3

C) 4

D) 5

• question_answer50) For the reaction $A+2B\xrightarrow{{}}C,$the reaction rate is doubled, if the concentration of A is doubled. The rate is increased by four times when concentrations of both A and B are increased by four times. The order of the reaction is

A) 3

B) 0

C) 1

D) 2

• question_answer51) At a certain temperature, the value of the slope of the plot of osmotic pressure [n) against concentration (C in$\text{mol}\,{{\text{L}}^{-1}}$) of a certain polymer solution is 291R. The temperature at which osmotic pressure is measured, is (R is gas constant)

A) $271{{\,}^{o}}C$

B) $18{{\,}^{o}}C$

C) 564 K

D) 18 K

• question_answer52) The RMS velocity of CO gas molecules at $27{{\,}^{o}}C$is approximately 1000 m/s. For ${{N}_{2}}$molecules at 600 K, the RMS velocity is approximately

A) 2000 m/s

B) 1414 m/s

C) 1000 m/s

D) 1500 m/s

• question_answer53) A gas can be liquefied at temperature T and pressure p provided

A) $T={{T}_{c}}$and $p<{{p}_{c}}$

B) $T<{{T}_{c}}$and $p>{{p}_{c}}$

C) $T>{{T}_{c}}$and $p>{{p}_{c}}$

D) $T>{{T}_{c}}$and $p<{{p}_{c}}$

• question_answer54) The dispersed phase and dispersion medium of fog respectively are

A) solid, liquid

B) liquid, liquid

C) liquid, gas

D) gas, liquid

• question_answer55) The decreasing order of basic character of ${{K}_{2}}O,\text{ }BaO,\text{ }CaO$and $MgO$is

A) ${{K}_{2}}O>BaO>CaO>MgO$

B) $~{{K}_{2}}\text{O}>CaO>BaO>MgO$

C) $~~MgO>BaO>CaO>{{K}_{2}}O$

D) $~MgO>CaO>BaO>{{K}_{2}}O$

• question_answer56) In aqueous alkaline solution, two electrons reduction of $HO_{2}^{-}$gives

A) $H{{O}^{-}}$

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

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

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

• question_answer57) Cold ferrous sulphate solution on absorption of NO develops brown colour due to the formation of

A) paramagnetic $[Fe{{({{H}_{2}}O)}_{5}}(NO)]S{{O}_{4}}$

B) diamagnetic $[Fe{{({{H}_{2}}O)}_{5}}({{N}_{3}})]S{{O}_{4}}$

C) paramagnetic $[Fe{{({{H}_{2}}O)}_{5}}(N{{O}_{3}})]{{[S{{O}_{4}}]}_{2}}$

D) diamagnetic $[Fe{{({{H}_{2}}O)}_{4}}(S{{O}_{4}})]N{{O}_{3}}$

• question_answer58) Among Be, B, Mg and Al, the second ionisation potential is maximum for

A) B

B) Be

C) Mg

D) Al

• question_answer59) In a mixture, two enantiomers are found to be present in 85% and 15% respectively. The enantiomeric excess (ee) is

A) 85%

B) 15%

C) 70%

D) 60%

• question_answer60) 1,4-dimethylbenzene on heating with anhydrous $\text{AlC}{{\text{l}}_{\text{3}}}$and $\text{HCl}$produces

A) 1,2-dimethylbenzene

B) 1,3-dimethylbenzene

C) 1, 2. 3-trimethylbenzene

D) ethylbenzene

• question_answer61) The product of the above reaction is

A)

B)

C)

D)

• question_answer62) Suppose the mass of a single Ag-atom is $m.$ Ag metal crystallises in fee lattice with unit cell of length q. The density of Ag metal in terms of a and $m$ is

A) $\frac{4m}{{{a}^{3}}}$

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

C) $\frac{m}{{{a}^{3}}}$

D) $\frac{m}{4{{a}^{3}}}$

• question_answer63) For the reaction, $2S{{O}_{2}}(g)+{{O}_{2}}(g)2S{{O}_{3}}(g)$at 300 K, the value of $\Delta {{G}^{o}}$is$~-690.9\text{ }R.$ The equilibrium constant value for the reaction at that temperature is (R is gas constant)

A) $10\,\text{at}{{\text{m}}^{-1}}$

B) $10\,\text{atm}$

C) 10

D) 1

• question_answer64) At a particular temperature, the ratio of equivalent conductance to specific conductance of a 0.01 N NaCl solution is

A) $10{{\,}^{5}}c{{m}^{3}}$

B) $10{{\,}^{3}}c{{m}^{3}}$

C) $10\,c{{m}^{3}}$

D) $10{{\,}^{5}}c{{m}^{2}}$

• question_answer65) The units of surface tension and viscosity of liquids respectively are

A) $kg\,{{m}^{-1}}{{s}^{-1}},N{{m}^{-1}}$

B) $kg\,{{s}^{-2}},kg\,{{m}^{-1}}{{s}^{-1}}$

C) $N{{m}^{-1}},kg\,{{m}^{-1}}{{s}^{-2}}$

D) $kg\,{{s}^{-1}},\,kg\,{{m}^{-2}}{{s}^{-1}}$

• question_answer66) The ratio of volumes of $\text{C}{{\text{H}}_{\text{3}}}\text{COOH}\,\text{0}\text{.1}\,\text{(N)}$to $\text{C}{{\text{H}}_{\text{3}}}\text{COONa}\,\,\text{0}\text{.1(N)}$required to prepare a buffer solution of pH 5.74 is (Given $p{{K}_{a}}$of $C{{H}_{3}}COOH$is 4.74)

A) 10: 1

B) 5:1

C) 1 :5

D) 1 : 10

• question_answer67) The reaction of methyltrichloroacetate $(C{{l}_{3}}CC{{O}_{2}}Me)$ with sodium methoxide $(NaOMe)$ generates

A) carbocation

B) carbine

C) carbanion

• question_answer68) Best reagent for nuclear iodination of aromatic compounds is

A) $~KI/C{{H}_{3}}COC{{H}_{3}}$

B) ${{I}_{2}}/C{{H}_{3}}CN$

C) $KI/C{{H}_{3}}COOH$

D) ${{I}_{2}}/HN{{O}_{3}}$

• question_answer69) In the Lassaignes test for the detection of nitrogen in an organic compound, the appearance of blue coloured compound is due to

A) ferric ferricyanide

B) ferrous ferricyanide

C) ferric ferrocyanide

D) ferrous ferrocyanide

• question_answer70) In the reaction $R\,MgBr+HC{{(OEt)}_{3}}\xrightarrow{Ether,{{H}_{3}}{{O}^{+}}}P,$ the product P is

A) $RCHO$

B) ${{R}_{2}}CHOEt$

C) ${{R}_{3}}CH$

D) $RCH{{(OEt)}_{2}}$

• question_answer71) Addition of sodium thiosulphate solution to a solution of silver nitrate gives X as white precipitate, insoluble in water but soluble in excess thiosulphate solution to give Y.. On boiling in water, Y gives Z. X, Y and Z respectively are

A) $A{{g}_{2}}{{S}_{2}}{{O}_{3}},N{{a}_{3}}[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}],A{{g}_{2}}S$

B) $A{{g}_{2}}S{{O}_{4}},Na[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}],A{{g}_{2}}{{S}_{2}}$

C) $A{{g}_{2}}{{S}_{2}}{{O}_{3}},N{{a}_{5}}[Ag{{({{S}_{2}}{{O}_{3}})}_{3}}],AgS$

D) $A{{g}_{2}}S{{O}_{3}},N{{a}_{3}}[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}],A{{g}_{2}}O$

• question_answer72) At temperature of 298K, the emf of the following electrochemical cell, Ag $(s)\,A{{g}^{+}}(0.1M)||Z{{n}^{2+}}(0.1M)|Zn(s)$will be (Given${{E}^{o}}_{cell}=-1.562\,\text{V}$)

A) $-1.532V$

B) $-1.503V$

C) $1.532V$

D) $-3.06V$

• question_answer73) For the reaction,${{X}_{2}}{{Y}_{2}}(l)\xrightarrow{{}}2X{{Y}_{2}}(g)$at $300\,K,$ the values of $\Delta U$and$\Delta S$ are 2 kcal and $\text{20}\,\text{cal}\,{{\text{K}}^{-1}}$respectively. The value of $\Delta G$for the reaction is

A) $~-3400\,\text{cal}$

B) $~3400\,\text{cal}$

C) $-2800\text{ cal}$

D) $2000\text{ cal}$

• question_answer74) The total number of aromatic species generated in the following reactions is

 (i) (ii) (iii) (iv)

A) zero

B) 2

C) 3

D) 4

• question_answer75) Roasted copper pyrite on smelting with sand produces

A) $\text{FeSi}{{\text{O}}_{\text{3}}}$as fusible slag and $\text{C}{{\text{u}}_{\text{2}}}\text{S}$as matte

B) $\text{CaSi}{{\text{O}}_{3}}$as infusible slag and $\text{C}{{\text{u}}_{\text{2}}}\text{O}$as matte

C) $\text{C}{{\text{a}}_{3}}{{(P{{O}_{4}})}_{2}}$as fusible slag and $\text{C}{{\text{u}}_{\text{2}}}\text{S}$as matte

D) $F{{e}_{3}}{{(P{{O}_{4}})}_{2}}$as infusible slag and $\text{C}{{\text{u}}_{\text{2}}}\text{S}$as matte

• question_answer76) lonisation potential values of noble gases decrease down the group with increase in atomic size. Xenon forms binary fluorides by the direct reaction of elements. Identify the correct statement(s) from below.

A) Only the heavier noble gases fo.rm such compounds

B) It happens because the noble gases have higher ionisation energies

C) It happens because the compounds are formed with electronegative ligands

D) Octet of electrons provide the stable arrangements

• question_answer77) Optical isomerism is exhibited by ($\text{oX}\,\text{=}$oxalate anion; $\text{en}\,\text{=}$ethylenediamine).

A) $cis-{{[CrC{{l}_{2}}{{(ox)}_{2}}]}^{3-}}$

B) ${{[Co{{(en)}_{3}}]}^{3+}}$

C) $trans-{{[CrC{{l}_{2}}{{(ox)}_{2}}]}^{3-}}$

D) ${{[Co(ox){{(en)}_{2}}]}^{+}}$

• question_answer78) The increase in rate constant of a chemical reaction with increasing temperature is (are) due to the fact(s) that

A) the number of collisions among the reactant molecules increases with increasing temperature

B) the activation energy of the reaction decreases with increasing temperature

C) the concentration of the reactant molecules increases with increasing temperature

D) the number of reactant molecules acquiring the activation energy increases with increasing temperature

• question_answer79) Within the list shown below, the correct pair of structures of alanine in pH ranges 2-4 and 9-11 is

 (i) ${{H}_{3}}{{N}^{+}}-CH(C{{H}_{3}})C{{O}_{2}}H$ (ii) ${{H}_{2}}N-CH(C{{H}_{3}})CO_{2}^{-}$ (iii) ${{H}_{3}}{{N}^{+}}-CH(C{{H}_{3}})CO_{2}^{-}$ (iv) ${{H}_{2}}N-CH(C{{H}_{3}})C{{O}_{2}}H$

A) I and II

B) I and III

C) II and III

D) III and IV

• question_answer80) Identify the correct method for the synthesis of the compound shown below from the following alternatives.

A)

B)

C)

D)

• question_answer81) A set of genes will be in a complete linkage when the progeny phenotypes for parental (P) and recombinant (R) types are

A) $P=0%,R=100%$

B) $P=50%,\text{ }R=50%$

C) $P<50%,\text{ }R>50%$

D) $~P=100%,\text{ }R=0%$

• question_answer82) Which one of the following statements is wrong in relation to transgenic Bt cotton plant?

A) Crop yield loss due to the attack by Bacillus thuringiensis bacterium is reduced

B) Crop yield loss due to the attack by lepidopteran insect pests is reduced

C) The use of chemical insecticides in the cotton field is minimised

D) Better quality cotton is produced

• question_answer83) Which one of the following natural polymers is found both in insects and fungi?

A) Pectin

B) Chitin

C) Cellulose

D) Suberin

• question_answer84) Third stage larva of Wuchereria bancrofti carried by Culex mosquito is called

A) cysticercus

B) merozoite

C) microfilariae

D) trophozoite

• question_answer85) Persons suffering from sickle-cell anaemia normally do not suffer from

A) cholera

B) malaria

C) high blood pressure

D) hepatitis

• question_answer86) Two related but geographically isolated species sire known as

A) sibling species

B) sympatric species

C) taxonomic species

D) allopatric species

• question_answer87) Which hormone is responsible for reabsorption of water in kidney?

B) STH

C) ACTH

D) GTH

• question_answer88) Wildlife Protection Act India was implemented in the year

A) 1982

B) 1988

C) 1972

D) 1970

• question_answer89) Which one of the following is a causative agent of plague?

A) Shigella flexneri

B) Bordetella pertussis

C) Staphylococcus aureus

D) Yersinia pestis

• question_answer90) Which one of the following hormones is responsible for uterine contraction during parturition?

A) Relaxin

B) Vasopressin

C) Oxytocin

D) Prolactin

• question_answer91) Melatonin is produced from

A) pineal gland

C) parathyroid gland

D) ovary

• question_answer92) Which one of the following is wrong for meiosis?

A) It leads to formation of sister chromatids

B) It occurs in diploid cell

C) It occurs in haploid cell

D) lt occurs by splitting of centromeres and separation of sister chromatids

• question_answer93) Which one of the following combination of all three fatty acids are essential for human beings?

A) Oleic acid. linoleic acid and linolenic acid

B) Palmitic acid. linoleic acid and arachidonic acid

C) Oleic acid, linoleic acid and arachidonic acid

D) Linoleic acid, linolenic acid and arachidonic acid

• question_answer94) Which one of the following information is essential to determine the genetic map distance between two genes located on the same chromosome?

A) Length of the particular chromosome

B) Number of genes present in the particular chromosome

C) Number of nucleotides in the particular chromosome

D) Percentage of crossing over or recombinant frequency between the two genes

• question_answer95) Phenomenon involving increase in concentration of non-degradable pollutants from lower to higher trophic levels is called

A) biomagnification

B) bioaccumulation

D) bioinvasion

• question_answer96) Which one of the following animals is uricotelic?

A) Lizard

B) Camel

D) Rohu fish

• question_answer97) Zymogenic cells of gastric gland secrete

A) pepsinogen

B) trypsin

C) pepsin

D) chymotrypsin

• question_answer98) During entry into the ovum, acrosome of sperm releases

A) hyaluronidase

B) alkaline phosphatase

C) acid phosphatase

D) carbonic anhydrase

• question_answer99) The epithelium found in the inner linings of stomach and intestine is

A) columnar

B) squamous

C) stratified

D) pseudostratified

• question_answer100) What is the stroke volume of an adult human heart?

A) 50 mL

B) 70 mL

C) 90 mL

D) 100 Ml

• question_answer101) Which one of the following cocci appears like grapes under microscope?

A) Streptococci

B) Diplococci

C) Staphylococci

D) Pneumococci

• question_answer102) Which one of the following components of urine in a healthy human does not differ much in concentration from that of blood plasma?

A) $N{{H}_{4}}^{+}$

B) ${{K}^{+}}$

C) $N{{a}^{+}}$

D) $S{{O}_{4}}^{2-}$

• question_answer103) Antibodies produced by a group of identical B-cells against a single epitope of an antigen is called

A) polyclonal antibodies

B) monoclonal antibodies

C) anti-hapten antibodies

D) somaclonal antibodies

• question_answer104) During waste water treatment, trickling filter is used for

A) primary treatment

B) secondary aerobic treatment

C) secondary anaerobic treatment

D) tertiary treatment

• question_answer105) The apoplast is located

A) outside the plasma membrane

B) in the entire cytosol

C) on both sides of plasma membrane

D) in the plastidial content

• question_answer106) The aleurone synthesises and secretes digestive enzymes that hydrolyse nutrients stored in the endosperm, in the presence of

A) auxin

B) gibberellin

C) cytokinin

D) ethylene

• question_answer107) ATP synthesis in cell requires

A) ${{H}^{+}}$ gradient across the membrane

B) ${{K}^{+}}$ gradient across the membrane

C) $P{{O}_{4}}^{3-}$ gradient across the membrane

D) $C{{a}^{2+}}$gradient across the membrane

• question_answer108) Relationship between DO and BOD is that they

A) are directly proportional

B) are inversely proportional

C) are not related

D) always remain equal to each other

• question_answer109) What is the full form of MAB?

A) Man and biosphere

B) Man and biosphere reserve

C) Man and biosphere reserve programme

D) Man and biosphere programme

• question_answer110) The Red Data Book records

A) species diversity of wetlands

B) list of water pollutants

C) list of threatened species

D) rate of population decline

• question_answer111) Beta $(\beta )$ diversity refers to diversity

A) within a community

B) between communities

C) between two eco zones

D) within a population

• question_answer112) Which one of the following acts solely as an inhibitory neurotransmitter?

A) Norepinephrine

B) Gamma $(\gamma )$ amino butyric acid

C) Acetylcholine

D) Dopamine

• question_answer113) Which one of the following antibiotics kills bacterial cells by inhibiting the olymerisation of peptidoglycan?

A) Aminoglycosides

B) Fluoroquinolones

C) Quinines

D) Penicillins

• question_answer114) Indicate the correct sequence during spermatogenesis.

A) Spermatozoa $\to$ spermatogonia $\to$spermatid $\to$spermatocyte

B) Spermatogonia$\to$spermatocyte $\to$ spermatid$\to$ spermatozoa

C) Spermatid$\to$spermatocyte$\to$ spermatozoa$\to$spermatogonia

D) Spermatocyte $\to$ spermatozoa $\to$spermatid $\to$ spermatogonia

• question_answer115) Which one of the following is called intra-specific chemical messenger?

A) Pheromones

B) Prostaglandins

C) Corticotrophin

D) Catecholamines

• question_answer116) Egg in female gametophyte is accompanied by

A) antipodal cells

B) synergids

C) definitive nucleus

D) tube nucleus

• question_answer117) Malacophily is the pollination by

A) insects

B) birds

C) snails

D) mammals

• question_answer118) Grittiness of pear fruit is caused by

A) sclereides

B) raphides

C) collenchyma

• question_answer119) Which one of the following organisms is not used as a biocontrol agent?

A) Bacillus sphaericus

B) Trichoderma viride

C) Bacillus thuringiensis

D) Bacillus subtilis

• question_answer120) Which one of the following statements is relevant to sex linked characters?

A) They always follow criss-cross inheritance

B) They do not follow criss-cross inheritance

C) They are mostly present on Y-chromosome

D) They are only present on X-chromosome

• question_answer121) Which one of the following insecticides is of plant origin?

A) Ecdysone

B) Rotenone

C) Parathion

D) Malathion

• question_answer122) The resting state of reptiles in winter is

A) hibernation

B) aestivation

C) diapause

D) moulting

A) pisces and amphibians

B) amphibians and reptiles

C) reptiles and birds

D) birds and mammals

• question_answer124) Which one of the following secretes glucagon?

A) Beta $(\beta )$ cells of islets of Langerhans

B) Alpha $(\alpha )$ cells of islets of Langerhans

A) the smallest bone of the body

B) young hyaline matrix of true bone in which calcium salts are deposited

C) membranous ossification of cranium

D) the largest bone of the body

• question_answer126) The bundle of axons in the central nervous system is known as

A) nerve

B) ganglion

C) tract

D) neuron

• question_answer127) Which one of the following enzymes is responsible for the conversion of norepinephrine to epinephrine?

A) Catecholamine-O-methyltransferase

B) Phenylalanine-N-methyltransferase

C) DOPA decarboxylase

D) Monoamine oxidase

• question_answer128) Passage cells help in

A) transport of water towards pericycle

B) transport of water towards epiblema

C) absorption of water from soil

D) passage of$\text{C}{{\text{O}}_{\text{2}}}$ towards stomata

A) phloem parenchyma

B) xylem parenchyma

C) sieve tube

D) sclerenchyma

• question_answer130) An allosteric inhibitor of the enzyme acts by binding to the

A) substrate

B) product

C) catalytic site of the enzyme

D) non-catalytic site of the enzyme

• question_answer131) Which one of the followings is an in situ method of biodiversity conservation?

A) National park

B) Botanical garden

C) Zoological garden

D) Scientific laboratory

A) Only histone protein

B) Both DNA and histone protein

C) Only DNA

D) Both DNA and RNA

• question_answer133) Which one of the followingmatchmg pairs is incorrect?

A) Mollusca-Pseudocoet

B) Cnidaria-Nematocyst

C) Annelida-Chloragogen cells

D) Echinodermata-Water vascular system

• question_answer134) Which one of the following matching pairs is incort-ect?

A) Shellfish - Pisces

B) Silver fish - Arthropoda

C) Cuttle fish - Mollusca

D) Star fish - Echinodermata

• question_answer135) All of the following symptoms are found in jaundice except

A) disorders of hepato-biliary system

B) abnormal secretion of pancreatic and gastric juices

C) bile duct obstruction

D) anaemia

• question_answer136) The hormone that stimulates the release of pancreatic juice is

A) secretin

B) glucagon

C) inhibin

D) insulin

• question_answer137) Which one of the following combinations acts as a usual antigen binding site of an antibody?

A) Variable regions of a light and another heavy chain

B) Variable regions of two. light chains

C) Variable regions of two heavy chains .

D) Variable -region -of a heavy chain and constant region of a light chain

• question_answer138) Nitrogenase enzyme is a

A) magnesium-iron protein

B) molybdenum-iron protein

C) iron-copper protein

D) nickel-iron protein

• question_answer139) Necrosis (die-back) of-the tip of young leaves is caused due to the deficiency of

A) iron

B) manganese

C) zinc

D) copper

• question_answer140) Guttation is a process of loss of water in

A) liquid form containing dissolved minerals

B) liquid form without dissolved minerals

C) vapour form with minerals

D) vapour form without minerals

• question_answer141) What will be the percentage of guanine in a DNA molecule having 20% adenine?

A) 20%

B) 30%

C) 40%

D) 60%

• question_answer142) Which one of the following group of animals is homeothermic?

A) Reptiles

B) Amphibians

C) Birds

D) Fishes

B) moulting

C) metamorphosis

D) retention of larval traits in the adult body

• question_answer144) The overlapping zone in between two ecosystems is known as

A) ecozone

B) biotope

C) ecotone

D) buffer zone

• question_answer145) The animal species controlling the ecosystem functioning is known as

A) edge species

B) pioneer species

C) keystone species

D) umbrella species

• question_answer146) Central dogma in molecular biology is

A) RNA $\to$ DNA $\to$ Protein

B) DNA $\to$ RNA $\to$Protein

C) RNA $\to$Protein $\to$ DNA

D) DNA $\to$ Protein$\to$RNA

• question_answer147) Which one of the followings is the functional unit of hearing?

A) Utricle

B) Organ of Zuckerkandl

C) Organ of Corti

D) Vestibular apparatus

• question_answer148) Which one of the followings is not a refractive medium of the eye?

A) Lens

B) Vitreous humour

C) Aqueous humour

D) Pupil

• question_answer149) The heart is covered by

A) epicardium

B) pericardium

C) supracardium

D) endocardium

• question_answer150) Vernalisation promotes flowering by

A) low temperature

B) high temperature

C) prolonged photoperiod

D) short photoperiod

• question_answer151) ${{\text{C}}_{\text{4}}}$pathway is advantageous over ${{\text{C}}_{3}}$pathway in plants as it

A) occurs in relatively low $\text{C}{{\text{O}}_{\text{2}}}$concentration

B) uses more amount of water

C) occurs in relatively low ${{\text{O}}_{2}}$ concentration

D) is less efficient in energy utilisation

• question_answer152) TCA cycle enzymes are located in

A) cristae .

B) outer membrane

C) mitochondrial matrix

D) mitochondrial intermembrane space

• question_answer153) Which one of the following statements is incorrect?

A) Insects have one pair of antenna

B) Millipeds possess two pairs of appendages in each segment of the body

C) Prawns have two pairs of antenna

D) Animals belonging to th8 phylum-Porifera have nematocyst

• question_answer154) Which one of the followings is not a characteristic feature of mammals?

A) Diphyodont tooth

B) Ten pairs of cranial nerves

C) Seven cervical vertebrae

D) Left aortic arch in the circulatory system

• question_answer155) Which one of the following combinations is incorrect?

A) Rio convention - Air pollution

B) Kyoto protocol - Climate change

C) Montreal protocol - Ozone depletion

D) Ramsar - Wetland convention conservation

• question_answer156) The eukaryotic cells have all of the followings except

A) peptidoglycan in the cell wall

B) the 80 S ribosome

C) nuclear membrane

D) mitochondria

• question_answer157) Which of the followings does not occur in the interphase of eukaryotic cell division?

A) Increase of ATP synthesis

B) Increase of DNA synthesis

C) Jncrease of RNA synthesis

D) Reduction in cell size

• question_answer158) Lactose (Lac) operon is regulated by

A) lac repfessor only

B) lac represser and CAP-cGM P complex

C) lac,repressor and CAP-cAMP complex

D) CAP-cAMP and CAP-cGMP complex

• question_answer159) Elongation of internode is caused by

A) ethylene

B) gibberellin

C) abscisic acid

D) cytokinin

A) n

B) 2n

C) 3n

D) 4n

• question_answer161) Banana is an example of

A) parthenocarpy

B) apomixis

C) parthenogenesis

D) polyembryony

• question_answer162) Stock and scion are used in

A) cutting

B) grafting

C) layering

D) micropropagatfbn

• question_answer163) Which one of the following is correct for blooming of short dayplants?

A) The long dark period is not critical

B) It is affected by intengaption of long dark period by brief exposure of light

C) It is not affected by interruption of long dark period by brief exposure of light

D) It is affected if the continuous light period is interrupted

• question_answer164) A dicotyledonous plant forms crown gall when

A) Agrobacterium tumefaciens comes in contact with the plant

B) Agrobacterium rhizogenes come\$Jn contact with the plant

C) a specific part of DNA from the Ti-plasmid gets fntegrated with the plant chromosome

D) a specific part of DNA from the Ri-plasmid gets integrated with the plant chromosome

• question_answer165) Gene therapy has been successful in curing genetic diseases in laboratory animals through

A) exposure to X-ray to rectify the defective gene

B) replacing the defective gene with a functional gene

C) oral delivery of genes

D) use of therapeutic medicines to rectify the defective gene

• question_answer166) The enzyme peptidyl transferase of prokaryotes resides in

A) 50 S ribosome

B) 30 S ribosome

C) 40 S ribosome

D) 60 S ribosome

• question_answer167) Which one of the followings is correct for the trans membrane proteins in lipid bilayer?

A) They are absent in animal cells

B) They act as channel proteins

C) They are absent in plant cells

D) They are only externally located

• question_answer168) Engulfing of solid materials by cells is called?

A) pinocytosis

B) phagocytosis

C) active transport

D) autolysis

• question_answer169) The ?RNA anticodon 3-UAC-5will pair with the mRNA codon

A) 5-AUU-3

B) 5-UAC-3

C) 5-AUG-3

D) 3-GUA-5

A) ribosome

B) DNA

C) catalase enzyme

D) centrosome

• question_answer171) Two membrane envelops is found in

A) mitochondria, Golgi apparatus and chloroplast

B) mitochondria, nucleus and chloroplast

C) nucleus, Golgi apparatus and endoplasmic reticulum

D) nucleus, ribosome andchloroplast

• question_answer172) Match the items in column I with those in  column II and choose the correct answer.

 Column I Column II A. Thiobacillus 1. Nitrogen-fixation B. Nitrosomonas 2. Ammonification C. Azotobacter 3. Nitrification D. Pseudomonas 4. Denitrification

A)  A-4B-3C-1D-2

B)  A-3B-4C-1D-2

C)  A-4B-2C-1D-3

D)  A-2B-1C-3D-4

• question_answer173) Match the item in column I with those in column II and the choose the correct answer.

 Column I Column II A. Mitosis 1. Occurs in diploid cells only B. Meiosis 2. Occurs in both haploid and diploid cells 3. Daughter and parent cells have same chromosome numbers 4. Synapsis of homologous chromosomes

A) A-1 B-2

B) A-2 B-3

C) A-3 B-4

D) A-4 B-1

• question_answer174) A male rabbit of genotype AABBDDEE is crossed with a female rabbit of genotype aabbddee to produce ${{F}_{1}}$hybrid offspring. How many genetically different gametes can be produced by this ${{F}_{1}}$hybrid?

A) 4

B) 8

C) 16

D) 32

• question_answer175) Match the following I with column II.

 Column I Column II A. Pollen grains 1. Photochemical smog B. PAN 2. Particulate pollution c. $C{{O}_{2}}$ 3. Global warming D. Cadmium 4. Itai-itai disease

A) A-2 B-1 C-3 D-4

B) A-4 B-2 C-1 D-3

C) A-1 B-2 C-3 D-4

D) A-3 B-1 C-2 D-4

• question_answer176) Select correct combination of statements for lymph.

 (I) It helps to maintain fluid balance of the body. (II) It is contained in lymphatic vessels and lymphatic organs in mammals. (III) It is derived from tissue fluid. (IV) It contains less antibodies than plasma. (V) Flows in both directions. (VI) It helps to conserve proteins and remove bacteria.

A) I, II, III, V

B) II, III, IV, VI

C) l,IV,V,VI

D) III, IV. V, VI

• question_answer177) Match the following column I with column II.

 Column I Column II A. Cytology 1. Study of fossils B. Entomology 2. Study of cells C. Palaeontology 3. Study of birds D. Ornithology 4. Study of insects

A)  A-2    B-3    C-4    D-1

B)  A-2    B-4    C-1    D-3

C)  A-1    B-2    C-4    D-3

D)  A-3    B-2    C-1   D-4

• question_answer178) Genes for maternal inheritance are located-in

A) Golgi bodies

B) mitochondria

C) lysosome

D) nucleolus

• question_answer179) Match the following column I with column II.

 Column I Column II A. Producer 1. Herbivores B. Primary consumer 2. Green plants C. Secondary consumer 3. Saprotrophs D. Decomposer 4. Carnivores

A)  A-1    B-2    C-3    D-4

B)  A-2    B-1    C-4    D-3

C)  A-2    B-4     C-3    D-1

D)  A-3    B-2    C-1    D-4

• question_answer180) Match the following column I with column II.

 Column I Column II A. Vitamin-${{B}_{1}}$ 1. Accumulation of fat B. Gastric juice 2. Loss of fat C. Starvation 3. Pepsin D. Obesity 4. Beri-beri

A) A-3 B-4 C-2 D-1

B) A-3 B-4 C-1 D-2

C) A-4 B-3 C-2 D-1

D) A-4 B-2 C-3 D-1

• question_answer181) Select the correct combination of statements for DNA fingerprinting.

 (i) It is ELISA based technique. (ii) It is PCR based technique. (iii) It is used by forensic scientists. (IV) It is based on the fingerprint of the individual. (V) It is a test for paternity.

A) I, II and III

B) II, III and IV

C) I, IV and V

D) I, III and IV

• question_answer182) Match the items in column I with those in column II and choose the correct answer.

 Column I Column II A. Klinefelter syndrome 1. Mutation in autosomal gene B. Thalassaemia 2. Mutation in sex chromosome-linked gene C. Down syndrome 3. Trisomy of autosome D. Colour blindness 4. Trisomy of sex chromosome

A) A-1 B-2 C-3 D-4

B) A-2 B-3 C-4 D-1

C) A-3 B-4 C-1 D-2

D) A-4 B-1 C-3 D-2

• question_answer183) An area is declared as Hot Spot when

A) it has 1500 or more endemic species and 75% of its original habitat is lost

B) it has 1500 or more vertebrate species and 75% of its original habitat is lost

C) it has more than 2000 species of plants

D) most of the species inhabiting the area is facing the risk of extinction

• question_answer184) Select the correct combination of statements regarding Myasthenia gra vis.

 (i) It is an autoimmune disorder. (ii) It causes insufficient acetylcholine binding that affects muscular contraction. (iii) Antibodies are developed against acetylcholine. (IV) Antibodies are developed Against acetylcholine receptors. (V) Antibodies are developed against acetylcholine esterase. (VI) It causes drooping of eyelids.

A) I, III, IV, VI

B) I, III, IV, VI

C) I, II, IV, VI

D) II, III, IV, V

• question_answer185) Each 100 mL of human arterial blood carries T mL of ${{\text{O}}_{\text{2}}}$ and Q mL of $\text{C}{{\text{O}}_{\text{2}}},$whereas each 100 mL of venous blood carries R mL of ${{\text{O}}_{\text{2}}}$ and S mL of $\text{C}{{\text{O}}_{\text{2}}}.$Choose the correct values ofP,Q, R and S.

A) $P=48mL,Q=19-20mL,R=52mL,S=14-15mL$

B) $P=19-20mL,Q=48mL,R=14-15mL,S=52mL$

C) $P=14-15mL,Q=52mL,R=19-20mL,S=48mL$

D) $P=52mL,Q=14-15mL,R=48mL,S=19-20mL$

• question_answer186) The usual cause (s) of peptic ulceration is/are

A) lower rate of secretion of gastric juice

B) higher rate of secretion of gastric and duodenal juices

C) improper neutralisation of gastric juice by duodenal juices

D) imbalance between the rate of secretion of gastric juice and the degree of protection offered by gastro-duoctenal mucosa

• question_answer187) Which of the following statements, is/are correct regarding the effects of pH on enzyme catalysed, reactions?

A) Direction of the reaction is influenced by $[{{H}^{+}}].$

B) lonisation state of dissociating groups on the enzyme is modified.

C) lonisation state of the substrate is modified.

D) Protein is not denatured with the change in pH.

• question_answer188) Which of the following statements is/are correct for transduction?

A) It is observed in Gram positive and Gram negative bacteria.

B) Bacteria should be in state of competence.

C) Transfer of DNA by a bacteriophagp takes place.

D) Packaging of both host and phage DNA takes place.

• question_answer189) Select the correct statement (s) pertaining to Chipko movement.

A) It was led by Sunderial Bahuguna.

B) It was a tree hugging movement.

C) It commenced in the Tehri-Garhwal district.

D) lt received global attention on environmentalprotection.

• question_answer190) Select the correct combination (s) from the following.

A) Gir - Asiatic Lion

B) Sunderbans - Rhinoceros

C) Periyar - Indian Elephant

D) Corbet National - Red Panda Park

A) Plastic

B) Organochlorine pesticides

C) Heavymetals

D) Domestic sewage

• question_answer192) Select the correct combination (s) from the followings.

A) Encephalitis - Viral disease

B) Kala-azar - Phlebotomus

C) Rhabditiform larvae -Ascaris

D) Entamoeba - Sporogony

• question_answer193) Intrinsic and extrinsic pathways of blood clotting are interlinked at the activation step of which of the following factors?

A) Factor IX

B) Factor IV

C) Factor X

D) Factor Xllla

• question_answer194) Which of the following pairs of cranial nerves is/are of mixed category?

A) Glossppharyngeal and hypoglossal

B) Trigeminal and abducens

C) Trigeminal and facial

D) Giossopharyngeal and vagus

• question_answer195) Opening and closing of stomata is controlled by

A) abscisic acid

B) $\text{C}{{\text{O}}_{\text{2}}}$concentration

C) concentration

D) light intensity

• question_answer196) Which of these gases was/were present in prebiotic atmosphere?

A) Ammonia

B) Methane

C) Oxygen

D) Hydrogen

• question_answer197) Which of these components is/are not present in Gram-negative bacteria?

A) Teichoic acid

B) Pseudomurein

C) Lipopolysaccharide

D) Mycolic acid

• question_answer198) Which of the following features is/are correct for heterochromatin of eukaryotic nucleus?

A) It is highly expanded in interphase

B) It stains densely with basic dyes

C) It is highly condensed in interphase

D) It stains densely with acidic dyes

• question_answer199) Which of the followings is/are correct for the inheritance of genes involved in human ABCY blood grouping?

A) It is inherited by complete dominant allele

B) It is inherited by complete recessive allele

C) It is inherited by codominant allele

D) It is inherited by single gene with more than two alleles

A) a mammal

B) commonly known as black back

C) an animal under data deficient category of wildlife

D) a threatened Indian wildlife