KVPY Sample Paper

done KVPY Stream-SX Model Paper-30 Total Questions - 120    [Download]

• question_answer1)
  Three pieces of cakes of weights \[4\frac{1}{2}lbs,\,\,6\frac{3}{4}lbs\] and \[7\frac{1}{5}lbs\] respectively are to be divided into parts of equal weights. Further, each must be as heavy as possible. If one such part is served to each guest, then what is the maximum number of guests that could be entertained?
  A)
  54
  done clear
  B)
  72
  done clear
  C)
  20
  done clear
  D)
  41
  done clear
  View Answer play_arrow

• question_answer2)
  Number of solutions of the equation, \[[y+[y]]=2\text{ }cos\text{ }x\]is: \[(where\text{ }y=(1/3)\text{  }\!\![\!\!\text{ }sinx+[sinx+[sinx]]]\] and [  ] - greatest integer function)
  A)
  0
  done clear
  B)
  1              
  done clear
  C)
  2
  done clear
  D)
  \[\infty \]
  done clear
  View Answer play_arrow

• question_answer3)
  The curve \[y=a{{x}^{3}}+b{{x}^{2}}+cx\] is inclined by \[45{}^\circ \] to x-axis at origin and it touches x-axis at (1,0). Then
  A)
  \[a=-2,b=1,c=1\]
  done clear
  B)
  \[a=1,b=1,c=-2\]
  done clear
  C)
  \[a=1,b=-2,c=1\]  
  done clear
  D)
  \[a=-1,b=2,c=1\]
  done clear
  View Answer play_arrow

• question_answer4)
  The number of integral values of 'n', for which \[{{n}^{4}}-6{{n}^{2}}+25\] is prime number, is
  A)
  2
  done clear
  B)
  1               
  done clear
  C)
  8
  done clear
  D)
  0
  done clear
  View Answer play_arrow

• question_answer5)
  Find the unit digit of \[({{7}^{95}}-{{3}^{58}})\].
  A)
  6
  done clear
  B)
  4               
  done clear
  C)
  3
  done clear
  D)
  None of these
  done clear
  View Answer play_arrow

• question_answer6)
  The value of x, when \[{{\log }_{3}}\text{ }({{\log }_{2}}x)+2\text{ }{{\log }_{9}}({{\log }_{7}}8)=2\], is:
  A)
  243
  done clear
  B)
  27             
  done clear
  C)
  343
  done clear
  D)
  64
  done clear
  View Answer play_arrow

• question_answer7)
  If p and q are order and degree of differential equation \[{{y}^{2}}{{\left( \frac{{{d}^{2}}y}{d{{x}^{2}}} \right)}^{2}}+3x{{\left( \frac{dy}{dx} \right)}^{1/3}}+{{x}^{2}}{{y}^{2}}=\sin \,x\], then:
  A)
  \[p>q\]
  done clear
  B)
  \[\frac{p}{q}=\frac{1}{2}\]
  done clear
  C)
  \[p=q\]
  done clear
  D)
  \[p<q\]
  done clear
  View Answer play_arrow

• question_answer8)
  The coefficient of \[{{x}^{n}}\] in polynomial \[(x{{+}^{2n+1}}{{C}_{0}})(x{{+}^{2n+1}}{{C}_{1}}).....(x{{+}^{2n+1}}{{C}_{n}})\] is -
  A)
  \[2n+1\]
  done clear
  B)
  \[{{2}^{2n+1}}-1\]
  done clear
  C)
  \[{{2}^{2n}}\]
  done clear
  D)
  none of these
  done clear
  View Answer play_arrow

• question_answer9)
  The sides of a rectangle are chosen at random, each less than 10 cm, all such lengths being equally likely. The chance that the diagonal of the rectangle is less than 10 cm is
  A)
  1/10
  done clear
  B)
  1/20            
  done clear
  C)
  \[\pi /4\]
  done clear
  D)
  \[\pi /8\]
  done clear
  View Answer play_arrow

• question_answer10)
  In a triangle ABC, angle 8 < angle C and the values of B & C satisfy the equation \[2\tan x-k(1+{{\tan }^{2}}x)=0\] where \[(0<k<1)\]. Then the measure of angle A is:
  A)
  \[\pi /3\]
  done clear
  B)
  \[2\pi /3\]
  done clear
  C)
  \[\pi /2\]
  done clear
  D)
  \[3\pi /4\]
  done clear
  View Answer play_arrow

• question_answer11)
  The set of all values of the parameter 'a' for which the function; \[f(x)=8ax-a\text{ }\sin \text{ }6x-7x-\sin \text{ }5x\] increases & has no critical points for all \[x\in R\], is
  A)
  [-1, 1]
  done clear
  B)
  \[(-\infty ,-6)\]
  done clear
  C)
  \[(6,+\infty )\]
  done clear
  D)
  \[[6,+\infty )\]   
  done clear
  View Answer play_arrow

• question_answer12)
  If \[x=2+{{2}^{2/3}}+{{2}^{1/3}}\], then the value of \[{{x}^{3}}-6{{x}^{2}}+6x\] is
  A)
  3
  done clear
  B)
  2               
  done clear
  C)
  1         
  done clear
  D)
  None of these
  done clear
  View Answer play_arrow

• question_answer13)
  The ratio of the roots of the equation \[a{{x}^{2}}+bx+c=0\] is same as the ratio of the roots of the equation \[A{{x}^{2}}+Bx+C=0\]. If \[{{D}_{1}}\] and \[{{D}_{2}}\] are the discriminants of \[a{{x}^{2}}+bx+c=0\] and \[A{{x}^{2}}+Bx+C=0\] respectively, then \[{{D}_{1}}:{{D}_{2}}=\]
  A)
  \[\frac{{{a}^{2}}}{{{A}^{2}}}\]
  done clear
  B)
  \[\frac{{{b}^{2}}}{{{B}^{2}}}\]
  done clear
  C)
  \[\frac{{{c}^{2}}}{{{C}^{2}}}\]       
  done clear
  D)
  None of these
  done clear
  View Answer play_arrow

• question_answer14)
  Number of ways in which 6 different toys can be distributed In 5 children. If exactly one child does not get any toy
  A)
  1200
  done clear
  B)
  2400           
  done clear
  C)
  240
  done clear
  D)
  300
  done clear
  View Answer play_arrow

• question_answer15)
  If the tangents at the point P on the circle \[{{x}^{2}}+{{y}^{2}}+6x+6y=2\] meets the straight line \[5x-2y+6=0\] at a point Q on the y axis, then the length of PQ is
  A)
  4
  done clear
  B)
  \[2\sqrt{5}\]              
  done clear
  C)
  5
  done clear
  D)
  \[3\sqrt{5}\]
  done clear
  View Answer play_arrow

• question_answer16)
  If \[z=\frac{1}{2}(i\sqrt{3}-1)\], then the value of \[(z-{{z}^{2}}+2{{z}^{3}})(2-z+{{z}^{2}})\] is
  A)
  3
  done clear
  B)
  7                
  done clear
  C)
  \[-1\]
  done clear
  D)
  5
  done clear
  View Answer play_arrow

• question_answer17)
  Let \[\Delta =\left| \begin{matrix}    \sin \theta \cos \phi  & \sin \theta \sin \phi  & \cos \theta   \\    \cos \theta \cos \phi  & \cos \theta \sin \phi  & -\sin \theta   \\    -\sin \theta \sin \phi  & \sin \theta \cos \phi  & 0  \\ \end{matrix} \right|\], then
  A)
  \[\Delta \] is independent of \[\theta \]
  done clear
  B)
  \[\Delta \] is independent of \[\phi \]
  done clear
  C)
  \[\Delta \] is a constant
  done clear
  D)
  none of these
  done clear
  View Answer play_arrow

• question_answer18)
  Let n be number of ordered pairs (x, y) of integers such that \[0<x<y<100\] and A.M. of x and y exceeds their GM by 2. n is equal to
  A)
  5
  done clear
  B)
  7               
  done clear
  C)
  9              
  done clear
  D)
  8
  done clear
  View Answer play_arrow

• question_answer19)
  Number of negative integeral solution of the equation \[[[x]-2x]<4\] is (where [.] denotes greatest integer function)
  A)
  1
  done clear
  B)
  2              
  done clear
  C)
  3
  done clear
  D)
  4
  done clear
  View Answer play_arrow

• question_answer20)
  The coplanar points A, B , C , D are \[(2-x,2,2)\], \[(2,2-y,2)\],\[(2,2,2-z)\] and (1,1,1) respectively, then
  A)
  \[\frac{1}{x}+\frac{1}{y}+\frac{1}{z}=1\]       
  done clear
  B)
  \[x+y+z=1\]
  done clear
  C)
  \[\frac{1}{1-x}+\frac{1}{1-y}+\frac{1}{1-z}=1\]
  done clear
  D)
  None of these
  done clear
  View Answer play_arrow

• question_answer21)

  Two infinitely large charged planes having uniform surface charge density \[+\sigma \] and \[-\sigma \] are plane along x-y plane and \[yz\] plane respectively as shown in the figure. Then the nature of electric lines of forces in x-z plane is given by :

  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer22)

  In the circuit shown in the figure, the potential difference between B and C is :

  A)
  0.1 V
  done clear
  B)
  2V
  done clear
  C)
  0.5 V
  done clear
  D)
  4.25 V
  done clear
  View Answer play_arrow

• question_answer23)
  An \[\alpha \] particle is moving along a circle of radius R with a constant angular velocity \[\omega .\] Point A lies in the same plane at a distance 2R from the centre. Point A records magnetic field produced by \[\alpha \] particle. If the minimum time interval between two successive times at which A records zero magnetic field is \['t',\] the angular speed \[\omega ,\] in terms of t is :
  A)
  \[\frac{2\pi }{t}\]
  done clear
  B)
  \[\frac{2\pi }{3t}\] 
  done clear
  C)
  \[\frac{\pi }{3t}\]           
  done clear
  D)
  \[\frac{\pi }{t}\]
  done clear
  View Answer play_arrow

• question_answer24)

  Radius of a circular ring is changing with time and the coil is placed in uniform constant magnetic field perpendicular to its plane. The variation of \['r'\] with time \['t'\] is shown in the figure. Then induced e.m.f. \[\varepsilon \] with time will be best represented by.

  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer25)

  Three identical capacitors are given a charge Q each and they are then allowed to discharge through resistance \[{{R}_{1}},\] \[{{R}_{2}}\] and \[{{R}_{3}}\] separately. Their charges, as a function of time are shown in the graph below. The smallest of the three resistances is:

  A)
  \[{{R}_{3}}\]
  done clear
  B)
  \[{{R}_{2}}\]
  done clear
  C)
  \[{{R}_{1}}\]
  done clear
  D)
  Cannot be predicted
  done clear
  View Answer play_arrow

• question_answer26)

  AB is small object dipped in water at a depth of d. Its length is \[\ell .\] It is seen from air at near normal incidence. The length of the image is :

  A)
  \[\ell \]
  done clear
  B)
  \[\mu \ell \]
  done clear
  C)
  \[\ell /\mu \]
  done clear
  D)
  None of these
  done clear
  View Answer play_arrow

• question_answer27)

  Two coherent light sources P and Q each of wavelength \[\lambda \] are separated by a distance \[3\lambda \] as shown. The maximum number of minima formed on line AB which runs from \[-\,\infty \] to \[\varphi \phi \] is:

  A)
  2
  done clear
  B)
  4   
  done clear
  C)
  6         
  done clear
  D)
  8
  done clear
  View Answer play_arrow

• question_answer28)
  For a LCR series circuit with an A.C. source of angular frequency \[\omega .\]
  A)
  Circuit will be capacitive if \[\omega >\frac{1}{\sqrt{LC}}\]
  done clear
  B)
  Circuit will be inductive if \[\omega =\frac{1}{\sqrt{LC}}\]
  done clear
  C)
  Power factor of circuit will be unity if capacitive reactance equals inductive reactance
  done clear
  D)
  Current will be leading voltage if \[\omega >\frac{1}{\sqrt{LC}}\]
  done clear
  View Answer play_arrow

• question_answer29)
  A heavy nucleus having mass number 200 gets disintegrated into two small fragments of mass number 80 and 120. If binding energy per nucleon for parent atom is 6.5 MeV and for daughter nuclei is 7 MeV and 8 MeV respectively, then the energy released in the decay will be:
  A)
  200 MeV
  done clear
  B)
  \[-\,220\]MeV
  done clear
  C)
  220 MeV          
  done clear
  D)
  180 MeV
  done clear
  View Answer play_arrow

• question_answer30)

  A rod of length \[\ell \] is in motion such that its ends A and B are moving along x-axis and y-axis respectively. It is given that \[\frac{d\theta }{dt}=2\] rad/s always. P is a fixed point on the rod. Let \[M\] be the projection of \[P\] on x-axis. For the time interval in which \[\theta \] changes from 0 to \[\frac{\pi }{2}\] choose the correct statement:

  A)
  The acceleration of \[M\] is always directed towards right
  done clear
  B)
  \[M\] executes SHM
  done clear
  C)
  \[M\] moves with constant speed
  done clear
  D)
  \[M\] moves with constant acceleration
  done clear
  View Answer play_arrow

• question_answer31)
  The molar heat capacity of a polytropic process \[(P{{V}^{n}})\] is \[C={{C}_{V}}+\frac{R}{10}.\] The value of the polytropic exponent n is:
  A)
  11
  done clear
  B)
  10
  done clear
  C)
  \[-10\]   
  done clear
  D)
  \[-9\]
  done clear
  View Answer play_arrow

• question_answer32)
  When a wave is refracted by rarer medium:
  A)
  phase must change
  done clear
  B)
  amplitude must change
  done clear
  C)
  frequency must change
  done clear
  D)
  None of these
  done clear
  View Answer play_arrow

• question_answer33)
  A small mass slides down an inclined plane of inclination \[\theta \] with the horizontal. The co-efficient of friction is \[\mu ={{\mu }_{0}}\,\,x\] where x is the distance through which the mass slides down and \[{{\mu }_{0}}\] a constant. Then the speed is maximum after the mass covers a distance of:
  A)
  \[\frac{\cos \theta }{{{\mu }_{0}}}\]
  done clear
  B)
  \[\frac{\sin \theta }{{{\mu }_{0}}}\]
  done clear
  C)
  \[\frac{\tan \theta }{{{\mu }_{0}}}\]
  done clear
  D)
  \[\frac{2\tan \theta }{{{\mu }_{0}}}\]
  done clear
  View Answer play_arrow

• question_answer34)
  A source of frequency \['f'\] is stationary and an observer starts moving towards it at t = 0 with constant small acceleration. Then the variation of observed frequency f' registered by the observer with time is best represented as:
  A)
  
  done clear
  B)
  
  done clear
  C)
   
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer35)
  A tunnel is dug in the earth across one of its diameter. Two masses \['m'\] & \['2m'\] are dropped from the ends of the tunnel. The masses collide and stick to each other and perform S.H.M. Then amplitude of S.H.M. will be [R = radius of the earth]
  A)
  R
  done clear
  B)
  R/2  
  done clear
  C)
  R/3
  done clear
  D)
  2R/3
  done clear
  View Answer play_arrow

• question_answer36)

  A small uniform tube is bent into a circular tube of radius R and kept in the vertical plane. Equal volumes of two liquids of densities \[\rho \] and \[\sigma \,\,(\rho >\sigma )\] fill half of the tube as shown. \[\theta \] is the angle which the radius passing through the interface makes with the vertical:

  A)
  \[\theta =ta{{n}^{-1}}\left( \frac{\rho -\sigma }{\rho +\sigma } \right)\]
  done clear
  B)
  \[\theta =ta{{n}^{-1}}\left( \frac{\sigma -\rho }{\sigma +\rho } \right)\]
  done clear
  C)
  \[\theta =ta{{n}^{-1}}\left( \frac{\rho }{\rho +\sigma } \right)\]
  done clear
  D)
  \[\theta =ta{{n}^{-1}}\left( \frac{\rho }{\rho -\sigma } \right)\]
  done clear
  View Answer play_arrow

• question_answer37)
  All electrons ejected from a surface by incident light of wavelength 200 nm can be stopped before travelling 1 \[m\] in the direction of uniform electric field of 4 N/C. The work function of the surface is:                                 
  A)
  4 eV
  done clear
  B)
  6.2 eV
  done clear
  C)
  2 eV     
  done clear
  D)
  2.2 eV
  done clear
  View Answer play_arrow

• question_answer38)

  A point mass \['m'\] and charge \['q'\]is projected with a velocity v towards a stationary charge \[{{Q}_{0}}\] from a distance of \[2\text{ }m.\] The closest distance that q can approach is: \[\left[ k=\frac{1}{4\pi {{\varepsilon }_{0}}} \right]\]

  A)
  \[\frac{m{{v}^{2}}+kq{{Q}_{0}}}{k{{Q}_{0}}q}\]
  done clear
  B)
  \[\frac{K{{Q}_{0}}}{m{{v}^{2}}+kq{{Q}_{0}}}\]
  done clear
  C)
  \[\frac{k{{Q}_{0}}+m{{v}^{2}}}{kq{{Q}_{0}}}\]
  done clear
  D)
  \[\frac{k{{Q}_{0}}-m{{v}^{2}}}{kq{{Q}_{0}}}\]
  done clear
  View Answer play_arrow

• question_answer39)
  The magnetic flux \[\phi \] through a metal ring varies with time t according to: \[\phi =3\,\,(a{{t}^{3}}-b{{t}^{2}})T{{m}^{2}},\] with \[a=2{{s}^{-3}}\] and \[b=6{{s}^{-2}}\]. The resistance of the ring is \[3\Omega .\]. The maximum current induced in the ring during the interval t = 0 to t = 2s, is:
  A)
  1 A
  done clear
  B)
  2 A
  done clear
  C)
  3 A      
  done clear
  D)
  6 A
  done clear
  View Answer play_arrow

• question_answer40)
  A coin is released inside a lift at a height of 2 m from the floor of the lift. The height of the lift is 10 m. The lift is moving   with   an   acceleration   of \[9\text{ }m/{{s}^{2}}\] down wards. The time after which the coin will strike with the lift is: \[(g=10\text{ }m/{{s}^{2}}):\]
  A)
  4 s
  done clear
  B)
  2 s
  done clear
  C)
  \[\frac{4}{\sqrt{21}}s\]
  done clear
  D)
  \[\frac{2}{\sqrt{11}}\,\,s\]
  done clear
  View Answer play_arrow

• question_answer41)
  The maximum number of possible oxidation states of actinoides are shown by:
  A)
  nobelium\[(No)\]and lawrencium\[(Lr)\]
  done clear
  B)
  neptunium \[(Np)\]and plutonium \[(Pu)\]
  done clear
  C)
  actinium\[(Ac)\]and thorium\[(Th)\]
  done clear
  D)
  berkelium \[(Bk)\]and californium\[(Cf)\]
  done clear
  View Answer play_arrow

• question_answer42)
  In the following reaction carbonyl compound \[+MeOHacetal\] Rate of the reaction is the highest for:
  A)
  Propanal as substrate and methanol in stoichiometric amount
  done clear
  B)
  Propanal as substrate and methanol in excess
  done clear
  C)
  Acetone as substrate and methanol in stoichio-metric amount
  done clear
  D)
  Acetone as substrate and methanol in excess
  done clear
  View Answer play_arrow

• question_answer43)
  Among the following species, the diamagnetic molecule is:
  A)
  \[NO\]
  done clear
  B)
  \[{{O}_{2}}\]
  done clear
  C)
  \[CO\]  
  done clear
  D)
  \[{{B}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer44)

  The correct statements among I to III regarding group 13 element oxides are,

  (I) Boron trioxide is acidic.

  (II) Oxides of aluminium and gallium are amphoteric.

  (Ill) Oxides of indium and thallium are basic.

  A)
  (I) and (II) only
  done clear
  B)
  (I) and (III) only
  done clear
  C)
  (II) and (III) only 
  done clear
  D)
  (I), (II) and (III) only
  done clear
  View Answer play_arrow

• question_answer45)
  A solution of \[Ni{{(N{{O}_{3}})}_{2}}\] is electrolysed between platinum electrodes using 0.1 Faraday electricity. How many mole of Ni will be deposited at the cathode?
  A)
  0.10
  done clear
  B)
  0.05
  done clear
  C)
  0.20
  done clear
  D)
  0.15
  done clear
  View Answer play_arrow

• question_answer46)
  Molal depression constant for a solvent is 4.0 K kg \[mo{{l}^{-1}}.\] The depression in the freezing point of the solvent for\[0.03\text{ }mol\text{ }k{{g}^{-1}}\] solution of \[{{K}_{2}}OS{{O}_{4}}\] is: (Assume complete dissociation of the electrolyte)
  A)
  0.36 K
  done clear
  B)
  0.18 K
  done clear
  C)
  0.12 K
  done clear
  D)
  0.24 K
  done clear
  View Answer play_arrow

• question_answer47)

  In an acid-base titration, \[0.1\text{ }M\text{ }HCl\] solution was added to the\[NaOH\] solution of unknown strength. Which of the following correctly shows the change of pH of the titration mixture in this experiment?
  [a]	[b]
  [c]	[d]

  A)
  [c]
  done clear
  B)
  [b]
  done clear
  C)
  [a] 
  done clear
  D)
  [d]
  done clear
  View Answer play_arrow

• question_answer48)

  The correct statements among I to III are:

  (I) Valence bond theory cannot explain the colour exhibited by transition metal complexes.

  (II) Valence bond theory can predict quantitatively the magnetic properties of transition metal complexes.

  (Ill) Valennce bond theory cannot distinguish ligands as weak and strong field ones.

  A)
  (I), (II) and (III)
  done clear
  B)
  (II) and (III) only
  done clear
  C)
  (I) and (II) only
  done clear
  D)
  (I) and (III) only
  done clear
  View Answer play_arrow

• question_answer49)

  Increasing order of reactivity of the following compounds for \[{{S}_{N}}1\] substitution is:
  [a]	[b]
  [c]	[d]

  A)
  [a] < [b] < [d] <[c]       
  done clear
  B)
  [b] < [c] < [d] < [a]
  done clear
  C)
  [b] < [c] < [a] < [d]      
  done clear
  D)
  [b] < [a] < [d] < [c]
  done clear
  View Answer play_arrow

• question_answer50)
  HF has highest boiling point among hydrogen halides, because it has:
  A)
  lowest ionic character
  done clear
  B)
  lowest dissociation enthalpy
  done clear
  C)
  strongest van der Waals interactions
  done clear
  D)
  strongest hydrogen bonding
  done clear
  View Answer play_arrow

• question_answer51)
  The major product of the following reaction is:
  A)
             
  done clear
  B)
   
  done clear
  C)
             
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer52)

  The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are:

  A)
  6 and 6
  done clear
  B)
  8 and 8
  done clear
  C)
  8 and 6          
  done clear
  D)
  6 and 8
  done clear
  View Answer play_arrow

• question_answer53)
  Noradrenaline is a/an:
  A)
  Antacid
  done clear
  B)
  Antihistamine
  done clear
  C)
  Antidepressant
  done clear
  D)
  Neurotransmitter
  done clear
  View Answer play_arrow

• question_answer54)
  What would be the molality of 20% (mass/mass) aqueous solution of \[KI?\] (molar mass of \[KI=166\text{ }g\text{ }mo{{l}^{-1}}\])
  A)
  1.51
  done clear
  B)
  1.35
  done clear
  C)
  1.08
  done clear
  D)
  1.48
  done clear
  View Answer play_arrow

• question_answer55)
  The peptide that gives positive eerie ammonium nitrate and carbylamine tests is:
  A)
  Gin - Asp
  done clear
  B)
  Asp - Gin
  done clear
  C)
  Ser - Lys
  done clear
  D)
  Lys - Asp
  done clear
  View Answer play_arrow

• question_answer56)
  10 mL of 1 mM surfactant solution forms a monolayer covering \[0.24\text{ }c{{m}^{2}}\] on a polar substrate. If the polar head is approximated as a cube, what is its edge length?
  A)
  2.0 nm
  done clear
  B)
  0.1 nm
  done clear
  C)
  2.0 pm
  done clear
  D)
  1.0 pm
  done clear
  View Answer play_arrow

• question_answer57)
  Which of the following compounds is a constituent of the polymer \[{{[HN-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-NH-C{{H}_{2}}]}_{N}}\]?
  A)
  N-Methyl urea
  done clear
  B)
  Ammonia
  done clear
  C)
  Formaldehyde   
  done clear
  D)
  Methylamine
  done clear
  View Answer play_arrow

• question_answer58)
  p-Hydroxybenzophenone upon reaction with bromine in carbon tetrachloride gives :
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer59)
  Hinsberg' reagent is:
  A)
  \[SOC{{l}_{2}}\]
  done clear
  B)
  \[{{(COCl)}_{2}}\]
  done clear
  C)
  \[{{C}_{6}}{{H}_{5}}COCl\]
  done clear
  D)
  \[{{C}_{6}}{{H}_{5}}S{{O}_{2}}Cl\]
  done clear
  View Answer play_arrow

• question_answer60)
  Which of the following potential energy (PE) diagrams represents the \[{{S}_{N}}1\] reaction?
  A)
  
  done clear
  B)
  
  done clear
  C)
   
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer61)
  How many moles of carbon dioxide are produced by the complete oxidation of 1 mole of pyruvate?
  A)
  1
  done clear
  B)
  2
  done clear
  C)
  3
  done clear
  D)
  4
  done clear
  View Answer play_arrow

• question_answer62)
  Which of the following is essential mineral element and is not a constituent of any enzyme but stimulates the activity of many enzymes?
  A)
  Zn
  done clear
  B)
  Mg
  done clear
  C)
  Mn
  done clear
  D)
  K
  done clear
  View Answer play_arrow

• question_answer63)
  Emphysema damages the tissues of the lungs and slows pulmonary blood flow. This causes blood to back up, stretching and weakening the walls of the heart and blood vessels. Which of the following do you think would be most affected by this backup of blood from the lungs?
  A)
  Aorta
  done clear
  B)
  Right atrium
  done clear
  C)
  Left atrium
  done clear
  D)
  Right ventricle
  done clear
  View Answer play_arrow

• question_answer64)
  Algae and other submerged plants float in water during day time and sink at night, because
  A)
  They come up to enjoy some time.
  done clear
  B)
  They lose weight at night.
  done clear
  C)
  They become buoyant due to accumulation of \[{{O}_{2}}\] as a result of photosynthesis.
  done clear
  D)
  They become light due to food material accumulation.
  done clear
  View Answer play_arrow

• question_answer65)
  The embryo is carefully taken out of pea seed and sown in the soil and watered normally. New plant will
  A)
  Be healthier.
  done clear
  B)
  Be weaker.
  done clear
  C)
  Not be formed
  done clear
  D)
  Be formed normally.
  done clear
  View Answer play_arrow

• question_answer66)
  Centrifugation of a cell results in the rupture of the cell membrane and the contents compacting into a pellet in the bottom of the centrifuge tube. Bathing this pellet with a glucose solution yields metabolic activity including the production of ATP. One of the contents of this pellet is most likely which of the following?
  A)
  Cytosol
  done clear
  B)
  Mitochondria
  done clear
  C)
  Lysosomes
  done clear
  D)
  Golgi bodies
  done clear
  View Answer play_arrow

• question_answer67)
  Sita saw an old Tarzan movie on television. The movie supposedly took place in Africa, but Trina easily spotted that it was not really filmed there. Which of the following could have tipped her off?
  A)
  Chimps like cheetah do not live in Africa.
  done clear
  B)
  The monkeys in the jungle all had prehensile tails.
  done clear
  C)
  There were no lemurs shown in the forest.
  done clear
  D)
  Tarzan wrestled with a gorilla.
  done clear
  View Answer play_arrow

• question_answer68)
  Ectopic pregnancies are referred to as:
  A)
  Implantation of embryo at site other than uterus.
  done clear
  B)
  Implantation of defective embryo in the uterus.
  done clear
  C)
  Pregnancies terminated due to hormonal imbalance.
  done clear
  D)
  Pregnancies with genetic abnormality.
  done clear
  View Answer play_arrow

• question_answer69)

  Consider the following statements. Which of the statements given below are correct?

  (I)  In earlier days, insulin extracted from pancreas of slaughtered cattle and pigs was more efficient than genetically engineered insulin.

  (II) PCR technique is being used for the detection of HIV and genetic mutations, in suspected cancer patients.

  (III) Cystic fibrosis, haemophilia, cancer, Parkinson's disease etc., are treated by gene therapy.

  A)
  (I) and (II)
  done clear
  B)
  (I) and (III)
  done clear
  C)
  (II) and (III)
  done clear
  D)
  (I), (II) and (III)
  done clear
  View Answer play_arrow

• question_answer70)
  Find out the odd one from the given pair.
  A)
  Polysaccharide - Glycosidic bond
  done clear
  B)
  Protein - Peptide bond
  done clear
  C)
  Fat - Ester
  done clear
  D)
  Polynucleotide - Hydrogen bond
  done clear
  View Answer play_arrow

• question_answer71)
  Patients with chronic lung disease and difficulty in breathing often adapt to the high concentration of\[{{\operatorname{CO}}_{2}}\], in their blood. The breathing centres stop responding to\[{{\operatorname{CO}}_{2}}\], level. If such a patient has difficulty in breathing, medical personnel are reluctant to give the patient pure oxygen. Based on what you know about control of breathing, why do you think this is the case?
  A)
  The patient's body would use the oxygen to make even more\[{{\operatorname{CO}}_{2}}\].
  done clear
  B)
  The oxygen would increase concentration of bicarbonate, altering pH.
  done clear
  C)
  Increased oxygen in the blood might slow or stop breathing.
  done clear
  D)
  The body is not used the oxygen, and the patient would overdose.
  done clear
  View Answer play_arrow

• question_answer72)
  What map unit (Centimorgan) is adopted in the construction of genetic maps?
  A)
  A unit of distance between two expressed genes, representing \[10%\] cross over.
  done clear
  B)
  A unit of distance between two expressed genes, representing \[100%\] cross over.
  done clear
  C)
  A unit of distance between genes on chromosomes, representing \[1%\] cross over.
  done clear
  D)
  A unit of distance between genes on chromosomes, representing \[50%\] cross over.
  done clear
  View Answer play_arrow

• question_answer73)

  Identify the molecules [a] and [b] shown below and select the right option giving their source and use.

  [A]

  [B]

  A)

  Molecule	Source	Use
  [A] Cocaine	Erythroxylum coca	Accelerates the transport of dopamine

  done clear
  B)

  Molecule	Source	Use
  [B] Heroin	Cannabis sativa	Depressant

  done clear
  C)

  Molecule	Source	Use
  [B] Cannabinoid	Atropa belladonna	Product hallucinations

  done clear
  D)

  Molecule	Source	Use
  [A] Morphine	Papaver somniferum	Sedative and pain killer

  done clear
  View Answer play_arrow

• question_answer74)
  A zoologist examined an intestine cell from a crayfish and counted 200 chromosomes, each consisting of 2 chromatids, at prophase I of meiosis. What would he expect to see in each of the four cells at telophase II of meiosis if he looked in the crayfish ovary?
  A)
  50 chromosomes, each consisting of 2 chromatids.
  done clear
  B)
  50 chromosomes, each consisting of 1 chromatid
  done clear
  C)
  100 chromosomes, each consisting of 2 chromatids.
  done clear
  D)
  100 chromosomes, each consisting of 1 chromatid.
  done clear
  View Answer play_arrow

• question_answer75)
  For approximately how long during the human female's menstrual cycle, progesterone concentrations are high enough to maintain the uterus in a proper condition for pregnancy?
  A)
  All of the cycle
  done clear
  B)
  None of the cycle
  done clear
  C)
  During the first half of the cycle
  done clear
  D)
  During the second half of the cycle
  done clear
  View Answer play_arrow

• question_answer76)
  Bacteriochlorophyll differs from chlorophyll 'a' in having:
  A)
  One pyrrole nucleus with one hydrogen
  done clear
  B)
  One pyrrole nucleus with two hydrogen
  done clear
  C)
  One pyrrole nucleus with three hydrogen
  done clear
  D)
  One pyrrole nucleus with four hydrogen
  done clear
  View Answer play_arrow

• question_answer77)
  Biosystematics aims at
  A)
  Identification and arrangement of organisms on the basis of their cytological characteristics.
  done clear
  B)
  The classification of organisms based on broad morphological characters.
  done clear
  C)
  Delimiting various taxa of organisms and establishing their relationships.
  done clear
  D)
  The classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies.
  done clear
  View Answer play_arrow

• question_answer78)
  When mitochondria are actively engaged in phosphorylation and electron transport, it is
  A)
  In active state.
  done clear
  B)
  In condensed state.
  done clear
  C)
  Having enlarged intermembrane space.
  done clear
  D)
  all of the above
  done clear
  View Answer play_arrow

• question_answer79)

  Which of the given structures represent Z witter ionic form?

  A)
  A
  done clear
  B)
  C
  done clear
  C)
  B         
  done clear
  D)
  All of these
  done clear
  View Answer play_arrow

• question_answer80)
  When the receptor of a \[{{\operatorname{T}}_{\operatorname{H}}}\] cell binds to a pathogen, being presented on a macrophage it:
  A)
  Activates itself
  done clear
  B)
  Secretes cytokines
  done clear
  C)
  Activates B cells
  done clear
  D)
  All of the above
  done clear
  View Answer play_arrow

• question_answer81)
  The area bounded by the curve \[x=a{{\cos }^{3}}t,y=a\,\,{{\sin }^{3}}t\]is
  A)
  \[\frac{3\pi {{a}^{2}}}{8}\]
  done clear
  B)
  \[\frac{3\pi {{a}^{2}}}{16}\]
  done clear
  C)
  \[\frac{3\pi {{a}^{2}}}{32}\]
  done clear
  D)
  \[3\pi {{a}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer82)
  If is a twice derivable function such that\[f'(2010)=f(2010)=\frac{1}{2010}\] and \[\int\limits_{0}^{2010}{f(x)dx=\frac{3}{2}}\], then \[\int\limits_{0}^{2010}{{{x}^{2}}}f''(x)dx=\]
  A)
  2009
  done clear
  B)
  2010
  done clear
  C)
  2011
  done clear
  D)
  none of these
  done clear
  View Answer play_arrow

• question_answer83)
  If \[A=2{{\tan }^{-1}}(2\sqrt{2}-1)\], and \[B={{\sin }^{-1}}\left( \frac{1}{3} \right)+{{\sin }^{-1}}\left( \frac{3}{5} \right)\] then
  A)
  \[A>B\]
  done clear
  B)
  \[A=B\]
  done clear
  C)
  \[A<B\]            
  done clear
  D)
  none of these
  done clear
  View Answer play_arrow

• question_answer84)
  Let \[f:R\to R\] \[f(x)=\sqrt{4{{x}^{2}}+28x+85}+\sqrt{4{{x}^{2}}-28x+113}\] The minimum value off is-
  A)
  96
  done clear
  B)
  14    
  done clear
  C)
  \[96\sqrt{2}\]
  done clear
  D)
  \[14\sqrt{2}\]
  done clear
  View Answer play_arrow

• question_answer85)
  Let f be a function defined from \[{{R}^{+}}\to {{R}^{+}}\]. 'If \[{{(f(xy))}^{2}}=x{{(f(y))}^{2}}\] for all positive numbers x and y and \[f(2)=6\], then \[f(50)\] is equal to
  A)
  10
  done clear
  B)
  30   
  done clear
  C)
  40
  done clear
  D)
  50
  done clear
  View Answer play_arrow

• question_answer86)
  The vectors \[\overrightarrow{a}=-4\hat{i}+3\hat{k},\,\,\overrightarrow{b}=14\hat{i}+2\hat{j}-5\hat{k}\] are co-initial. The vector \[\overrightarrow{d}\] which is bisecting the angle between the vectors \[\overrightarrow{a}\] and \[\overrightarrow{b}\] and is having the magnitude \[\sqrt{6}\], is
  A)
  \[\hat{i}+\hat{j}+2\hat{k}\]
  done clear
  B)
  \[\hat{i}-\hat{j}+2\hat{k}\]
  done clear
  C)
  \[\hat{i}+\hat{j}-2\hat{k}\]
  done clear
  D)
  none
  done clear
  View Answer play_arrow

• question_answer87)

  A continuous function f(x) satisfying

  (i) \[{{x}^{4}}-4{{x}^{2}}\le f(x)\le 2{{x}^{2}}-{{x}^{3}}\]

  (il) area bounded by\[y=f(x),\text{ }y={{x}^{4}}-4{{x}^{2}},\], y - axis and line \[x=t(0\,\,\le \,\,t\,\,\le \,\,2)\] is k times the area bounded by\[y=f(x),\,\,y=2{{x}^{2}}-{{x}^{3}}\], y - axis and line \[x=t(0\le t\le 2)\], is given as

  A)
  \[f(x)=\frac{{{x}^{4}}-k{{x}^{3}}+(2k-4){{x}^{2}}}{1+k}\]
  done clear
  B)
  \[f(x)=\frac{{{x}^{4}}+{{x}^{3}}+k{{x}^{2}}}{k+1}\]
  done clear
  C)
  \[f(x)=\frac{k{{x}^{4}}-{{x}^{3}}-2k{{x}^{2}}}{k+1}\]
  done clear
  D)
  \[f(x)=\frac{k}{k+1}({{x}^{4}}-{{x}^{2}})\]
  done clear
  View Answer play_arrow

• question_answer88)
  If \[x=\frac{n\pi }{2}\], satisfies the equation \[\sin \frac{x}{2}-\cos \frac{x}{2}=1-\sin x\] and the inequality \[\left| \frac{x}{2}-\frac{\pi }{2} \right|\le \frac{3\pi }{4}\], then
  A)
  \[n=-1,0,3,5\]
  done clear
  B)
  \[n=1,2,4,5\]
  done clear
  C)
  \[n=0,2,4\]
  done clear
  D)
  \[n=-1.1,3,5\]
  done clear
  View Answer play_arrow

• question_answer89)
  Let \[{{d}_{1}}\text{, }{{d}_{2}}\,,.............\text{ }{{d}_{k}}\] be all the divisors of a positive Integer n including 1 and n. Suppose\[{{d}_{1}}+{{d}_{2}}+...+{{d}_{k}}=72\]. Then the value of \[\frac{1}{{{d}_{1}}}+\frac{1}{{{d}_{2}}}+......+\frac{1}{{{d}_{k}}}\] is
  A)
  \[\frac{{{k}^{2}}}{72}\]
  done clear
  B)
  \[\frac{72}{k}\]
  done clear
  C)
  \[\frac{72}{n}\]
  done clear
  D)
  none of these
  done clear
  View Answer play_arrow

• question_answer90)
  The 288th term of the series a, b, b, c, c, c, d, d, d, d, e, e, e, e, e, f, f, f, t, f, f,.............. is
  A)
  u
  done clear
  B)
  v              
  done clear
  C)
  w
  done clear
  D)
  x
  done clear
  View Answer play_arrow

• question_answer91)

  In the figure given below, the end B of the rod AB which makes angle \[\theta \] with the floor is pulled with a constant velocity \[{{v}_{0}}\] as shown. The length of rod is \[\ell .\] At an instant when \[\theta =37{}^\circ \]

  A)
  Velocity of end A is \[\frac{4{{v}_{0}}}{3}\]
  done clear
  B)
  Angular velocity of rod is \[\frac{5{{v}_{0}}}{6\ell }\]
  done clear
  C)
  Angular velocity of rod is constant
  done clear
  D)
  Velocity of end A is constant
  done clear
  View Answer play_arrow

• question_answer92)

  A solid sphere of mass M and radius R is placed on a smooth horizontal surface. It is given a horizontal impulse J at a height h above the centre of mass and sphere starts rolling then, the value of h and speed of centre of mass are -

  A)
  \[h=\frac{2}{3}R\] and \[v=\frac{J}{M}\]
  done clear
  B)
  \[h=\frac{2}{5}R\]  and \[v=\frac{2}{5}\frac{J}{M}\]
  done clear
  C)
  \[h=\frac{7}{5}R\] and \[v=\frac{7}{5}\frac{J}{M}\]
  done clear
  D)
  \[h=\frac{7}{5}R\] and \[v=\frac{J}{M}\]
  done clear
  View Answer play_arrow

• question_answer93)

  In the diagram shown, the charge +Q is fixed. Another charge +2q, is projected from a distance R from the fixed charge. Minimum separation between the two charges if the velocity becomes \[\frac{1}{\sqrt{3}}\] times of the projected velocity, at this moment is (Assume gravity to be absent) -

  A)
  \[\frac{\sqrt{3}}{2}R\]
  done clear
  B)
  \[\sqrt{3}\,R\] 
  done clear
  C)
  \[\frac{1}{2}R\]
  done clear
  D)
  \[4R\]
  done clear
  View Answer play_arrow

• question_answer94)

  If force constant of spring is \[k=\frac{2mg}{\ell }\] and now mass m is displaced down ward from equilibrium and released. Then time period will be-

  A)
  \[2\pi \sqrt{\frac{\ell }{2g}}\]
  done clear
  B)
  \[2\pi \sqrt{\frac{\ell }{g}}\]
  done clear
  C)
  \[\frac{4\pi }{3}\sqrt{\frac{\ell }{2g}}+\sqrt{\frac{6\ell }{g}}\]
  done clear
  D)
  \[\pi \sqrt{\frac{\ell }{2g}}+\sqrt{\frac{8\ell }{g}}\]
  done clear
  View Answer play_arrow

• question_answer95)
  At t=0 the no of active nuclei in radioactive is number is \[{{N}_{0}}\] if decay constant is \[\lambda \] and rate of formation of isotope is K. Then number of active nuclei-
  A)
  first increases then decreasing
  done clear
  B)
  Goes on increasing
  done clear
  C)
  Goes on decreasing
  done clear
  D)
  Is \[\frac{K}{\lambda }\] after long time
  done clear
  View Answer play_arrow

• question_answer96)

  A container of dimension \[4m\,\,\times \,\,3m\,\,\times \,\,2m\] starts to move with uniform acceleration \[a=1.25\text{ }m/{{s}^{2}}\] at t = 0. The volume of liquid in vessel is \[18\text{ }{{m}^{3}}.\] The speed of liquid coming out from a very small orifice made at bottom of right side wall just after acceleration of container -

  A)
  zero      
  done clear
  B)
  \[\sqrt{30}\,\,m/sec\]
  done clear
  C)
  5 m/s
  done clear
  D)
  10 m/s
  done clear
  View Answer play_arrow

• question_answer97)
  120 g of ice at \[0{}^\circ C\] is mixed with 100 g of water at \[80{}^\circ C.\] Latent heat of fusion is 80cal/g and specific heat of water is \[1\,\,cal/g{}^\circ C.\] The final temperature of the mixture is -
  A)
  \[0{}^\circ C\]
  done clear
  B)
  \[40{}^\circ C\]
  done clear
  C)
  \[20{}^\circ C\]
  done clear
  D)
  \[10{}^\circ C\]
  done clear
  View Answer play_arrow

• question_answer98)
  A stone of mass 1 kg is tied to a string 4 m long and is rotated at constant speed of \[40\text{ }m{{s}^{-1}}\] in a vertical circle. The ratio of the tension at the top and the bottom is-
  A)
  11 : 12
  done clear
  B)
  39 : 41
  done clear
  C)
  41 : 39
  done clear
  D)
  12 :11
  done clear
  View Answer play_arrow

• question_answer99)
  A magnet is suspended in the magnetic meridian with an untwisted wire. The upper end of the wire is rotated through \[180{}^\circ \] to deflect the magnet by \[30{}^\circ \] from magnetic meridian. Now this magnet is replaced by another magnet and the upper end of the wire has to be rotated through \[270{}^\circ \] to deflect the magnet by \[30{}^\circ \] from magnetic meridian. The ratio of magnetic moments of the two magnet is -
  A)
  1 : 1
  done clear
  B)
  \[\frac{2}{3}\]    
  done clear
  C)
  \[\frac{3}{2}\]  
  done clear
  D)
  \[\frac{5}{8}\]
  done clear
  View Answer play_arrow

• question_answer100)

  The time at which current in \[{{R}_{2}}\] becomes half of the steady value of current when the circuit is switched on at t = 0:

  A)
  1.03 ms
  done clear
  B)
  1.40 ms
  done clear
  C)
  2.09 ms
  done clear
  D)
  3.19 ms
  done clear
  View Answer play_arrow

• question_answer101)
  The structures of beryllium chloride in the solid state and vapour phase, respectively, are:
  A)
  chain and chain
  done clear
  B)
  dimeric and dimeric
  done clear
  C)
  dimeric and chain
  done clear
  D)
  chain and dimeric
  done clear
  View Answer play_arrow

• question_answer102)
  Assertion : For the extraction of iron, haematite ore is used. Reason : Haematite is a carbonate ore of iron.
  A)
  Both the assertion and reson are correct, but the reason is not the correct explanation for the assertion.
  done clear
  B)
  Both the assertion and reason are correct and the reason is the correct explanation for the assertion.
  done clear
  C)
  Only the reason is correct.
  done clear
  D)
  Only the assertion is correct.
  done clear
  View Answer play_arrow

• question_answer103)
  During compression of a spring the work done is 10 kJ and 2 kJ escaped to the surroundings as heat. The change in internal energy, \[\Delta U\](in kJ) is:
  A)
  12
  done clear
  B)
   \[-8\]
  done clear
  C)
  8
  done clear
  D)
  \[-12\]
  done clear
  View Answer play_arrow

• question_answer104)
  At a given temperature T, gases Ne, Ar, Xe and Kr are found to deviate from ideal gas behaviour. Their equation of state is given as \[P=\frac{RT}{V-b}\] at T.
  A)
  Kr
  done clear
  B)
  Ar
  done clear
  C)
  Xe
  done clear
  D)
  Ne
  done clear
  View Answer play_arrow

• question_answer105)
  The one that is not a carbonate ore is:
  A)
  malachite
  done clear
  B)
  bauxite
  done clear
  C)
  calamine
  done clear
  D)
  siderite
  done clear
  View Answer play_arrow

• question_answer106)
  The amorphous form of silica is:
  A)
  kieselguhr
  done clear
  B)
  tridymite
  done clear
  C)
  cristobalite
  done clear
  D)
  quartz
  done clear
  View Answer play_arrow

• question_answer107)
  Which one of the following about an electron occupying the is orbital in a hydrogen atom is incorrect? (The Bohr radius is represented by \[{{a}_{0}}\]).
  A)
  The magnitude of the potential energy is double that of its kinetic energy on an average.
  done clear
  B)
  The probability density of finding the electron is maximum at the nucleus.
  done clear
  C)
  The total energy of the electron is maximum when it is at a distance\[{{a}_{0}}\]from the nucleus.
  done clear
  D)
  The electron can be found at a distance\[2{{a}_{0}}\]from the nucleus.
  done clear
  View Answer play_arrow

• question_answer108)
  The layer of atmosphere between 10 km to 50 km above the sea level is called as:
  A)
  troposphere
  done clear
  B)
  thermosphere
  done clear
  C)
  stratosphere
  done clear
  D)
  mesosphere
  done clear
  View Answer play_arrow

• question_answer109)

  Consider the given plot of enthalpy of the following reaction between\[A\]and\[B.A+B\to C+D.\] Identify the incorrect statement,

  A)
  C is the thermodynamically stable product
  done clear
  B)
  Formation of A and B form C has highest enthalpy of activation.
  done clear
  C)
  Activation enthalpy to form C is\[5\,kJ\,mo{{l}^{-1}}\]
  done clear
  D)
  D is kinetically stable product.
  done clear
  View Answer play_arrow

• question_answer110)

  The major products A and B for the following reactions are, respectively:

  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer111)
  Brown \[({{y}^{+}})\] is dominant over yellow body colour (y) and red eyes \[({{w}^{+}})\] is dominant over white eyes (w). Both are carried on X chromosome. What is the genotype of a male Drosophila fly that has yellow body colour and red eyes?
  A)
  \[{{\operatorname{X}}^{w+y}}Y\]
  done clear
  B)
  \[{{\operatorname{X}}^{wy}}Y\]
  done clear
  C)
  \[{{\operatorname{X}}^{wy+}}Y\]
  done clear
  D)
  \[{{\operatorname{X}}^{wy+}}{{\operatorname{X}}^{wy+}}Y\]
  done clear
  View Answer play_arrow

• question_answer112)
  Select the incorrect match.
  A)
  Lampbrush - Diplotene bivalents Chromosomes
  done clear
  B)
  Allosomes - Sex chromosomes
  done clear
  C)
  Polytene - Oocytes of amphibians Chromosomes
  done clear
  D)
  Submetacentric   - L-shaped chromosomes Chromosomes
  done clear
  View Answer play_arrow

• question_answer113)
  A synthetically prepared mRNA contains repetitive AU sequences. The mRNA was incubated with mammalian cell extract which contains ribosomes, tRNAs and all the factors required for protein synthesis. Assuming no initiation codon is required for protein synthesis, which of the following peptides will most likely be synthesised?
  A)
  A single peptide composed of the same amino acid sequence.
  done clear
  B)
  A single peptide with alternating sequence of two amino acids.
  done clear
  C)
  A single peptide with alternating sequence of three amino acids.
  done clear
  D)
  Three different peptides, each sequence composed of a single amino acid.
  done clear
  View Answer play_arrow

• question_answer114)
  The coding ratio in all known organisms is three, i.e., three nucleotides specify one amino acid. If DNA were to exclusively consist of only A-T base pairs, what would the minimum coding ratio be assuming that there are only 20 amino acids to be encoded?
  A)
  Two     
  done clear
  B)
  Three
  done clear
  C)
  Four     
  done clear
  D)
  Five
  done clear
  View Answer play_arrow

• question_answer115)

  A researcher was investigating the substrate specificity of two different enzymes, X and Y, on the same substrate. Both the enzymes were subjected to treatment with either heat or an inhibitor which inhibits the enzyme activity. Following are the results obtained where

  a=inhibitor treatment, b=heat treatment and c=control.

  Which of the following statements is correct?

  A)
  Only protein X is specific for the substrate, S.
  done clear
  B)
  Only protein Y is specific for the substrate, S.
  done clear
  C)
  Both X and Y are specific for the substrate, S.
  done clear
  D)
  Both X and Y are non-specific for the substrate, S.
  done clear
  View Answer play_arrow

• question_answer116)
  In rabbits, two genes A and B are present on two different chromosomes. Products of both wild type A and B genes are essential for normal hearing. Homozygous recessive mutants either for A, B or both results in deafness. If a double heterozygous male (AaBb) is crossed with a double heterozygous female, the ratio of phenotypically normal and deaf rabbits will be:
  A)
  \[15:1\]
  done clear
  B)
  \[7:9\]
  done clear
  C)
  \[9:7\]   
  done clear
  D)
  \[13:3\]
  done clear
  View Answer play_arrow

• question_answer117)

  The \[{{C}_{4}}\] carbon cycle is a \[C{{O}_{2}}\] concentrating mechanism evolved to reduce photorespiration. The followings are stated as important features of the \[{{C}_{4}}\] pathway:

  (i) The leaves of \[{{C}_{4}}\] plants have Kranz anatomy that distinguishes mesophyll and bundle sheath cells.

  (ii) In the peripheral mesophyll cells, atmospheric \[{{\operatorname{CO}}_{2}}\] is fixed by phosphoenol pyruvate carboxylase yielding a four-carbon acid.

  (iii) In the inner layer of mesophyll, NAD-malic enzyme decarboxylates four-carbon acid and releases\[{{\operatorname{CO}}_{2}}\].

  (iv) \[{{\operatorname{CO}}_{2}}\] is again re-fixed through Calvin cycle in the bundle sheath cells.

  Which one of the following combinations is correct?

  A)
  (ii), (iii) and (iv)
  done clear
  B)
  (i), (ii) and (iii)
  done clear
  C)
  (i), (ii) and (iv)
  done clear
  D)
  (i), (iii) and (iv)
  done clear
  View Answer play_arrow

• question_answer118)

  Choose the correct statement from the codes given below.

  (i)  Separation from extracellular medium allows the cells to maintain its chemical pool, orderliness of structure and reactions in contrast to disorderly distribution and randomly interacting molecules in the extracellular medium.

  (ii) Cells are unable to recognise one another due to the presence of specific chemicals on their surface.

  (iii) Cells of plant tissue are often connected with one another through cytoplasmic bridges called plasmodesmata.

  (iv) Different cells of an organism communicate as well as exchange materials with one another.

  A)
  (ii) and (iii)
  done clear
  B)
  (iii) and (iv)
  done clear
  C)
  (i), (iii) and (iv)
  done clear
  D)
  (i), (ii), (iii) and (iv)
  done clear
  View Answer play_arrow

• question_answer119)

  A sample of enzyme lactase was isolated from the intestinal lining of a calf. Assays were undertaken to evaluate the activity of enzyme sample. The substrate of lactase is the disaccharide lactose. Lactase breaks a lactose molecule in two, producing a glucose molecule and a galactose molecule.

  The results of two assays are:

  Assay 1

  Lactose Concentration (\[%\]w/v) 15 15 15 15 15 15 Concentration of enzyme sample  (\[%\]v/v) 0 5 10 15 20 25 Rate of reaction (\[\mu \] mole glucose \[{{\sec }^{-1}}\]\[{{\operatorname{ml}}^{-1}}\]) 0 25 50 75 100 125 Assay 2

  lactone concentration (\[%\]w/v) 0 5 15 20 25 30 Concentration of enzyme sample (\[%\]v/v) 5 5 5 5 5 5 Rate of reaction (\[\mu \]mole glucose \[{{\sec }^{-1}}\]\[{{\operatorname{ml}}^{-1}}\]) 0 15 25 35 40 40 Which of the following statements can be concluded from two assays?

  A)
  The reaction rate of lactase assay is always proportional to the amount of enzyme present.
  done clear
  B)
  The amount of lactose in an assay has no effect on the rate of reaction.
  done clear
  C)
  The reaction rate of the lactase assay is proportional to the amount of lactose present.
  done clear
  D)
  The reaction rate is proportional to the amount of enzyme present at a lactose concentration of \[15%\]w/v.
  done clear
  View Answer play_arrow

• question_answer120)

  Gives structural formula is correctly identified along with its related function by which of the following options?

  A)
  Cholesterol - A component of animal cell membrane
  done clear
  B)
  Lecithin - A component of cell membrane 
  done clear
  C)
  Triglyceride - An energy source
  done clear
  D)
  Adenosine - A component of nucleic acids
  done clear
  View Answer play_arrow