# Solved papers for NEET AIPMT SOLVED PAPER SCREENING 2004

### done AIPMT SOLVED PAPER SCREENING 2004 Total Questions - 200

• question_answer1) If ${{\lambda }_{m}}$denotes the wavelength at which the radiative emission from a black body at a temperature T K is maximum, then:

A)
${{\lambda }_{m}}\,\propto \,\,{{T}^{4}}$

B)
${{\lambda }_{m}}$is independent of T

C)
${{\lambda }_{m}}\propto \,\,T$

D)
${{\lambda }_{m}}\propto \,\,{{T}^{-1}}$

• question_answer2) The ratio of the radii of gyration of a circular disc about a tangential axis in the plane of the disc and of a circular ring of the same radius about a tangential axis in the plane of the ring is:

A)
2 : 3

B)
2 : 1

C)
$\sqrt{5}:\sqrt{6}$

D)
1 : $\sqrt{2}$

• question_answer3) A round disc of moment of inertia ${{I}_{2}}$about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia ${{I}_{1}}$rotating with an angular velocity $\omega$ about the same axis. The final angular velocity of the combination of discs is:

A)
$\frac{{{I}_{2}}\omega }{{{I}_{1}}+{{I}_{2}}}$

B)
$\omega$

C)
$\frac{{{I}_{1}}\omega }{{{I}_{1}}+{{I}_{2}}}$

D)
$\frac{({{I}_{1}}+{{I}_{2}})\,\omega }{{{I}_{1}}}$

• question_answer4)                A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet tall building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in the ratio of:

A)
$\sqrt{2}:1$

B)
1 : 4

C)
1 : 2

D)
$1:\sqrt{2}$

• question_answer5) An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is along the direction of the field, the force on it and its potential energy are respectively:

A)
2qE and minimum

B)
qE and pE

C)
zero and minimum

D)
qE and maximum

• question_answer6) A coil of 40 H inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 V battery. The time constant of the circuit is:

A)
5 s

B)
1/5 s

C)
40 s

D)
20 s

• question_answer7) One mole of an ideal gas at an initial temperature of T K does 6R joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is 5/3, the final temperature of gas will be:

A)
(T + 2.4) K

B)
(T - 2.4) K

C)
(T + 4) K

D)
(T - 4) K

• question_answer8) A battery is charged at a potential of 15 V for 8 H when the current flowing is 10 A. The battery on discharge supplies a current of 5 A for 15 H. The mean terminal voltage during discharge is 14 V. The ?watt-hour? efficiency of the battery is:

A)
82.5%

B)
80%

C)
90%

D)
87.5%

• question_answer9) The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, then:

A)
the resistance will be doubled and the specific resistance will be halved

B)
the resistance will be halved and the specific resistance will remain unchanged

C)
the resistance will be halved and the specific resistance will be doubled

D)
the resistance and the specific resistance, will both remain unchanged

• question_answer10) A galvanometer acting as a voltmeter will have:

A)
a high resistance in parallel with its coil

B)
a high resistance in series with its coil

C)
a low resistance in parallel with its coil

D)
a low resistance in series with its coil

• question_answer11) When three identical bulbs of 60 W, 200 V rating are connected in series to a 200 V supply, the power drawn by them will be:

A)
60 W

B)
180 W

C)
10 W

D)
20 W

• question_answer12) Resistances n, each, of r ohm, when connected in parallel give an equivalent resistance of R ohm. If these resistances were connected in series, the combination would have a resistance in ohms, equal to:

A)
${{n}^{2}}R$.

B)
$R/{{n}^{2}}$

C)
R/n

D)
nR

• question_answer13) The unit of permittivity of free space, ${{\varepsilon }_{0}}$,is:

A)
coulomb/newton-metre

B)
newton - metre2/coulomb2

C)
coulomb / newton ? metre

D)
coulomb2/ (newton- metre)2

• question_answer14) Five equal resistances each of resistance R are connected as shown in the figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be:

A)
$\frac{3V}{R}$

B)
$\frac{V}{R}$

C)
$\frac{V}{2R}$

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

• question_answer15) A galvanometer of $50\,\Omega$ resistance has 25 divisions. A current of $4\times {{10}^{-4}}\,A$ gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 V, it should be connected with a resistance of:

A)
$2500\,\Omega$ as a shunt

B)
$245\,\,\Omega$  as shunt

C)
$2550\,\,\Omega$  in series

D)
$2450\,\,\Omega$ in series

• question_answer16) A 6 V battery is connected to the terminals of a three metre long wire of uniform thickness and resistance of $100\,\,\Omega$. The difference of potential between two points on the wire separated by a distance or 50 cm will be:

A)
2 V

B)
3 V

C)
1 V

D)
1.5 V

• question_answer17) According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is:

A)

B)

C)

D)

• question_answer18) A nucleus represented by the symbol $_{Z}^{A}X$has:

A)
Z neutrons and A -Z protons

B)
Z protons and A-Z neutrons

C)
Z protons and A neutrons

D)
A protons and Z-A neutrons

• question_answer19) The dimensions of universal gravitational constant are:

A)
$[{{M}^{-1}}\,{{L}^{3}}\,{{T}^{-2}}]$

B)
$[M{{L}^{2}}\,{{T}^{-1}}]$

C)
$[{{M}^{-2}}\,{{L}^{3}}\,{{T}^{-2}}]$

D)
$[{{M}^{-2}}\,{{L}^{2}}\,{{T}^{-1}}]$

• question_answer20) If in a nuclear fusion process, the masses of the fusing nuclei be ${{m}_{1}}$ and ${{m}_{2}}$ and the mass of the resultant nucleus be ${{m}_{3}},$ then:

A)
${{m}_{3}}={{m}_{1}}+{{m}_{2}}$

B)
${{m}_{3}}=|{{m}_{1}}-{{m}_{2}}|$

C)
${{m}_{3}}<({{m}_{1}}+{{m}_{2}})$

D)
${{m}_{3}}>({{m}_{1}}+{{m}_{2}})$

• question_answer21) In semiconductors at a room temperature:

A)
the valence band is partially empty and the conduction band is partially filled

B)
the valence band is completely filled and the conduction band is partially filled

C)
the valence band is completely filled

D)
the conduction band is completely empty

• question_answer22) The peak voltage in the output of a half-wave diode rectifier fed with a sinusoidal signal without filter is 10V. The DC component of the output voltage is:

A)
$10/\sqrt{2}\,\text{V}$

B)
$10/\pi \,\,\text{V}$

C)
$-10\,\,\text{V}$

D)
$20/\pi \,\,\text{V}$

• question_answer23) A mass of 0.5 kg moving with a speed of 1.5 m/son a horizontal smooth surface, collides with a nearly weightless spring of force constant$\text{k}=\text{5}0\text{ N}/\text{m}.$The maximum compression of the spring would be:

A)
0.15m

B)
0.12m

C)
1.5m

D)
0.5m

• question_answer24) The output of OR gate is 1:

A)
only if both inputs are zero

B)
if either or both inputs are 1

C)
only if both inputs are 1

D)
if either input is zero

• question_answer25) In a p-n junction photo cell, the value of the photo-electromotive force produced by monochromatic light is proportional to:

A)
the barrier voltage at the p-n junction

B)
the intensity of the light falling on the cell

C)
the frequency of the light falling on the cell

D)
the voltage applied at the p-n junction

• question_answer26) The Bohr model of atoms:

A)
assumes that the angular momentum of electrons is quantized

B)
uses Einstein's photoelectric equation

C)
predicts continuous emission spectra for atoms

D)
predicts the same emission spectra for all types of atoms

• question_answer27) The coefficient of static friction, ${{\mu }_{s}}$between block A of mass 2 kg and the table as shown in the figure, is 0.2. What would be the maximum mass value of block B so that the two blocks do not move? The string and the pulley are assumed to be smooth and mass less: $\left( \text{g}=\text{1}0\text{ m}/{{\text{s}}^{\text{2}}} \right)$

A)
2.0kg

B)
4.0kg

C)
0.2kg

D)
0.4kg

• question_answer28) Which one of the following statements is true for the speed v and the acceleration a of a particle executing simple harmonic motion?

A)
When v is maximum, a is maximum

B)
Value of a is zero, whatever may be the value of v

C)
When v is zero, a is zero

D)
When v is maximum, a is zero

• question_answer29) Two springs of spring constants ${{k}_{1}}$and ${{k}_{2}}$ are joined in series. The effective spring constant of the combination is given by :

A)
$\sqrt{{{k}_{1}}{{k}_{2}}}$

B)
$({{k}_{1}}+{{k}_{2}})/2$

C)
${{k}_{1}}+{{k}_{2}}$

D)
${{k}_{1}}{{k}_{2}}/({{k}_{1}}+{{k}_{2}})$

• question_answer30) Of the diodes shown in the following diagrams, which one is reverse biased?

A)

B)

C)

D)

• question_answer31) A wheel having moment of inertia $\text{2 kg}-{{\text{m}}^{\text{2}}}$about its vertical axis, rotates at the rate of 60rpm about this axis. The torque which can stop the wheel's rotation in one minute would be:

A)
$\frac{2\pi }{15}\text{N-m}$

B)
$\frac{\pi }{12}\text{N-m}$

C)
$\frac{\pi }{15}\text{N-m}$

D)
$\frac{\pi }{18}\text{N-m}$

• question_answer32) Consider a system of two particles having masses ${{m}_{1}}$ and${{m}_{2}}$. If the particle of mass ${{m}_{1}}$ is pushed towards the mass centre of particles through a distance d, by what distance would the particle of mass ${{m}_{2}}$ move so as to keep the mass centre of particles at the original position?

A)
$\frac{{{m}_{1}}}{{{m}_{1}}+{{m}_{2}}}d$

B)
$\frac{{{m}_{1}}}{{{m}_{2}}}d$

C)
$d$

D)
$\frac{{{m}_{2}}}{{{m}_{1}}}d$

• question_answer33) If$|\overset{\to }{\mathop{A}}\,\,\,\,\times \overset{\to }{\mathop{B}}\,|\,=\sqrt{3}\overset{\to }{\mathop{A\,}}\,.\overset{\to }{\mathop{B\,}}\,$, then the value of$\left| \text{A}+\text{B} \right|$is :

A)
${{({{A}^{2}}+{{B}^{2}}+AB)}^{1/2}}$

B)
${{\left( {{A}^{2}}+{{B}^{2}}+\frac{AB}{\sqrt{3}} \right)}^{1/2}}$

C)
$A+B$

D)
${{({{A}^{2}}+{{B}^{2}}+\sqrt{3}AB)}^{1/2}}$

• question_answer34) A car is moving towards a high cliff. The car driver sounds a horn of frequency $f$. The reflected sound heard by the driver has a frequency $2f$. If$v$ be the velocity of sound, then the velocity of the car, in the same velocity units, will be:

A)
$\frac{v}{\sqrt{2}}$

B)
$\frac{v}{3}$

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

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

• question_answer35) A beam of light composed of red and green rays is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge from:

A)
two points propagating in two different on-parallel directions

B)
two points propagating in two different parallel directions

C)
one point propagating in two different directions

D)
one point propagating in the same direction

• question_answer36) The density of newly discovered planet is twice that of earth. The acceleration due to gravity at the surface of the planet is equal to that at the surface of the earth. If the radius of the earth is$R$, the radius of the planet would be:

A)
$2R$

B)
$4R$

C)
$\frac{1}{4}R$

D)
$\frac{1}{2}R$

• question_answer37) The refractive index of the material of a prism is $\sqrt{2}$ and its refracting angle is ${{30}^{\text{o}}}$. One of the refracting surfaces of the prism is made a mirror inwards. A beam of monochromatic light entering the prism from the other face will retrace its path after reflection from the mirrored surface if its angle of incidence on the prism is:

A)
${{45}^{\text{o}}}$

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

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

D)
${{30}^{\text{o}}}$

• question_answer38) A stone is tied to a string of length $l$and is whirled in a vertical circle with the other end of the string as the centre. At a certain instant of time, the stone is at its lowest position and has a speed $u$. The magnitude of the change in velocity as it reaches a position where the string is horizontal {g being acceleration due to gravity) is:

A)
$\sqrt{2({{u}^{2}}-gl)}$

B)
$\sqrt{{{u}^{2}}-gl}$

C)
$u-\sqrt{{{u}^{2}}-2gl}$

D)
$\sqrt{2gl}$

• question_answer39) A particle of mass ${{m}_{1}}$ is moving with a velocity${{v}_{1}}$and another particle of mass ${{m}_{2}}$is moving with a velocity ${{v}_{2}}$Both of them have the same momentum but their different kinetic energies are ${{E}_{1}}$ and ${{E}_{2}}$ respectively. If ${{m}_{1}}>{{m}_{2}}$then:

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

B)
$\frac{{{E}_{1}}}{{{E}_{2}}}=\frac{{{m}_{1}}}{{{m}_{2}}}$

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

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

• question_answer40) A bullet of mass 2g is having a charge of 2$\mu C$.Through what potential difference must it be accelerated, starting from rest, to acquire a speed of 10 m/s?

A)
5 kV

B)
50 kV

C)
5 V

D)
50 V

• question_answer41) In India electricity is supplied for domestic use at 220 V. It is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in India is R, the resistance of a 60 W bulb for use in USA will be:

A)
$R$

B)
$2R$

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

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

• question_answer42) The magnetic flux through a circuit of resistance $R$ changes by an amount $\Delta \phi$in a time$\Delta t$. Then the total quantity of electric charge Q that passes any point in the circuit during the time $\Delta t$is represented by :

A)
$Q=\frac{1}{R},\frac{\Delta \phi }{\Delta t}$

B)
$Q=\frac{\Delta \phi }{R}$

C)
$Q=\frac{\Delta \phi }{\Delta t}$

D)
$Q=R\,\,.\frac{\Delta \phi }{\Delta t}$

• question_answer43) The equation of state for 5g of oxygen at a pressure P and temperature T, when occupying a volume V, will be:

A)
$PV=(3/32)RT$

B)
$PV=5RT$

C)
$PV=(5/2)RT$

D)
$PV=(5/16)RT$

• question_answer44) The half-life of radium is about 1600 years. Of 100 g of radium existing now, 25 g will remain unchanged after:

A)
4800 year

B)
6400 year

C)
2400 year

D)
3200 year

• question_answer45) ${{M}_{p}}$denotes the mass of a proton and ${{M}_{n}}$that of a neutron. A given nucleus, of binding energy B, contains Z protons and N neutrons.                                                                                                                    The mass M(N, Z) of the nucleus is given by :

A)
$\text{M}\left( \text{N},\text{ Z} \right)=\text{N}{{\text{M}}_{\text{n}}}+\text{Z}{{\text{M}}_{\text{p}}}-\text{B}{{\text{e}}^{\text{2}}}$

B)
$\text{M}\left( \text{N},\text{Z} \right)=\text{N}{{\text{M}}_{\text{n}}}+\text{Z}{{\text{M}}_{\text{p}}}+\text{B/}{{\text{c}}^{\text{2}}}$

C)
$\text{M}\left( \text{N},\text{ Z} \right)=\text{N}{{\text{M}}_{\text{n}}}+\text{Z}{{\text{M}}_{\text{p}}}-\text{B}/{{\text{c}}^{\text{2}}}$

D)
$\text{M}\left( \text{N},\text{ Z} \right)=\text{N}{{\text{M}}_{\text{n}}}+\text{Z}{{\text{M}}_{\text{p}}}+\text{B}/{{\text{c}}^{\text{2}}}$

• question_answer46) The phase difference between two waves, represented by                                                                ${{y}_{1}}={{10}^{-6}}\sin [100t+(x/50)+0.5]\,m$ ${{y}_{2}}={{10}^{-6}}\cos [100t+(x/50)]\,m$ where x is expressed in metres and t is expressed in seconds, is approximately:

A)

B)

C)

D)

• question_answer47) A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometre from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light is $5000\overset{\text{o}}{\mathop{\text{A}}}\,,$, of the order of:

A)
0.5m

B)
5m

C)
5 mm

D)
5 cm

• question_answer48) A block of mass m is placed on a smooth wedge of inclination $\theta$. The whole system is accelerated horizontally so that the block does not slip on the wedge. The force exerted by the wedge on the block (g is acceleration due to gravity) will be:

A)
$mg\,\cos \theta$

B)
$mg\sin \theta$

C)
$mg$

D)
$mg/\cos \theta$

• question_answer49) Three particles, each of mass m grams situated at the vertices of an equilateral triangle ABC of side I cm (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram-$\text{c}{{\text{m}}^{\text{2}}}$ units will be:

A)
$(3/4)m{{l}^{2}}$

B)
$2\,m{{l}^{2}}$

C)
$(5/4)\,\,m{{l}^{2}}$

D)
$(3/2)\,\,m{{l}^{2}}$

• question_answer50) Energy E of a hydrogen atom with principal quantum number n is given by $E=\frac{-13.6}{{{n}^{2}}}eV.$The energy of a photon ejected when the electron jumps from $n=3$state to $n=2$ state of hydrogen, is approximately:

A)
1.5eV

B)
0.85 eV

C)
3.4 eV

D)
1.9 eV

• question_answer51) Among the following, the pair in which the two species are not isostructural, is:

A)
$Si{{F}_{4}}$and$S{{F}_{4}}$

B)
$IO_{3}^{-}$and$Xe{{O}_{3}}$

C)
$\text{B}{{\text{H}}_{\text{4}}}$and$\text{NH}_{4}^{+}$

D)
$\text{PF}_{6}^{-}$and$\text{SF}_{6}^{{}}$

• question_answer52) The rate of first order reaction is $\text{1}.\text{5}\times \text{1}{{0}^{-\text{2}}}$$\text{mol}{{\text{L}}^{-1}}$$\text{mi}{{\text{n}}^{-\text{1}}}$ at 0.5 M concentration of the reactant. The half-life of the reaction is:

A)
0.383mm

B)
23.1mm

C)
8.73mm

D)
7.53mm

• question_answer53) Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

A)
Polyhalogens

B)
Ferrocenes

C)
Fullerenes

D)
Freons

• question_answer54) Which one of the following structures represents the peptide chain?

A)
$-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\mathop{N}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-NH-\overset{\begin{smallmatrix} \\ || \end{smallmatrix}}{\mathop{C}}\,-NH-$

B)
$-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,$

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

D)
$-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{\begin{smallmatrix} \\ || \end{smallmatrix}}{\mathop{C}}\,-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\mathop{N}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-$

• question_answer55)                Which one of the following can be oxidised to the corresponding carbonyl compound?

A)
2-hydroxy-propane

B)
ortho-nitro ?phenol

C)
Phenol

D)
2-methyl-2-hydroxy-propane

• question_answer56) The$-OH$group of an alcohol or the $-COOH$group of a carboxylic acid can be replaced by$-Cl$using:

A)
phosphorus pentachloride

B)
hypochlorous acid

C)
chlorine

D)
hydrochloric acid

• question_answer57) Reaction of HBr with propene in the presence of peroxide gives:

A)
isopropyl bromide

B)
3-bromo propane

C)
allyl bromide

D)
n-propyl bromide

• question_answer58) Which is the best description of behaviour of bromine in the reaction given below? ${{H}_{2}}O+B{{r}_{2}}\xrightarrow[{}]{{}}HBr+HOBr$

A)
Proton accepted only

B)
Both oxidised and reduced

C)
Oxidised only

D)
Reduced only

• question_answer59) In a regular octahedral molecule, $M{{X}_{6}}$the number of $X-M-X$bonds at 180° is:

A)
three

B)
two

C)
six

D)
four

• question_answer60) Chloropicrin is obtained by be reaction of:

A)
steam on carbon tetrachloride

B)
nitric acid on chlorobenzene

C)
chlorine on picric acid

D)
nitric acid on chloroform

• question_answer61) Aniline when diazotised in cold and then treated with dimethyl aniline gives a coloured product. Its structure would be :

A)

B)

C)
Aniline on diazotisation in cold (at 0° to 5°C) give benzene diazonium chloride. This benzene diazonium chloride on coupling reaction with dimethyl aniline gives a coloured product i.e., p-(N, N-dimethyl) aminoazobenzene (azodye).

D)

• question_answer62) The standard emf of a galvanic cell involving cell reaction with $n=2$is found to be 0.295 Vat 25° C. The equilibrium constant of the reaction would be :

A)
$2.0\times {{10}^{11}}$

B)
$\text{4}.0\times \text{l}{{0}^{\text{12}}}$

C)
$\text{1}.0\times \text{l}{{0}^{\text{2}}}$

D)
$\text{1}.0\times \text{l}{{0}^{\text{1}0}}$ (Given: $F=96500\,\,C\,mo{{l}^{-1}};$ $R=8.314\,J{{K}^{-1}}mo{{l}^{-1}})$

• question_answer63) The solubility product of a sparingly soluble salt$\text{A}{{\text{X}}_{\text{2}}}$is $\text{3}\text{.2}\times \text{1}{{\text{0}}^{-11}}.$Its solubility (in mol/L) is:

A)
$\text{5}.\text{6}\times \text{l}{{0}^{-\text{6}}}$

B)
$\text{3}.\text{1}\times \text{l}{{0}^{-\text{4}}}$

C)
$\text{2}\times \text{l}{{0}^{-\text{4}}}$

D)
$\text{4}\times \text{l}{{0}^{-\text{4}}}$

• question_answer64) Among K, Ca, Fe and Zn, the element which can form more than one binary compound with chlorine is:

A)
Fe

B)
Zn

C)
K

D)
Ca

• question_answer65) Which one of the following statements about the zeolites is false?

A)
They are used as cation exchangers

B)
They have open structure which enables them to take up small molecules

C)
Zeolites are aluminosilicates having three dimensional network

D)
Some of the $SiO_{4}^{-4}$ units are replaced by$AlO_{4}^{5-}$and $AlO_{6}^{9-}$ ions in zeolites

• question_answer66) Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?

A)
$\text{C}{{\text{H}}_{\text{3}}}\text{CH}\left( \text{OH} \right)\text{C}{{\text{H}}_{\text{3}}}$

B)
$\text{C}{{\text{H}}_{\text{3}}}\text{C}{{\text{H}}_{\text{2}}}\text{CH}\left( \text{OH} \right)\text{C}{{\text{H}}_{\text{3}}}$

C)
$\text{C}{{\text{H}}_{\text{3}}}\text{OH}$

D)
$\text{C}{{\text{H}}_{\text{3}}}\text{C}{{\text{H}}_{\text{2}}}\text{OH}$

• question_answer67) A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid?

A)
Three

B)
Four

C)
One

D)
Two

• question_answer68) Which of the following is considered to be ananticancer species?

A)

B)

C)

D)

• question_answer69) The hormone that helps in the conversion of glucose to glycogen is:

A)
cortisone

B)
bile acids

C)

D)
insulin

• question_answer70) If the bond energies of $\text{H}\text{H},$$\text{Br}\text{Br}$ and$\text{H}\text{Br}$ are 433, 192 and 364 kJ $mo{{l}^{-1}}$respectively, then $\Delta {{H}^{0}}$for the reaction${{H}_{2}}(g)+B{{r}_{2}}(g)\xrightarrow[{}]{{}}2HBr(g)$is:

A)
$-\text{261 kJ}$

B)
$+\text{1}0\text{3 kJ}$

C)
$+\text{261 kJ}$

D)
$-\text{1}0\text{3 kJ}$

• question_answer71) A compound formed by elements X and Y crystallizes in a cubic structure in which the X atoms are at the comers of a cube and the Y atoms are at the face-centres. The formula of the compound is:

A)
$X{{Y}_{3}}$

B)
${{X}_{3}}Y$

C)
XY

D)
$X{{Y}_{2}}$

• question_answer72) Standard enthalpy and standard entropy changes for the oxidation of ammonia at 298 K are$-382.64\,KJ\,mo{{l}^{-1}}$ and$-145.6\,J{{K}^{-1}}\,mo{{l}^{-1}},$respectively. Standard Gibbs energy change for the same reaction at 298 K is:

A)
$-\text{2221}.\text{1kJmo}{{\text{l}}^{-\text{1}}}$

B)
$-339.3\,kJ\,mo{{l}^{-1}}$

C)
$-\text{ 439}.\text{3 kJ mo}{{\text{l}}^{-1}}$

D)
$-\text{523}.\text{2kJmo}{{\text{l}}^{-1}}$

• question_answer73) The maximum number of molecules is present in:

A)
$15L\,$of${{H}_{2}}$gas at STP

B)
$5\,\,\,L$of${{\text{N}}_{\text{2}}}$ gas at STP

C)
$\text{0}\text{.5}$g of ${{\text{H}}_{2}}$gas

D)
$10g\,$of${{O}_{2}}$

• question_answer74) The radioactive isotope$_{27}^{60}Co$ which is used in the treatment of cancer can be made by (n, p)reaction. For this reaction the target nucleus is:

A)
$_{28}^{59}\text{Ni}$

B)
$_{27}^{59}\text{Co}$

C)
$_{28}^{60}\text{Ni}$

D)
$_{27}^{60}\text{Co}$

• question_answer75) The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called:

A)
maltase

B)
lipase

C)
zymase

D)
pepsin

• question_answer76) Which of the following co-ordination compounds would exhibit optical isomerism?

A)
Pentaamminenitrocobalt$\text{(III)}$ iodide

B)
Diamminedinitroplatinum$\text{(II)}$

C)
traos-dicyanobis (ethylenediamine)

D)
Tris-(ethylendiamine) cobalt $\text{(III)}$ bromide

• question_answer77) Among ${{[Ni{{(CO)}_{4}}]}^{2-}},{{[Ni{{(CN)}_{4}}]}^{2-}},$${{[NiC{{l}_{4}}]}^{2-}}$species, the hybridisation states of the Ni atom are, respectively : (At. no. of Ni = 28)

A)
$s{{p}^{3}},ds{{p}^{2}}\,\,ds{{p}^{2}}$

B)
$s{{p}^{3}},ds{{p}^{2}}\,\,s{{p}^{3}}$

C)
$s{{p}^{3}},s{{p}^{3}}\,\,ds{{p}^{2}}$

D)
$ds{{p}^{2}},s{{p}^{3}}\,\,sp$

• question_answer78) Among the following series of transition metal ions, the one in which all metal ions have $3{{d}^{2}}$electronic configuration is: (At. no. :$Ti=22;$$V=23;$$Cr=24;Mn=25$)

A)
$T{{i}^{3+}},{{V}^{2+}},C{{r}^{3+}},\,\,M{{n}^{4+}}$

B)
$T{{i}^{+}},{{V}^{4+}},C{{r}^{6}},\,\,M{{n}^{7+}}$

C)
$T{{i}^{4+}},{{V}^{3+}},C{{r}^{2+}},\,\,M{{n}^{3+}}$

D)
$T{{i}^{2+}},{{V}^{3+}},C{{r}^{4+}},\,\,M{{n}^{5+}}$

• question_answer79) The rapid change of pH near the stoichiometric point of an acid base titration is the basis of indicator detection. pH of the solution is related to ratio of the concentrations of the conjugate acid $(HIn)$and base $(I{{n}^{-}})$forms of the indicator given by the expression:

A)
$\log \frac{[I{{n}^{-1}}]}{[\text{HIn}]}=p{{k}_{\ln }}-pH$

B)
$\log \frac{[\text{Hn}]}{[I{{n}^{-}}]}=p{{k}_{In}}-pH$

C)
$\log \frac{[HIn]}{[I{{n}^{-}}]}=pH-p{{K}_{\ln }}$

D)
$\log \frac{[I{{n}^{-}}]}{[HIn]}=pH-p{{K}_{In}}$

• question_answer80) $C{{N}^{-}}$is strong field ligand. This is due to the fact that:

A)
it carries negative charge

B)
it is a pseudo halide

C)
it can accept electrons from metal species

D)
it forms high spin complexes with metal species

• question_answer81) Considering ${{H}_{2}}O$as weak field ligand, the number of unpaired electrons in${{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}}$will be (At. no. of $Mn=25$):

A)
three

B)
five

C)
two

D)
four

• question_answer82) Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is :

A)
$\Delta \,{{S}_{system}}+\Delta {{S}_{surroundings}}>0$

B)
$\Delta \,{{S}_{system}}-\Delta {{S}_{surroundings}}>0$

C)
$\Delta \,{{S}_{system}}>0$only

D)
$\Delta {{S}_{surroundings}}>0$only

• question_answer83) ${{H}_{2}}O$is dipolar, whereas $Be{{F}_{2}}$ is not. It is because:

A)
the electro negativity of F is greater than that of O

B)
${{H}_{2}}O$involves hydrogen bonding whereas$Be{{F}_{2}}$ is a discrete molecule

C)
${{H}_{2}}O$ is linear and $Be{{F}_{2}}$ is angular

D)
${{H}_{2}}O$is angular and $Be{{F}_{2}}$ is linear

A)
inversely proportional to effective nuclear charge

B)
inversely proportional to square of effective nuclear charge

C)
directly proportional to effective nuclear charge

D)
directly proportional to square of effective nuclear charge

• question_answer85) Which of the following does not have a         metal-carbon bond?

A)
$Al{{(O{{C}_{2}}{{H}_{5}})}_{3}}$

B)
${{C}_{2}}{{H}_{5}}MgBr$

C)
$K[Pt({{C}_{2}}{{H}_{4}})C{{l}_{3}}]$

D)
$Ni{{(CO)}_{4}}$

A)
14 elements in the sixth period (atomic no. = 90 to 103) that are filling 4f sub-level

B)
14 elements in the seventh period (atomic no. = 90 to 103) that are filling 5f sub-level

C)
14 elements in the sixth period (atomic no. = 58 to 71) that are filling 4f sub-level

D)
14 elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sub-level

• question_answer87) Which of the following forms cationic micelles above certain concentration?

A)
Sodium ethyl sulphate

B)
Sodium acetate

C)
Urea

D)
Cetyltrimethylammonium bromide

• question_answer88) Which one of the following is a chain growth polymer ?

A)
Starch

B)
Nucleic acid

C)
Polystyrene

D)
Protein

• question_answer89) The correct statement in respect of protein hemoglobin is that it:

A)
functions as a catalyst for biological reactions

B)
maintains blood sugar level

C)
act as an oxygen carrier in the blood

D)
forms antibodies and offers resistance to diseases

• question_answer90) The frequency of radiation emitted when the electron falls from $\text{n}=\text{4}$to $\text{n}=1$ in a hydrogen atom will be (Given ionisation energy of $H=2.18\,\,{{10}^{-18}}J\,ato{{m}^{-1}}$and $h=6.625\times {{10}^{-34}}Js):$

A)
$\text{1}.\text{54}\times \text{l}{{0}^{\text{15}}}\text{ }{{\text{s}}^{-\text{1}}}$

B)
$1.03\times {{10}^{15}}\,\,{{s}^{-1}}$

C)
$\text{3}.0\text{8}\times \text{1}{{0}^{\text{15}}}\text{ }{{\text{s}}^{-\text{1}}}$

D)
$\text{2}.00\times \text{1}{{0}^{\text{15}}}\text{ }{{\text{s}}^{-\text{1}}}$

• question_answer91) Camphor is often used in molecular mass determination because :

A)

B)
it has a very high cryoscopic constant

C)
it is volatile

D)
it is solvent for organic substances

• question_answer92) In an octahedral structure, the pair of dorbitals involved in ${{d}^{2}}s{{p}^{3}}$hybridisation is:

A)
${{d}_{{{x}^{2}}-{{y}^{2}}}}{{d}_{{{z}^{2}}}}$

B)
${{d}_{xz}},{{d}_{{{x}^{2}}-{{y}^{2}}}}$

C)
${{d}_{{{z}^{2}}'}}{{d}_{xz}}$

D)
${{d}_{xy}},{{d}_{yz}}$

• question_answer93) Number of chiral carbon  atoms   in $\beta -D+$glucose is:

A)
five

B)
six

C)
three

D)
four

• question_answer94) The helical structure of protein is stabilized by

A)
dipeptide bonds

B)
hydrogen bonds

C)
ether bonds

D)
peptide bonds

• question_answer95) Which of the following is least reactive in anucleophilic substitution reaction ?

A)
${{(C{{H}_{3}})}_{3}}C-Cl$

B)
$\text{C}{{\text{H}}_{\text{2}}}=\,\,\text{CHC1}$

C)
$\text{C}{{\text{H}}_{3}}\,\text{C}{{\text{H}}_{2}}\text{C1}$

D)
$\text{C}{{\text{H}}_{\text{2}}}=\text{CHC}{{\text{H}}_{\text{2}}}\text{C1}$

• question_answer96) The work done during the expansion of a gas from a volume of $4\,d{{m}^{3}}$to$6\,d{{m}^{3}}$against a constant external pressure of 3 atm, is:

A)
$-\,\,\text{6}\,\,\text{J}$

B)
$-\,\,\text{6}0\text{8}\,\,\text{J}$

C)
$+\text{ 3}0\text{4 J}$

D)
$-\text{ 3}0\text{4 J}$

• question_answer97) In $Br{{F}_{3}}$ molecule, the lone pairs occupy equatorial positions to minimize :

A)
lone pair-bond pair repulsion only

B)
bond pair-bond pair repulsion only

C)
lone pair-lone pair repulsion and lone pair-bond pair repulsion

D)
lone pair-lone pair repulsion only

• question_answer98) Using anhydrous $\text{AlC}{{\text{l}}_{3}}$ as catalyst, which one of the following reactions produce ethylbenzene (PhEt) ?

A)
${{\text{H}}_{\text{3}}}\text{C}\text{C}{{\text{H}}_{\text{2}}}\text{OH}+\text{ }{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{6}}}$

B)
$\text{C}{{\text{H}}_{\text{3}}}\text{CH}=\text{C}{{\text{H}}_{\text{2}}}+{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{6}}}$

C)
${{\text{H}}_{\text{2}}}\text{C}=\text{C}{{\text{H}}_{\text{2}}}\text{+}{{\text{C}}_{\text{6}}}{{\text{H}}_{6}}$

D)
${{\text{H}}_{\text{3}}}\text{C}-\text{C}{{\text{H}}_{\text{3}}}+{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{6}}}$

• question_answer99) The molecular formula of diphenyl methane How many structural isomers are possible when one of the hydrogen is replaced by a chlorine atom?

A)
6

B)
4

C)
8

D)
7

• question_answer100) A solid compound 'X' on heating gives $C{{O}_{2}}$gas and a residue. The residue mixed with water forms on passing an excess of $C{{O}_{2}}$through ?Y? in water, a clear solution, 'Z' is obtained. On boiling 'Z' compound 'X' is reformed. The compound 'X' is:

A)
$\text{Ca}{{\left( \text{HC}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}}$

B)
$\text{CaC}{{\text{O}}_{\text{3}}}$

C)
$\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}$

D)
${{\text{K}}_{2}}C{{O}_{3}}$

• question_answer101) One of the parents of a cross has mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of ${{F}_{2}}$progenies that mutation is found in:

A)
one-third of the progenies

B)
none of the progenies

C)
all of the progenies

D)
fifty per-cent of die progenies

• question_answer102) When a fresh water protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will:

A)
increase in number

B)
disappear

C)
increase in size

D)
decrease in size

• question_answer103) One of the following is a very unique feature of the mammalian body:

A)
homeothermy

B)
presence of diaphragm

C)
four chambered heart

D)
rib cage

A)
biogenic amines only

B)
proteins, steroids and biogenic amines

C)
proteins only

D)
steroids only

• question_answer105) When $\text{C}{{\text{O}}_{\text{2}}}$concentration in blood increases, breathing becomes:

A)
shallower and slow

B)
there is no effect on breathing

C)
slow and deep

D)
faster and deeper

• question_answer106) Which one of the following pairs is not correctly matched?

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

B)
Vitamin ${{B}_{6}}$ ? Loss of appetite

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

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

• question_answer107) Uricotelism is found in:

A)
mammals and birds

B)
fishes and fresh water protozoans

C)
birds, reptiles and insects

D)

• question_answer108) Duodenum has characteristic Brunner's glands which secrete two hormones called:

A)
kinase, estrogen

B)
secretin, cholecystokinin

C)
prolactin, parathormone

D)

• question_answer109) Mast cells of connective tissue contain:

A)
vasopressin and relaxin

B)
heparin and histamine

C)
heparin and calcitonin

D)
serotonin and melanin

• question_answer110) Cancer cells are more easily damaged by radiation than normal cells because they are:

A)
starved of mutation

B)
undergoing rapid division

C)
different in structure

D)
non-dividing

• question_answer111) Certain characteristic demographic features of developing countries are :

A)
high fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution

B)
high fertility, high density, rapidly rising mortality rate and a very young age distribution

C)
high infant mortality, low fertility, uneven population growth and a very young age distribution

D)
high mortality, high density, uneven population growth and a very old age distribution

• question_answer112) ATPase enzyme needed for muscle contraction is located in :

A)
actinin

B)
troponin

C)
myosin

D)
actin

• question_answer113) Which one of the following is not correctly matched?

A)
Glossinapalpalis ? Sleeping sickness

B)
Culexpipiens ? Filariasis

C)
Aedesaegypti ? Yellow fever

D)
Anopheles culifacies ? Leishmaniasis

• question_answer114) Which one of the following pairs is not correctly matched?

A)
Streptomyces ? Antibiotic

B)

C)
Spirulina ? Single cell protein

D)
Rhizobium ? Biofertilizer

• question_answer115) A major component of gobar gas is:

A)
ammonia

B)
methane

C)
ethane

D)
butane

• question_answer116) A free living nitrogen-fixing cyan bacterium which can also form symbiotic association with the water fern Azolla is:

A)
Tolypothrix

B)
Chlorella

C)
Nostoc

D)
Anabaena

• question_answer117) In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the individual would be :

A)
B

B)
O

C)
AB

D)
A

• question_answer118) Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency?

A)
Luteinizing hormone ? Failure of ovulation

B)
Insulin ? Diabetes insipidus

C)
Thyroxine ? Tetany

D)
Parathyroid hormone ? Diabetes mellitus

• question_answer119) Angiosperms have dominated the land flora primarily because of their :

A)
power of adaptability in diverse habitat

B)
property of producing large number of seeds

C)
nature of some pollination

D)
domestication by man

• question_answer120) In a mutational event, when adenine is replaced by guanine, it is the case of :

A)
frame shift mutation

B)
transcription

C)
transition

D)
transversion

• question_answer121) An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is :

A)
hemitropous

B)
campylotropous

C)
anatropous

D)
orthotropous

• question_answer122) Ovulation in the human female normally takes place during the menstrual cycle:

A)
at the mid secretory phase

B)
just before the end of the secretory phase

C)
at the beginning of the proliferative phase

D)
at the end of the proliferative phase

• question_answer123) Injury to vagus nerve in human is not likely to affect:

A)
tongue movements

B)
gastrointestinal movements

C)
pancreatic secretion

D)
cardiac movements

• question_answer124) Which of the following hormones is not a secretion product of human placenta?

A)

B)
Prolactin

C)
Estrogen

D)
Progesterone

• question_answer125) You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of them will you not use for the prupose?

A)
Test tube containing calcium bicarbonate

B)
Chilled test tube

C)
Test tube containing heparin

D)
Test tube containing sodium oxalate

• question_answer126) The cardiac pace maker in a patient fails to function normally. The doctors find that an artificial pace maker is to be grafted in him. It is likely that it will be grafted at the site of :

A)
atrioventricular bundle

B)
Purkinje system

C)
sinuatrial node

D)
atrioventricular node

• question_answer127) Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct? The patient has been inhailing polluted air containing usually high content of:

A)
carbon disulphide

B)
chloroform

C)
carbon dioxide

D)
carbon monoxide

• question_answer128) What is a keystone species?

A)
A species which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival

B)
A common species that has plenty of biomass, yet has a fairly low impact on the community's organization

C)
A rare species that has minimal impact on the biomass and on other species in the community

D)
A dominant species that constitutes a largproportion of the biomass and which affects many other species

• question_answer129) DNA finger printing refers to:

A)
molecular analysis of profiles of DNAs amples

B)
analysis of DMA samples using imprinting device

C)
techniques used for molecular analysis of different specimens of DNA

D)
techniques used for identification of fingerprints of individuals

• question_answer130) Flagella of prokaryotic and eukaryotic cells differ in :

A)
type of movement and placement in cell

B)
location in cell and mode of functioning

C)
micro-tubular organisation and type of movement

D)
micro-tubular organisation and function

• question_answer131) In which one of the following enzymes, copper is necessarily associated as an activator?

A)
Carbonic anhydrase

B)
Tryptophanase

C)
Lactic dehydrogenase

D)
Tyrosinase

• question_answer132) The animal with bilateral symmetry in young stage, and radial pentamerous symmetry in the adult stage belong to the phylum:

A)
Annelida

B)
Mollusca

C)
Cnidaria

D)
Echinodennata

• question_answer133) In Arthropoda, head and thorax are often fused to form cephalothorax, but in which one of the following classes, is the body divided into head, thorax and abdomen?

A)
Insects

B)
Myriapoda

C)
Crustacea

D)
Arachnida and Crustacea.

• question_answer134) Which one of the following is the correct matching of a vitamin, its nature and its deficiency disease?

A)
Vitamin A ? Fat soluble ? Nightblindness

B)
Vitamin K ? Fat soluble ? Beri-beri

C)
Vitamin A ? Fat soluble ?Beri-beri

D)
Vitamin K? Water soluble?Pellagra

• question_answer135) Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to:

A)
repulsion

B)
recombination

C)

D)
crossing over

• question_answer136) In your opinion, which is the most effective way to conserve the plant diversity of an area?

A)
By tissue culture method.

B)
By creating biosphere reserve

C)
By creating botanical garden

D)
By developing seed bank

• question_answer137) Which of the following is expected to have the highest value $(gm/{{m}^{2}}yr)$ in a grassland ecosystem ?

A)
Secondary production (SP)

B)
Tertiary production (TP)

C)
Gross production (GP)

D)
Net production (NP)

• question_answer138) In 1984, the Bhopal gas tragedy took place because methyl isocyanate:

A)
reacted with DDT

B)
reacted with ammonia

C)
reacted with $\text{C}{{\text{O}}_{\text{2}}}$

D)
reacted with water

• question_answer139) If by radiation all nitrogenase enzymes are inactivated, then there will be no :

A)
fixation of nitrogen in legumes

B)
fixation of atmospheric nitrogen

C)
conversion from nitrate to nitrite in legumes

D)
conversion from ammonium to nitrate in soil

• question_answer140) Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary period for different groups of organisms, includes :

A)
study of carbohydrates/proteins in fossils

B)
study of the conditions of fossilization

C)
electron spin resonance (ESR) and fossil DNA

D)
study of carbohydrates/proteins in rocks

• question_answer141) Lead concentration in blood is considered alarming if it is:

A)
$\text{20}\mu g/100\,\,ml$

B)
$30\mu g/100\,\,ml$

C)
$4-6\mu g/100\,\,ml$

D)
$10\mu g/100\,\,ml$

• question_answer142) What kind of evidence suggested that man is more closely related with chimpanzee than with other hominoid apes?

A)
Evidence from DNA from sex chromosomes only

B)
Comparison of chromosomes morphology only

C)
Evidence from fossil remains and the fossil mitochondrial DNA alone

D)
Evidence from DNA extracted from sex chromosome, autosomes and mitochondria

• question_answer143) Anthesis is a phenomenon which refers to:

A)
reception of pollen by stigma

B)
formation of pollen

C)
development of anther

D)
opening of flower bud

• question_answer144) One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light arid it did not produce flower. Under which one of the following categories will you place this plant?

A)
Long day

B)
Darkness neutral

C)
Day neutral

D)
Short day

• question_answer145) In which one of the following pairs is the specific characteristic of soil not correctly matched?

A)
Laterite ? Contains aluminium compound

B)
Terra rossa ? Most suitable for roses

C)
Chemozems ? Richest soil in the world

D)
Black soil ? Rich in calcium carbonate

• question_answer146) Recently Govt. of India has allowed mixing of alcohol in petrol. What is the amount of alcohol permitted for mixing in petrol?

A)
2.5%

B)
10-15%

C)
10%

D)
5%

• question_answer147) In a longitudinal section of a root, starting from the tip upward the four zones occur in the following order:

A)
root cap, cell division, cell enlargement, cell maturation

B)
root cap, cell division, cell maturation, cell enlargement

C)
cell division, cell enlargement, cell maturation, root cap

D)
cell division,  cell  maturation,   cell enlargement, root cap

• question_answer148) Presence of gills in the tadpole of frog indicates that:

A)
fishes were amphibious in the past

B)
fishes evolved from frog like ancestors

C)
frogs will have gills in future

D)
frogs evolved from gilled ancestors

• question_answer149) An ecosystem which can be easily damaged but can recover after some time if damaging effect stops, will be having:

A)
low stability and high resilience

B)
high stability and low resilience

C)
low stability and low resilience

D)
high stability and high resilience

• question_answer150) During transcription, the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide sequence in the    m-RNA would be :

A)
TATGC

B)
TCTGG

C)
UAUGC

D)
UATGG

• question_answer151) Extra nuclear inheritance is a consequence of presence of genes in :

A)
mitochondria ah-d-chloroplasts

B)
endoplasmic reticulum and mitochondria

C)
ribosomes and chloroplast

D)
lysosomes and ribosomes

• question_answer152) Which one of the following hormones is a modified amino acid?

A)
Epinephrine

B)
Progesterone

C)
Prostaglandin

D)
Estrogen

• question_answer153) Viruses that infect bacteria, multiply and cause their lysis, are called :

A)
lysozymes

B)
lipolytic

C)
lyric

D)
lysogenic

• question_answer154) The recessive genes located on X-chromosome in humans are always :

A)
lethal

B)
sub-lethal

C)
expressed in males

D)
expressed in females

• question_answer155) In ${{C}_{3}}$ plants, the first stable product of photosynthesis during the dark reaction is :

A)
malic acid

B)
oxaloacetic acid

C)
3-phoshoglyceric acid

D)
phosphoglyceraldehyde

• question_answer156) Crossing over that results in genetic recombination in higher organisms occurs between:

A)
sister chromatids of bivalent

B)
non-sister chromatids of a bivalent

C)
two daughter nuclei

D)
two different bivalents

• question_answer157) Which of the following statements is not true for retroviruses?

A)
DNA is not present at any stage in the lifecycle of retroviruses

B)
Retroviruses carry gene for RNA dependent DNA polymerase

C)
The genetic   material   in   mature retroviruses is RNA

D)
Retroviruses are causative agents for certain kinds of cancer in man

• question_answer158) Restriction end nucleases :

A)
are present in mammalian cells for degradation of DNA when the cell dies

B)
are used in genetic engineering for ligating two DNA molecules

C)
are used for in vitro DNA synthesis

D)
are synthesized by bacteria as part of their defence mechanism

• question_answer159) In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive:

A)
${{K}^{+}}$into the cell

B)
${{K}^{+}}$and $N{{a}^{+}}$out of the cell

C)
$N{{a}^{+}}$into the cell

D)
$N{{a}^{+}}$ out of the cell

• question_answer160) The maximum growth rate occurs in:

A)
stationary phase

B)
senescent phase

C)
lag phase

D)
exponential phase

• question_answer161) Diversification in plant life appeared:

A)
due to long periods of evolutionary changes

B)
due to abrupt mutations

C)
suddenly on earth

D)
by seed dispersal

• question_answer162) The technique of obtaining large number of plantlets by tissue culture method is called :

A)
plantlet culture

B)
organ culture

C)
micro-propagation

D)
macro-propagation

• question_answer163) Cell elongation in internodal regions of the green plants takes place due to :

A)
indole acetic acid

B)
cytokinins

C)
gibberellins

D)
ethylene

• question_answer164) The most abundant element present in the plants is:

A)
carbon

B)
nitrogen

C)
manganese

D)
iron

• question_answer165) Photosynthetically Active Radiation (PAR)represents the following range of wavelength :

A)
500-600 nm

B)
450-950 nm

C)
340-450 nm

D)
400-700 nm

• question_answer166) A terrestrial animal must be able to :

A)
excrete large amounts of water in urine

B)
conserve water

C)
actively pump salts out through the skin

D)
excrete large amounts of salts in urine

• question_answer167) A male human is heterozygous for autosomalgenes A and B and is also hemizygous for haemophilic gene h. what proportion of his sperms will be abh?

A)
$\frac{1}{8}$

B)
$\frac{1}{32}$

C)
$\frac{1}{16}$

D)
$\frac{1}{4}$

• question_answer168) Edible part of mango is:

A)
endocarp

B)
receptacle

C)
epicarp

D)
mesocarp

• question_answer169) In chloroplasts, chlorophyll is present in the:

A)
outer membrane

B)
inner membrane

C)
thylakoids

D)
stroma

• question_answer170) In glycolysis, during oxidation electrons are removed by:

A)
ATP

B)
glyceraldehyde-3-phosphate

C)
$\text{NA}{{\text{D}}^{+}}$

D)
molecular oxygen

• question_answer171) Dough kept over-night in warm weather becomes soft and spongy because of:

A)
absorption of carbon dioxide from atmosphere

B)
fermentation

C)
cohesion

D)
osmosis

• question_answer172) In the somatic cell cycle:

A)
in${{G}_{1}}$phase DNA content is double the amount of DNA present in the original cell

B)
DNA replication takes place in S-phase

C)
a short interphase is followed by a long mitotic phase

D)
${{G}_{2}}$phase follows mitotic phase

• question_answer173) A nutritonally wild type organism, which does not require any additional growth supplement is known as:

A)
phenotype

B)
holotype

C)
auxotroph

D)
prototroph

• question_answer174) Which of the following propagates through leaf-tip?

A)
Walking fern

B)
Sprout-leaf plant

C)
Marchantia

D)
Muss

• question_answer175) Common indicator organism of water pollution is:

A)
Lannapancicostata

B)
Eichhorniacrassipes

C)
Escherichia coli

D)
Entamoebahistolytica

• question_answer176) ELISA is used to detect viruses, where:

A)
DNA probes are required

B)
southern blotting is done

C)
alkaline phosphatase is the key reagent

D)
catalase is the key reagent

• question_answer177) Phenetic classification of organisms is based on:

A)
observable characteristics of existing organisms

B)
the ancestral lineage of existing organisms

C)
dendrogram based on DNA characteristics

D)
sexual characteristics

• question_answer178) If you are provided with root-tips of onion in your class and are asked to count the chromosomes, which of the following stages can you most conveniently look into?

A)
Metaphase

B)
Telophase

C)
Anaphase

D)
Prophase

• question_answer179) When a diploid female plant is crossed with atetraploid male, the ploidy of endosperm cellsin the resulting seed is:

A)
tetraploidy

B)
pentaploidy

C)
diploidy

D)
triploidy

• question_answer180) India's wheat yield revolution in the 1960s waspossible primarily due to:

A)
hybrid seeds

B)
increased chlorophyll content

C)
mutations resulting in plant height reduction

D)
quantitative trait mutations

• question_answer181) The most likely reason for the development of resistance against pesticides in insect damaginga crop is :

A)
random mutations

B)
genetic recombination

C)
directed mutations

D)
acquired heritable changes

• question_answer182) The following ratio is generally constant for a given species

A)
$\text{A}+\text{G}/\text{C}+\text{T}$

B)
$\text{T}+\text{C}/\text{G}+\text{A}$

C)
$\text{G}+\text{C}/\text{A}+\text{T}$

D)
$\text{A}+\text{C}/\text{T}+\text{G}$

• question_answer183) A self-fertilizing trihybrid plant forms :

A)
8 different gametes and 64 different zygotes

B)
4 different gametes and 16 different zygotes

C)
8 different gametes and 16 different zygotes

D)
8 different gametes and 32 different zygotes

• question_answer184) Lichens are well known combination of an alga and a fungus where fungus has:

A)
a saprophytic relationship with the alga

B)
an epiphytic relationship with the alga

C)
a parasitic relationship with the alga

D)
a symbiotic relationship with the alga

• question_answer185) In oogamy, fertilization involves:

A)
a small non-motile female gamete and a large motile male gamete

B)
a large non-motile female gamete and as mall motile male gamete

C)
a large non-motile female gamete and as mall non-motile male gamete

D)
a large motile female gamete and a small non-motile male gamete

• question_answer186) Which one of the following is a living fossil?

A)
Cycas

B)
Moss

C)
Saccharomyces

D)
Spirogyra

• question_answer187) In which one of the following habitats does the diurnal temperature of soil surface vary most?

A)
Shrub land

B)
Forest

C)
Desert

D)
Grassland

• question_answer188) Which form of RNA has a structure resembling clover leaf?

A)
$r$-RNA

B)
$hn$-RNA

C)
$m$-RNA

D)
$t$-RNA

• question_answer189) The telomeres of eukaryotic chromosomes consists of short sequences of :

A)
thymine rich repeats

B)
cytosine rich repeats

C)

D)
guanine rich repeats

• question_answer190) After a mutation at a genetic locus the character of an organism changes due to the change in

A)
protein structure

B)
DNA replication

C)
protein synthesis pattern

D)
RNA transcription pattern

• question_answer191) During replication of a bacterial chromosome DNA synthesis starts from a replication origin site and:

A)
RNA primers are involved

B)
is facilitated by telomerase

C)
moves in one direction of the site

D)
moves in bi-directional way

A)
larger photosynthetic unit size than the sun plants

B)
higher rate of $\text{C}{{\text{O}}_{\text{2}}}$fixation than the sun plants

C)
more extended root system

D)
leaves modified to spines

• question_answer193) The $\text{Ti}$plasmid, is often used for making transgenic plants. This plasmid is found in :

A)
Azotobacter

B)
Rhizobium of the roots of leguminous plants

C)
Agrobacterium

D)
Yeast as a 2 um plasmid

• question_answer194) In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt, :

A)
25% will be tall with red fruit

B)
50% will be tall with red fruit

C)
75% will be tall with red fruit

D)
all of the offspring will tall with red fruit

• question_answer195) According to Oparin, which one of the following was not present in the primitive atmosphere of the earth ?

A)
Methane

B)
Oxygen

C)
Hydrogen

D)
Water vapour

• question_answer196) Which 'one of the following precedesre-formation of the nuclear envelope during M phase of the cell cycle?

A)
Decondensation from chromosomes and reassembly of the nuclear lamina

B)
Transcription from chromosomes and reassembly of the nuclear lamina

C)
Formation of the contractile ring and formation of the phragmoplast

D)
Formation of the contractile ring and transcription from chromosomes

• question_answer197) The richest sources of vitamin-Big are:

A)
goat's liver and Spirulina

B)
chocolate and green gram

C)
rice and hen's egg

D)
carrot and chicken's breast

• question_answer198) The most thoroughly studied of the known bacteria-plant interactions is the:

A)
cyanobacterial symbiosis with some aquatic ferns

B)
gall formation on certain angiosperms by Agrobacterium

C)
nodulation of Sesbania stems by nitrogen fixing bacteria

D)
plant growth stimulation by phosphate solublising bacteria

• question_answer199) In transgenics, expression of transgene in target tissue is determined by:

A)
enhancer

B)
transgene

C)
promoter

D)
reporter

• question_answer200) A normal woman whose father was colourblind is married to a normal man. The sons would be:

A)
75% colourblind

B)
50% colourblind

C)
all normal

D)
all colourblind