# Solved papers for NEET AIPMT SOLVED PAPER SCREENING 2005

### done AIPMT SOLVED PAPER SCREENING 2005 Total Questions - 200

• question_answer1)                 A coil in the shape of an equilateral triangle of side (is suspended between the pole pieces of a permanent magnet such that $\vec{B}$ is in plane of the coil. If due to a current i in the triangle a torque t acts on it, the side 2 of the triangle is:

A)
$\frac{2}{\sqrt{3}}{{\left( \frac{\tau }{Bi} \right)}^{1/2}}$

B)
$\frac{2}{\sqrt{3}}\left( \frac{\tau }{Bi} \right)$

C)
$2{{\left( \frac{\tau }{\sqrt{3}\,Bi} \right)}^{1/2}}$

D)
$\frac{1}{\sqrt{3}}\,\frac{\tau }{Bi}$

• question_answer2)                 Two batteries, one of emf 18 V and internal resistance $2\,\,\Omega$ and the other of emf 12 V and internal resistance $1\,\,\Omega$, are connected as shown. The voltmeter V will record a reading of:

A)
15 V

B)
30 V

C)
14 V

D)
18 V

• question_answer3)                 A point source emits sound equally in all directions in a non-absorbing medium. Two points P and Q are at distance of 2m and 3m respectively from the source. The ratio of the intensities of the waves at P and Q is:

A)
9 : 4

B)
2 : 3

C)
3 : 2

D)
4 : 9

• question_answer4)                                   A bomb of mass 30 kg at rest explodes into two pieces of masses 18 kg and 12 kg. The velocity of 18 kg mass is $6\,m{{s}^{-1}}$. The kinetic energy of the other mass is:

A)
256 J

B)
486 J

C)
524 J

D)
324 J

• question_answer5)                                   A drum of radius R and mass M, rolls down without slipping along an inclined plane of angle $\theta$. The frictional force:

A)
converts translational energy to rotational energy

B)
dissipates energy as heat

C)
decreases the rotational motion

D)
decreases the rotational and translational motion

• question_answer6)                 Imagine a new planet having the same density as that of earth but it is 3 times bigger than the earth in size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet is g', then:

A)
$g'=3\,g$

B)
$g'=\frac{g}{9}$

C)
$g'=9\,g$

D)
$g'=27\,g$

• question_answer7)                 A network of four capacitors of capacity equal to ${{C}_{1}}=C,\,\,{{C}_{2}}=2C,\,\,{{C}_{3}}=3C$ and ${{C}_{4}}=4C$ are connected to a battery as shown in the figure The ratio of the charges on ${{C}_{2}}$ an ${{C}_{4}}$ is:

A)
$\frac{22}{3}$

B)
$\frac{3}{22}$

C)
$\frac{7}{4}$

D)
$\frac{4}{7}$

• question_answer8)                 Which of the following circular rods, (given radius $r$ and length $l$) each made of the same material and whose ends are maintained at the same temperature will conduct most heat ?

A)
$r=2{{r}_{0}};\,l=2{{l}_{0}}$

B)
$r=2{{r}_{0}};\,l={{l}_{0}}$

C)
$r={{r}_{0}};\,l={{l}_{0}}$

D)
$r={{r}_{0}};\,l=2{{l}_{0}}$

• question_answer9)                 In the reaction $_{1}^{2}H+\,_{1}^{3}H\,\to \,_{2}^{4}He+\,_{0}^{1}n$, if the binding energies of $_{1}^{2}H\,,\,_{2}^{3}H$ and $_{2}^{4}He$ are respectively a, b and c (in MeV), then the energy (in MeV) released in-this reaction is:

A)
$c+a-b$

B)
$c-a-b$

C)
$a+b+c$

D)
$a+b-c$

• question_answer10)                 A very long straight wire carries a current I. At the instant when a charge + Q at point P has velocity $\vec{v}$, as shown, the force on the charge is:

A)
opposite to ox

B)
along ox

C)
opposite to oy

D)
along oy

• question_answer11)                 Energy levels A, B and C of a certain atom correspond to increasing values of energy i.e., ${{E}_{A}}<{{E}_{B}}<{{E}_{C}}$. If ${{\lambda }_{1}},\,{{\lambda }_{2}}$ and ${{\lambda }_{3}}$ are wavelengths of radiations corresponding to transitions C to B, B to A and C to A respectively, which of the following relations is correct?

A)
${{\lambda }_{3}}={{\lambda }_{1}}+{{\lambda }_{2}}$

B)
${{\lambda }_{3}}=\frac{{{\lambda }_{1}}{{\lambda }_{2}}}{{{\lambda }_{1}}+{{\lambda }_{2}}}$

C)
${{\lambda }_{1}}+{{\lambda }_{2}}+{{\lambda }_{3}}=0$

D)
$\lambda _{3}^{2}=\lambda _{1}^{2}+\lambda _{2}^{2}$

• question_answer12)                 The work functions for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein's equation, the metals which will emit photoelectrons for a radiation of wavelength $4100\overset{\text{o}}{\mathop{\text{A}}}\,$ is/are:

A)
none

B)
A only

C)
A and B only

D)
all the three metals

• question_answer13)                 The nuclei of which one of the following pairs of nuclei are isotones?

A)
$_{34}S{{e}^{74}},{{\,}_{31}}G{{a}^{71}}$

B)
$_{42}M{{o}^{92}}\,,{{\,}_{40}}Z{{r}^{92}}$

C)
$_{38}S{{r}^{84}},{{\,}_{38}}S{{r}^{86}}$

D)
$_{20}C{{a}^{40}},\,{{\,}_{16}}{{S}^{32}}$

• question_answer14)                 As per this diagram a point charge +q is placed at the origin O. Work done in taking another point charge-Q from the point A [co-ordinates (0,a)] to another points [co-ordinates (a, 0)] along the straight path AB is :

A)
zero

B)
$\left( \frac{-qQ}{4\pi {{\varepsilon }_{0}}}\frac{1}{{{a}^{2}}} \right)\sqrt{2}a$

C)
$\left( \frac{qQ}{4\pi {{\varepsilon }_{0}}}\frac{1}{{{a}^{2}}} \right)\cdot \frac{a}{\sqrt{2}}$

D)
$\left( \frac{qQ}{4\pi {{\varepsilon }_{0}}}\frac{1}{{{a}^{2}}} \right)\sqrt{2}a$

• question_answer15)                 As a result of change in the magnetic flux linked to the closed loop shown in the figure, an emf V volt is induced in the loop. The work done (joules) in taking a charge Q coulomb once along the loop is:

A)
QV

B)
zero

C)
2 QV

D)
QV/2

• question_answer16)                 For the network shown in the figure, the value of the current i is:

A)
$\frac{9V}{35}$

B)
$\frac{5V}{18}$

C)
$\frac{5V}{9}$

D)
$\frac{18V}{5}$

• question_answer17)                 The circular motion of a particle with constant speed is:

A)
simple harmonic but not periodic

B)
periodic and simple harmonic

C)
neither periodic nor simple harmonic

D)
periodic but not simple harmonic

• question_answer18)                 Particle executing simple harmonic motion of amplitude 5 cm has maximum speed of 31.4 cm/s. The frequency of its oscillation is:

A)
3 Hz

B)
2 Hz

C)
4 Hz

D)
1 Hz

• question_answer19)                 The ratio of the dimensions of Planck's constant and that of the moment of inertia is the dimension of:

A)
frequency

B)
velocity

C)
angular momentum

D)
rime

• question_answer20)                 Which of the following processes is reversible?

A)
Transfer of heat by radiation

B)
Electrical heating of a nichrome wire

C)
Transfer of heat by conduction

D)
Isothermal compression

• question_answer21)                 The temperature of inversion of a thermocouple is ${{620}^{\text{o}}}C$ and the neutral temperature is ${{300}^{\text{o}}}C$. What is the temperature of cold junction?

A)
${{20}^{\text{o}}}C$

B)
${{320}^{\text{o}}}C$

C)
$-{{20}^{\text{o}}}C$

D)
${{40}^{\text{o}}}C$

• question_answer22)                 A photosensitive metallic surface has work function, $h\,{{v}_{0}}$. If photons of energy $2h{{v}_{0}}$ fall on this surface, the electrons come out with a maximum velocity of $4\times {{10}^{6}}\,m/s$. When the photon energy is increased to $5\,h{{v}_{0}}$, then maximum velocity of photoelectrons will be:

A)
$2\times {{10}^{6}}\,m/s$

B)
$2\times {{10}^{7}}\,m/s$

C)
$8\times {{10}^{5}}\,m/s$

D)
$8\times {{10}^{6}}\,m/s$

• question_answer23)                 Fission of nuclei is possible because the binding energy per nucleon in them:

A)
increases with mass number at high mass numbers

B)
decreases with mass number at high mass numbers

C)
increases with mass number at low mass numbers

D)
decreases with mass number at low mass numbers

• question_answer24)                 Application of a forward bias to a p-n junction:

A)
increases the number of donors on the n-side

B)
increases the electric field in the depletion zone

C)
increases the potential difference across the depletion zone

D)
widens the depletion zone

• question_answer25)                 The displacement $x$ of a particle varies with time $t$ as $x=a{{e}^{-at}}+b{{e}^{\beta t}}$, where $a,\,b,\,\,\alpha$ and $\beta$ are positive constants. The velocity of the particle will:

A)
go on decreasing with time

B)
be independent of $\alpha$ and $\beta$

C)
drop to zero when $\alpha =\beta$

D)
go on increasing with time

• question_answer26)                 Two charges q1 and q2 are placed 30 cm apart as shown in the figure. A third charge q3 is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy of the system is $\frac{{{q}_{3}}}{4\pi {{\varepsilon }_{0}}}$ k, where k is:

A)
$8{{q}_{2}}$

B)
$8{{q}_{1}}$

C)
$6{{q}_{2}}$

D)
$6{{q}_{1}}$

• question_answer27)                 In any fission process the ratio $\frac{mass\,of\,fission\,products}{mass\,of\,parent\,nucleus}\,is\,:$

A)
less than 1

B)
greater than 1

C)
equal to 1

D)
depends on the mass of parent nucleus

• question_answer28)                 An ideal gas heat engine operates in Carnot cycle between ${{227}^{\text{o}}}C$ and ${{127}^{\text{o}}}C$. It absorbs $6\times {{10}^{4}}$ cal of heat at higher temperature. Amount of heat converted to work is:

A)
$2.4\times {{10}^{4}}\,cal$

B)
$6\times {{10}^{4}}\,cal$

C)
$1.2\times {{10}^{4}}\,cal$

D)
$4.8\times {{10}^{4}}\,cal$

• question_answer29)                 If a vector $2\hat{i}+3\hat{j}+8\hat{k}$ is perpendicular to the vector $4\hat{j}-4\hat{i}+\alpha \hat{k},$ then the value of a is:

A)
-1

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

C)
$-\frac{1}{2}$

D)
1

• question_answer30)                 Zener diode is used for:

A)
producing oscillations in an oscillator

B)
amplification

C)
stabilization

D)
rectification

• question_answer31)                 A force F acting on an object varies with distance $x$ as shown here. The force is in N and $x$ is in m. The work done by the force in moving the object from x = 0 to x = 6 m is:

A)
4.5 J

B)
13.5 J

C)
9.0 J

D)
18.0 J

• question_answer32)                 A stone tied to the end of a string of 1 m long is whirled in a horizontal circle with a constant speed. If the stone makes 22 revolutions in 44 s, what is the magnitude and direction of acceleration of the stone?

A)
$\frac{\pi }{2}$ $m{{s}^{-2}}$and direction along the radius towards the centre

B)
${{\pi }^{2}}\,m{{s}^{-2}}$and direction along the radius away from centre

C)
${{\pi }^{2}}\,m{{s}^{-2}}$ and direction along the radius towards the centre

D)
${{\pi }^{2}}\,m{{s}^{-2}}$ and direction along the tangent to the circle

• question_answer33)                 If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by ${{\mu }_{d}},{{\mu }_{p}}$ and ${{\mu }_{f}}$respectively, then:

A)
${{\mu }_{d}}\ne 0\,\,and\,\,{{\mu }_{f}}\ne 0$

B)
${{\mu }_{p}}=0\,and\,{{\mu }_{f}}\ne 0$

C)
${{\mu }_{d}}=0\,\,and\,\,{{\mu }_{p}}\ne 0$

D)
${{\mu }_{d}}\ne 0\,and\,{{\mu }_{p}}=0$

• question_answer34)                 In a circuit, L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by . The value of C is:

A)
$\frac{1}{2\pi f\,(2\pi fL+R)}$

B)
$\frac{1}{\pi f\,(2\pi fL+R)}$

C)
$\frac{1}{2\pi f\,(2\pi fL-R)}$

D)
$\frac{1}{\pi f\,(2\pi fL-R)}$

• question_answer35)                 The angular resolution of a 10 cm diameter telescope at a wavelength of $5000\overset{\text{o}}{\mathop{\text{A}}}\,$ is of the -order of:

A)
${{10}^{6}}rad$

B)
${{10}^{-2}}rad$

C)
${{10}^{-4}}\,rad$

D)
${{10}^{-6}}rad$

• question_answer36)                 Two vibrating tuning forks produce progressive waves given by ${{y}_{1}}=4\sin 500\,\pi t$ and ${{y}_{2}}=2\sin \,506\,\pi t$. Number of beats produced per minute is:

A)
360

B)
180

C)
3

D)
60

• question_answer37)                 When a wire of uniform cross-section a, length $l$ and resistance R is bent into a complete circle, resistance between two of diametrically opposite points will be:

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

B)
$\frac{R}{8}$

C)
4 R

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

• question_answer38)                 Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by ${{({{E}_{g}})}_{C}},$ ${{({{E}_{g}})}_{Si}}$  and $({{E}_{g}}){{G}_{Ge}}$ respectively. Which one of the following relationships is true in their case?

A)
${{({{E}_{g}})}_{C}}>{{({{E}_{g}})}_{Si}}$

B)
${{({{E}_{g}})}_{C}}={{({{E}_{g}})}_{Si}}$

C)
${{({{E}_{g}})}_{C}}<({{E}_{g}})Ge$

D)
${{({{E}_{g}})}_{C}}<{{({{E}_{g}})}_{Si}}$

• question_answer39)                 If ${{\lambda }_{v}},\,{{\lambda }_{x}}\,$and ${{\lambda }_{m}}$represent the wavelengths of visible light, X-rays and microwaves respectively, then:

A)
${{\lambda }_{m}}>{{\lambda }_{x}}>{{\lambda }_{v}}$

B)
${{\lambda }_{v}}>{{\lambda }_{m}}>{{\lambda }_{x}}$

C)
${{\lambda }_{m}}>{{\lambda }_{v}}>{{\lambda }_{x}}$

D)
${{\lambda }_{v}}>{{\lambda }_{x}}>{{\lambda }_{m}}$

• question_answer40)                 Two boys are standing at the ends A and B of a ground, where AB = a. The boy at B starts running in a direction perpendicular to AB with velocity ${{v}_{1}}$. The boy at A starts running simultaneously with velocity v and catches the other boy in a time t, where t is:

A)
$\frac{a}{\sqrt{{{v}^{2}}+v_{1}^{2}}}$

B)
$\sqrt{\frac{{{a}^{2}}}{{{v}^{2}}-v_{1}^{2}}}$

C)
$\frac{a}{(v-{{v}_{1}})}$

D)
$\frac{a}{(v+{{v}_{1}})}$

• question_answer41)                 A 5-A fuse wire can withstand a maximum power of 1 W in circuit. The resistance of the fuse wire is:

A)
0.2 $\Omega$

B)
5 $\Omega$

C)
0.4 $\Omega$

D)
0.04 $\Omega$

• question_answer42)                 Two bodies have their moments of inertia $l$ and $2\,l$ respectively about their axis of rotation. If their kinetic energies of rotation are equal, their angular momenta will be in the ratio:

A)
1 : 2

B)
$\sqrt{2}\,:1$

C)
2 : 1

D)
$1:\sqrt{2}$

• question_answer43)                 An electron moves in a circular orbit with a uniform speed v. It produces a magnetic field B, at the centre of the circle. The radius of the circle is proportional to:

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

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

C)
$\sqrt{\frac{v}{B}}$

D)
$\sqrt{\frac{B}{v}}$

• question_answer44)                 Choose the only false statement from the following:

A)
Substances with energy gap of the order of 10 eV are insulators

B)
The conductivity of a semiconductor increases with increases in temperature

C)
In conductors the valence and conduction bands may overlap

D)
The resistivity of a semiconductor increases with increase in temperature

• question_answer45)                 If the angle between the vectors $\vec{A}$ and $\vec{B}$ is $\theta$, the value of the product $(\vec{B}\times \vec{A}).\vec{A}$ is equal to:

A)
$B{{A}^{2}}\cos \theta$

B)
$B{{A}^{2}}\sin \theta$

C)
$B{{A}^{2}}\sin \theta \cos \theta$

D)
zero

• question_answer46)                 The moment of inertia of a uniform circular disc of radius R and mass M about an axis passing from the edge of the disc and normal to the disc is:

A)
$\frac{1}{2}\,M{{R}^{2}}$

B)
$M{{R}^{2}}$

C)
$\frac{7}{2}M{{R}^{2}}$

D)
$\frac{3}{2}M{{R}^{2}}$

• question_answer47)                 Copper has face-centered cubic (fcc) lattice with interatomic spacing equal to $2.54\,\overset{\text{o}}{\mathop{\text{A}}}\,$. The value of lattice constant for this lattice is:

A)
$1.27\,\overset{\text{o}}{\mathop{\text{A}}}\,$

B)
$5.08\,\overset{\text{o}}{\mathop{\text{A}}}\,$

C)
$2.54\,\overset{\text{o}}{\mathop{\text{A}}}\,$

D)
$3.59\,\overset{\text{o}}{\mathop{\text{A}}}\,$

• question_answer48)                 The total energy of an electron in the first excited state of hydrogen is about -3.4 eV. Its kinetic energy in this state is:

A)
-3.4eV

B)
-6.8eV

C)
6.8 eV

D)
3.4 Ev

• question_answer49)                 For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is:

A)
2

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

C)
$\frac{1}{\sqrt{2}}$

D)
$\sqrt{2}$

• question_answer50)                 A ball is thrown vertically upward. It has a speed of 10 m/s when it has reached one half of its maximum height. How high does the ball rise? (Taking $g=10\,m/{{s}^{2}}$)

A)
15 m

B)
10 m

C)
20 m

D)
5 m

• question_answer51)                 Which amongst the following is the most stable carbocation?

A)
\begin{align} & C{{H}_{3}}-\underset{|}{\mathop{\overset{+}{\mathop{C}}\,}}\,-H \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}} \\ \end{align}

B)
\begin{align} & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}} \\ & C{{H}_{3}}-\underset{|}{\mathop{\overset{|}{\mathop{{{C}^{+}}}}\,}}\, \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}} \\ \end{align}

C)
$\overset{+}{\mathop{C}}\,{{H}_{3}}$

D)
$C{{H}_{3}}\overset{+}{\mathop{C}}\,{{H}_{2}}$

• question_answer52)                 Products of the following reaction:  $C{{H}_{3}}C\equiv C.C{{H}_{2}}C{{H}_{3}}\underset{(2)\,Hydrolysis}{\mathop{\xrightarrow{(1)\,{{O}_{3}}}}}\,\,......are\,:$

A)
$C{{H}_{3}}CHO+C{{H}_{3}}C{{H}_{2}}CHO$

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

C)
$C{{H}_{3}}COOH+HOOC.C{{H}_{2}}C{{H}_{3}}$

D)
$C{{H}_{3}}COOH+C{{O}_{2}}$

• question_answer53)                 At ${{25}^{\text{o}}}C,$ the dissociation constant of a base, BOH, is $1.0\times {{10}^{-12}}$. The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be:

A)
$2.0\times {{10}^{-6}}\,mol\,{{L}^{-1}}$

B)
$1.0\times {{10}^{-5}}\,mol\,{{L}^{-1}}$

C)
$1.0\times {{10}^{-6}}\,mol\,{{L}^{-1}}$

D)
$1.0\times {{10}^{-7}}\,mol\,{{L}^{-1}}$

• question_answer54)                 Which one of the following pairs represents stereoisomerism?

A)
Chain isomerism and rotational isomerism

B)
Structural isomerism and geometric isomerism

C)
Linkage isomerism and geometric isomerism

D)
Optical isomerism and geomertric isomerism

• question_answer55)                 Aniline in a set of reactions yielded a product D.                                                                                                                                       The structure of die product D would be:

A)
${{C}_{6}}{{H}_{5}}C{{H}_{2}}>{{H}_{2}}$

B)
${{C}_{6}}{{H}_{5}}NHC{{H}_{2}}C{{H}_{3}}$

C)
${{C}_{6}}{{H}_{5}}NHOH$

D)
${{C}_{6}}{{H}_{5}}C{{H}_{2}}OH$

• question_answer56)                   The correct order in which the O?O bond length increases in the following is:

A)
${{H}_{2}}{{O}_{2}}<{{O}_{2}}<{{O}_{3}}$

B)
${{O}_{3}}<{{H}_{2}}{{O}_{2}}<{{O}_{2}}$

C)
${{O}_{2}}<{{O}_{3}}<{{H}_{2}}{{O}_{2}}$

D)
${{O}_{2}}<{{H}_{2}}{{O}_{2}}<{{O}_{3}}$

• question_answer57)                 The mass of carbon anode consumed (giving only carbondioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is:                                                             (Atomic mass Al = 27)

A)
180 kg

B)
270 kg

C)
540 kg

D)
90 kg

• question_answer58)                 In a set of reactions, acetic acid yielded a product D.                                                                        $C{{H}_{3}}COOH\xrightarrow[{}]{SOC{{l}_{2}}}A\underset{Anhyd.\,AlC{{l}_{3}}}{\mathop{\xrightarrow{Benzene}}}\,B\xrightarrow[{}]{HCN}C\xrightarrow[{}]{HOH}D$                 The structure of D would be:

A)

B)

C)

D)

• question_answer59)                 The cell membranes are mainly composed of:

A)
carbohydrates

B)
proteins

C)
phospholipids

D)
fats

• question_answer60)                 The major organic product formed from the following reaction:

A)

B)

C)

D)

• question_answer61)                 The number of moles of $KMn{{O}_{4}}$ reduced by one mole of KI in alkaline medium is:

A)
one fifth

B)
five

C)
one

D)
two

• question_answer62)                 Which of the following molecules has trigonal planar geometry?

A)
$I{{F}_{3}}$

B)
$PC{{l}_{3}}$

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

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

• question_answer63)                 The aqueous solution containing which one of the following ions will be colourless?                        (Atomic no. : Sc = 21, Fe = 26, Ti = 22, Mn = 25)

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

B)
$F{{e}^{2+}}$

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

D)
$M{{n}^{2+}}$

• question_answer64)                 Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy?

A)
Vanadium (Z = 23)

B)
Chromium (Z = 24)

C)
Iron (2 = 26)

D)
Manganese (Z = 25)

• question_answer65)                 Which one of the following compounds is most acidic?

A)
$Cl-C{{H}_{2}}-C{{H}_{2}}-OH$

B)

C)

D)

• question_answer66)                 A reaction occurs spontaneously if:

A)
$T\Delta S<\Delta H$and both $\Delta H$ and $\Delta S$ are +ve

B)
$T\Delta S>\Delta H$ and both $\Delta H$ and $\Delta S$ are +ve

C)
$T\Delta S=\Delta H$and both $\Delta H$ and $\Delta S$ are +ve

D)
$T\Delta S>\Delta H$ and $\Delta H$ is + ve and $\Delta S$ is ?ve

• question_answer67)                 The monomer of the polymer:

A)

B)
${{(C{{H}_{3}})}_{2}}C=C{{(C{{H}_{3}})}_{2}}$

C)
$C{{H}_{3}}CH=CH.C{{H}_{3}}$

D)
$C{{H}_{3}}CH=C{{H}_{2}}$

• question_answer68)                 The correct sequence of increasing covalent character is represented by:

A)
$LiCl<NaCl<BeC{{l}_{2}}$

B)
$BeC{{l}_{2}}<NaCl<LiCl$

C)
$NaCl<LiCl<BeC{{l}_{2}}$

D)
$BeC{{l}_{2}}<LiCl<NaCl$

• question_answer69)                 What is the correct relationship between the pHs of isomolar solutions of sodium oxide $(p{{H}_{1}})$, sodium sulphide $(p{{H}_{2}})$ sodium selenide $(p{{H}_{3}})$ and sodium telluride $(p{{H}_{4}})$?

A)
$p{{H}_{1}}>p{{H}_{2}}\approx p{{H}_{3}}>p{{H}_{4}}$

B)
$p{{H}_{1}}<p{{H}_{2}}<p{{H}_{3}}<p{{H}_{4}}$

C)
$p{{H}_{1}}<p{{H}_{2}}<p{{H}_{3}}\approx p{{H}_{4}}$

D)
$p{{H}_{1}}>p{{H}_{2}}>p{{H}_{3}}>p{{H}_{4}}$

• question_answer70)                 Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction?

A)
Exothermic and decreasing disorder

B)
Endothermic and increasing disorder

C)
Exothermic and increasing disorder

D)
Endothermic and decreasing disorder

• question_answer71)                 The vapour pressure of two liquids P and Q are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be:

A)
140 torr

B)
20 torr

C)
68 torr

D)
72 torr

• question_answer72)                 Which one of the following alkenes will react faster with H2 under catalytic hydrogenation conditions?

A)

B)

C)

D)

• question_answer73)                 For a first order reaction $A\xrightarrow[{}]{{}}B\,$, the reaction rate at reactant concentration of 0.01 M is found to be $2.0\times {{10}^{-5}}\,mol\,{{L}^{-1}}\,{{s}^{-1}}$. The half life period of the reaction is:

A)
220 s

B)
30 s

C)
300 s

D)
347 s

• question_answer74)                 Which of the following is the electron deficient molecule?

A)
${{B}_{2}}{{H}_{6}}$

B)
${{C}_{2}}{{H}_{6}}$

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

D)
$Si{{H}_{4}}$

• question_answer75)                 A nuclide of an alkaline earth metal undergoes radioactive decay by emission of three $\alpha$-particles in succession. The group of the periodic table to which the resulting daughter element would belong is:

A)
Group 14

B)
Group 16

C)
Group 4

D)
Group 6

• question_answer76)                 The surface tension of which of the following liquid is maximum?

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

B)
${{C}_{6}}{{H}_{6}}$

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

D)
${{C}_{2}}{{H}_{5}}OH$

• question_answer77)                 The absolute enthalpy of neutralisation of the reaction: MgO(s) + 2HCI (aq) $\to$$MgC{{l}_{2}}(ag)+{{H}_{2}}O(l)$ will be:

A)
less than $-57.33\,kJ\,mo{{l}^{-1}}$

B)
$-57.33\,kJ\,mo{{l}^{-1}}$

C)
greater than $-57.33\,kJ\,mo{{l}^{-1}}$

D)
$-57.33\,kJ\,mo{{l}^{-1}}$

• question_answer78)                 Which one of the following forms micelles in aqueous solution above certain concentration?

A)
Urea

B)
Dodecyl trimethyl ammonium chloride

C)
Pyridinium chloride

D)
Glucose

• question_answer79)                 Electrolytic reduction of nitrobenzene in weakly acidic medium gives:

A)
aniline

B)
nitrosobenzene

C)
N-phenylhydroxylamine

D)
p-hydroxyaniline

• question_answer80)                 Equilibrium constants ${{K}_{1}}$ and ${{K}_{2}}$ for the following equilibria:                 ${{N}_{2}}(g)+\frac{1}{2}{{O}_{2}}\,N{{O}_{2}}(g)\,and\,$          $2N{{O}_{2}}(g)\,2NO(g)+{{O}_{2}}(g)$                 are related as:

A)
${{K}_{2}}=\frac{1}{{{K}_{1}}}$

B)
${{K}_{2}}=K_{1}^{2}$

C)
${{K}_{2}}=\frac{{{K}_{1}}}{2}$

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

• question_answer81)                 Which of the following would have a permanent dipole moment?

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

B)
$Si{{F}_{4}}$

C)
$S{{F}_{4}}$

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

• question_answer82)                 Which of the following undergoes nucleophilic substitution exclusively by ${{S}_{N}}1$ mechanism?

A)
Benzyl chloride

B)
Ethyl chloride

C)
Chlorobenzene

D)
Isopropyl chloride

• question_answer83)                 The rate of reaction between two reactants A and B decreases by a factor of 4, if die concentration of reactant B is doubled. The order of this reaction with respect to reactant B is:

A)
-1

B)
-2

C)
1

D)
2

• question_answer84)                 In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?

A)
8

B)
4

C)
2

D)
6

• question_answer85)                 A solution of urea (mol. mass $56\,g\,mo{{l}^{-1}}$) boils at 100.18°C at the atmospheric pressure. If ${{k}_{f}}$ and ${{k}_{b}}$ for water are 1.86 and $0.512K\,kg\,mo{{l}^{-1}}$ respectively, die above solution will freeze at:

A)
-6.54°C

B)
6.54°C

C)
0.654°C

D)
- 0.654°C

• question_answer86)                 Which functional group -participates in disulphide bond formation in proteins?

A)
Thiolactone

B)
Thiol

C)
Thioether

D)
Thioester

• question_answer87)                 Which one of the following is an inner orbital complex as well as diamagnetic in behaviour?                                                                                                                 (Atomic no. : Zn = 30, Cr = 24, Co = 27, Ni = 28)

A)
${{[Zn\,{{(N{{H}_{3}})}_{6}}]}^{2+}}$

B)
${{[Cr{{(N{{H}_{3}})}_{6}}]}^{3+}}$

C)
${{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}$

D)
${{[Ni\,{{(N{{H}_{3}})}_{6}}]}^{2+}}$

• question_answer88)                 The chirality of the compound                                                                                                                                                   is:

A)
R

B)
S

C)
Z

D)
E

• question_answer89)                 ${{H}_{2}}S$ gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because:

A)
presence of HCl decreases the sulphide ion concentration

B)
presence of HCl increases the sulphide ion concentration

C)
solubility product of group II sulphides is more than that of group IV sulphides

D)
sulphides of group IV cations are unstable in HCl

• question_answer90)                 Which one of the following oxides is expected to exhibit paramagnetic behaviour?

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

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

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

D)
$Si{{O}_{2}}$

• question_answer91)                 Which one of the following is expected to exhibit optical isomerism? (en = ethylenediamine)

A)
$cis-[Pt{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]$

B)
$trans-[Co{{(en)}_{2}}C{{l}_{2}}]$

C)
trans-$[Pt{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]$

D)
$cis-[Co{{(en)}_{2}}C{{l}_{2}}]$

• question_answer92)                 The energy of second Bohr orbit of the hydrogen atom is $-328\,\,mJ\,mo{{l}^{-1}};$ hence the energy of fourth Bohr orbit would be:

A)
$-41\,\,kJ\,mo{{l}^{-1}}$

B)
$-1312\,kJ\,mo{{l}^{-1}}$

C)
$-164\,kJ\,mo{{l}^{-1}}$

D)
$-82\,kJ\,mo{{l}^{-1}}$

• question_answer93)                 The correct order of acid strength is:

A)
$HClO<HCl{{O}_{2}}<HCl{{O}_{3}}<HCl{{O}_{4}}$

B)
$HCl{{O}_{4}}<HClO<HCl{{O}_{2}}<HCl{{O}_{3}}$

C)
$HCl{{O}_{2}}<HCl{{O}_{3}}<HCl{{O}_{4}}<HClO$

D)
$HCl{{O}_{4}}<HCl{{O}_{3}}<HCl{{O}_{2}}<HClO$

• question_answer94)                 The main reason for larger number of oxidation states exhibited by the actinides than the corresponding lanthanides, is:

A)
lesser energy difference between $5f$ and 6d orbitals than between $4f$ and 5d orbitals

B)
larger atomic size of actinides than the lanthanides

C)
more energy difference between 5f and 6d orbitals than between 4f and 5d orbitals

D)
greater reactive nature of the actinides than the lanthanides

• question_answer95)                 Names of some compounds are given. Which one is not correct in IUPAC system?

A)
$\underset{\text{3-methyl-2 butanol}}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}}}\,$

B)
$\underset{\text{4-methyl-2-pentyne}}{\mathop{C{{H}_{3}}-C\equiv C}}\,-CH{{(C{{H}_{3}})}_{2}}$

C)
$\underset{\text{2-ethyl-3 methyl-but-1-ene}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-\underset{\begin{smallmatrix} || \\ C{{H}_{2}} \end{smallmatrix}}{\mathop{C}}\,-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}}}\,$

D)
$\underset{\text{3-methyl-4 ehtyl heptane}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{\begin{smallmatrix} | \\ C{{H}_{2}}C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}C{{H}_{3}}}}\,$

• question_answer96)                 Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?

A)
Cl < F < S < O

B)
O < S < F < Cl

C)
S < O < Cl < F

D)
F < Cl < O < S

• question_answer97)                 A solution has a 1 : 4 mole ratio of pentane to hexane. The vapour pressure of the pure hydrocarbons at 20°C are 440 mm of Hg for pentane and 120 mm of Hg for hexane. The mole fraction of pentarie in the vapour phase would be:

A)
0.549

B)
0.200

C)
0.786

D)
0.478

• question_answer98)                 4.5 g of aluminium (at. mass 27 amu) is deposited at cathode from $A{{l}^{3+}}$ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from ${{H}^{+}}$ ions in solution by the same quantity of electric charge will be:

A)
22.4 L

B)
44.8 L

C)
5.6 L

D)
11.2 L

• question_answer99)                 The best method for the separation of naphthalene and benzoic acid from their mixture is:

A)
chromatography

B)
crystallization

C)
distillation

D)
sublimation

• question_answer100)                 The mole fraction of the solute in one molal aqueous solution is:

A)
0.027

B)
0.036

C)
0.018

D)
0.009

• question_answer101)                 The main organelle involved in modification and routing of newly synthesized proteins to their destinations is:

A)
mitochondria

B)
endoplasmic reticulum

C)
lysosome

D)
chloroplast

• question_answer102)                 There are two opposing views about origin of Modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of variations of DNA however suggested African origin of Modem man. What kind of observation on DNA variation could suggest this?

A)
Greater variation in Africa than in Asia

B)
Variation only in Asia and no variation in Africa

C)
Greater variation in Asia than in Africa

D)
Similar variation in Africa and Asia

• question_answer103)                 The world's highly prized wool yielding 'Pashmina' breed is:

A)
sheep

B)
goat

C)
goat-sheep cross

D)
Kashmir sheep-Afghan sheep cross

• question_answer104)                 Grey crescent is the area:

A)
at the point of entry of sperm into ovum

B)
just opposite to the site of entry of sperm into ovum

C)
at the animal pole

D)
at the vegetal pole

• question_answer105)                 Photosynthesis in ${{C}_{4}}$ plants is relatively less limited by atmospheric $C{{O}_{2}}$ levels because:

A)
four carbon acids are the primary initial $C{{O}_{2}}$ fixation products

B)
the primary fixation of $C{{O}_{2}}$ is mediated via PEP carboxylase

C)
effective pumping of $C{{O}_{2}}$ into bundle sheath cells

D)
RUBISCO in ${{C}_{4}}$ plants has higher affinity for $C{{O}_{2}}$

• question_answer106)                 At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell?

A)
During entire prophase

B)
During telophase

C)
During S-phase

D)
During ${{G}_{2}}$ stage of prophase

• question_answer107)                 There exists a dose association between the alga and the fungus within a lichen. The fungus:

A)
fixes the atmospheric nitrogen for the alga

B)
provides protection, anchorage and absorption for the alga

C)
provides food for the alga

D)
releases oxygen for the alga

• question_answer108)                 For retting of jute the fermenting microbe used is:

A)
Helkobactor pylori

B)
Mcthophilic bacteria

C)
Streptococcus lactin

D)
Butyric acid bacteria

• question_answer109)                 A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution?

A)
Yellow

B)
Green

C)
Blue

D)
Red

• question_answer110)                 The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is:

A)
20 mm Hg

B)
75 mm Hg

C)
30 mm Hg

D)
50 mm Hg

• question_answer111)                 At which latitude, heat gain through insolation approximately equals heat loss through terrestrial radiation?

A)
${{66}^{o}}$ North and South

B)
$22\frac{1}{2}{{\,}^{o}}$ North and South

C)
${{40}^{o}}$ North and South

D)
$42\frac{1}{2}{{\,}^{o}}$ North and South

• question_answer112)                 A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughters and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease?

A)
Autosomal dominant

B)

C)
Sex-limited recessive

D)

• question_answer113)                 In Ornithine cycle, which of the following wastes are removed from the blood?

A)
Urea and urine

B)
Ammonia and urea

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

D)
$C{{O}_{2}}$ and urea

• question_answer114)                 Telomerase is an enzyme which is a:

A)
repetitive DNA

B)
RNA

C)
simple protein

D)
ribonucleoprotein

• question_answer115)                 During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at that point. What is that sequence called?

A)
CAAT box

B)
GGTT box

C)
AAAT box

D)
TATA box

• question_answer116)                 Centromere is required for:

A)
transcription

B)
crossing over

C)
cytoplasmic cleavage

D)
movement of chromosomes towards poles

• question_answer117)                 Damage to thymus in a child may lead to:

A)
a reduction in haemoglobin content of blood

B)
a reduction in stem cell production

C)
loss of antibody mediated immunity

D)
loss of cell mediated immunity

• question_answer118)                 Prolonged liberal irrigation of agricultural fields is likely to create the problem of:

A)
acidity

B)
aridity

C)
metal toxicity

D)
salinity

• question_answer119)                 Chlorophyll in chloroplasts is located in:

A)
grana

B)
pyrenoid

C)
stroma

D)
both (a) and (c)

• question_answer120)                   Three crops that contribute maximum to global food grain production are:

A)
wheat, rice and maize

B)
wheat, maize and sorghum

C)
rice, maize and sorghum

D)
wheat, rice and barley

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

A)
mitochondrial genome

B)
cytosol

C)
chloroplast genome

D)
nuclear genome

• question_answer122)                 Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain?

A)
Lipase

B)
Exonuclease

C)
Endonuclease

D)
Protease

• question_answer123)                 Match items in column-I with those in Column-II.                                                                                                                                       Column-I                                                   Column-II                            A.  Peritrichous flagellation                          1. Ginkgo                 B.  Living fossil                                                   2. Macrocystes                 C.  Khizophore                                                   3. Escherichia coli                 D.  Smallest flowering plant                         4. SelagmeHa                 E.  Largest perennial alga                              5. Wolffia                 Select the correct answer from the following:

A)
Codes:                                 A             B             C             D             E                                               2              1              3              4              5

B)
5              3              2              5              1

C)
1              2              5              3              2

D)
3              1              4              5              2

• question_answer124)                 The name of Norman Borlaug is associated with:

A)
Green revolution

B)
Yellow revolution

C)
White revolution

D)
Blue revolution

• question_answer125)                 G-6-P dehydrogenase deficiency is associated with haemolysis of:

A)
lymphocytes

B)
RBCs

C)
platelets

D)
leucocytes

• question_answer126)                 In which one pair both the plants can be vegetatively propagated by leaf pieces?

A)
Bryophyllum and Kalanchoe

B)
Chrysanthemum and Agave

C)
Agave and Kalanchoe

D)
Asparagus and Bryophyllum

• question_answer127)                 According to IUCN red list what is the status of red Panda (Athurus fulgens)?

A)
Vulnerable species

B)
Critically endangered species

C)
Extinct species

D)
Endangered species

• question_answer128)                 Which of the following substances, if introduce in the blood stream, would cause coagulation, at the site of its introduction?

A)
Fibrinogen

B)
Prothrombin

C)
Heparin

D)
Thromboplastin

• question_answer129)                 E. coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because:

A)
in the presence of glucose, E. coli cells do not utilize lactose

B)
they cannot transport lactose from the medium into the cell

C)
the lac operon is constitutively active in these cells

D)
they cannot synthesize functional  $\beta$-galactosidase

• question_answer130)                 Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characteristic features of:

A)
polypetalous angiosperms

B)
gamopetalous angiosperms

C)
conifers

D)

• question_answer131)                 Production of a human protein in bacteria by genetic engineering is possible because:

A)
bacterial cell can  carry out the RNA splicing reactions

B)
the human chromosome can replicate in bacterial cell

C)
the  mechanism  of gene  regulation is identical in humans and bacteria

D)
the genetic code is universal

• question_answer132)                 From the following statements select the wrong one:

A)
millepedes have two pairs of appendages in each segment of the body

B)
prawn has two pairs of antennae

C)
animals belonging to phylum-Porifera are exclusively marine

D)
nematocysts   are   characteristic  of the phylum-Cnidaria

• question_answer133)                 Nucleotide are building blocks of nucleic acids, nucleotide is a composite molecule formed by:

A)
(base-sugar-phosphate)

B)
base-sugar-OH

C)
base-sugar-phosphate

D)
sugar-phosphate

• question_answer134)                 More than 70% of world's freshwater is contained in:

A)
Antarctica

B)
Glaciers and Mountains

C)
Greenland

D)
Polar ice

• question_answer135)                 Which one of the following pairs is mismatched?

A)
Biomass burning?release of $C{{O}_{2}}$

B)
Fossil fuel burning?release of $C{{O}_{2}}$

C)

D)
Solar energy?green house effect

• question_answer136)                 Which one of the following characters is not typical of the class-mammalia?

A)
Seven cervical vertebrae

B)
Thecodont dentition

C)
Ten pairs of cranial nerves

D)
Alveolar lungs

• question_answer137)                 Which of the following is the simplest amino acid?

A)
Tyrosine

B)
Asparagine

C)
Glycine

D)
Alanine

• question_answer138)                 Barophilic prokaryotes:

A)
grow slowly in highly alkaline frozen lakes at high altitudes

B)
occur in water containing high concentrations of barium hydroxide

C)
grow and multiply in very deep marine sediments

D)
readily grown and divides in sea water enriched in any soluble salt of barium

• question_answer139)                 Auxospores and hormocysts are formed, respectively, by:

A)
several diatoms and a few cyanobacteria

B)
several cyanobacteria and several diatoms

C)
some diatoms and several cyanobacteria

D)
some cyanobacteria and many diatoms

• question_answer140)                 Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these:

A)
enhance oxidative metabolism

B)
are conjugated proteins

C)
are exclusively synthesized in the body of a living organism as at present

D)
help in regulating metabolism

• question_answer141)                 Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution?

A)
Development of transgenic animals

B)
Production of 'Dolly? the sheep by cloning

C)
Prevalence of pesticide resistant insects

D)
Development of organs from 'stem cells' for organ transplantation

• question_answer142)                 As compared to a ${{C}_{3}}$ plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by ${{C}_{4}}$ plants:

A)
2

B)
6

C)
0

D)
12

• question_answer143)                 In a man, abducens nerve is injured. Which one of the following functions will be affected?

A)
Movement of the eye ball

B)
Swallowing

C)
Movement of the tongue

D)
Movement of the neck

• question_answer144)                 An important step in the manufacture of pulp for paper industry from the woody tissues of plants is the:

A)
preparation of pure cellulose by removing lignin

B)
removal of oils present in the wood by treatment with suitable chemicals

C)
removal of water from the wood by prolonged heating at approximately ${{50}^{o}}C$

D)
treatment of wood with chemical that breakdown cellulose

• question_answer145)                 Protein synthesis in an animal cell occurs:

A)
only on the ribosomes present in cytosol

B)
on ribosomes present in cytoplasm as well as in mitochondria

C)
only on ribosomes attached to the nuclear envelope and endoplasmic reticulum

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

• question_answer146)                 Which of the following is not true for a species?

A)
Members of a species can interbreed

B)
Variations occurs among members of a species

C)
Each species is reproductively isolated from every other species

D)
Gene flow does not occur between the populations of a species

• question_answer147)                 One of the most important functions of botanical gardens is that:

A)
one can observe tropical plants there

B)
they allow ex situ conservation of germplasm

C)
they provide the natural habitat for wild life

D)
they provide a beautiful area for recreation

• question_answer148)                 The ability of the venus flytrap to capture insects is due to:

A)
chemical stimulation by the prey

B)
a passive process requiring no special ability on the part of the plant

C)
specialized ?muscle-like? cells

D)
rapid turgor pressure changes

• question_answer149)                 Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example:

A)
enlargement of body size by swallowing air in puffer fish

B)
melanism in moths

C)
poison fangs in snakes

D)
colour change in chameleon

• question_answer150)                 At a particular locus, frequency of 'A' allele is 0.6 and that of 'a' is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium?

A)
0.16

B)
0.48

C)
0.36

D)
0.24

• question_answer151)                 Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter?

A)
Microbes did not appear in stored meat

B)
Larvae could appear in decaying organic matter

C)
Microbes appeared from unsterilized organic matter

D)
Meat was not spoiled, when heated and kept sealed in a vessel

• question_answer152)                 Biodiversity act of India was passed by the Parliament in the year:

A)
1996

B)
1992

C)
2002

D)
2000

• question_answer153)                 During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP?

A)
Conversion of pyruvic acid to acetyl Co-A

B)
Electron transport chain

C)
Glycolysis

D)
Krebs cycle

• question_answer154)                 A woman with normal vision, but whose father was colour blind, marries a colourblind man. Suppose that the fourth child of this couple was a boy. This boy:

A)
must have normal colour vision

B)
will be partially colourblind since he is heterozygous for the colourblind mutant allele

C)
must be colourblind

D)
may be colourblind or may be of normal vision

• question_answer155)                                 Ectophloic siphonostele is found in:

A)

B)
Osmunda and Equisetum

C)
Marsilea and Botiychium

D)
Dicksonia and maiden hair fern

• question_answer156)                 Which of the following represents the endible part of the fruit of litchi?

A)
Pericarp

B)
Mesocarp

C)
Juicy aril

D)
Endocarp

• question_answer157)                 Carbohydrates, the most abundant biomoiecules on earth, are produced by:

A)
all bacteria, fungi and algae

B)
fungi, algae and green plant cells

C)
some bacteria, algae and green plant cells

D)
viruses, fungi and bacteria

• question_answer158)                 Identify the correctly matched pair:

A)
Montreal protocol - Global warming

B)
Kyoto protocol - Climatic change

C)
Ramsar convention - Ground water pollution

D)
Basal convention - Biodiversity conservation

• question_answer159)                 Which of the following is not a hereditary disease?

A)
Cretinism

B)
Cystic fibrosis

C)
Thalassaemia

D)
Haemophilia

• question_answer160)                 The deficiencies of micro-nutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport?

A)
Cu, Mn, Fe

B)
Co, Ni, Mo

C)
Mn, Co, Ca

D)
Ca, K, Na

• question_answer161)                 de Vries gave his mutation theory on organic evolution while working on:

A)
Akhea rosea

B)
Drosophila melanogaster

C)
Oenothera lamarckiana

D)
Pisum sativum

• question_answer162)                 One of the examples of the action of the autonomous nervous system is:

A)
knee-jerk response

B)
pupillary reflex

C)
swallowing of food

D)
peristalsis of the intestines

• question_answer163)                 Which of the following is not used for disinfection of drinking water?

A)
Phenyl

B)
Chloramine

C)
Chlorine

D)
Ozone

• question_answer164)                 Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on:

A)

B)
accumulation of K ions

C)
accumulation of Na ions

D)
membrane potential

• question_answer165)                 Parkinson's disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter:

A)
acetylcholine

B)
norepinephrine

C)
dopamine

D)
GABA

• question_answer166)                 All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia:

A)
can induce root nodules on many plant species

B)
can fix nitrogen in the free-living state

C)
like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host's cortex

D)
forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids

• question_answer167)                                         An acromian process is characteristically found in die:

A)
pelvic girdle of mammals

B)
skull of frog

C)
pectoral girdle of mammals

D)
sperm of mammals

• question_answer168)                 In a type of apomixis known as adventive embryony, embryos develop directly from the:

A)
nucellus or integuments

B)
synergids or antipodals in an embryo sac

C)
accessory embryo sacs in the ovule

D)
zygote

• question_answer169)                 Through which cell of the embryo sac, does the pollen tube enter the embryo sac?

A)
Egg cell

B)
Central cell

C)
Persistant synergid

D)
Degenerated synergid

• question_answer170)                 Epithelial cells of the intestine involved in food absorption have on their surface:

A)
pinocytic vesicles

B)
phagocytic vesicles

C)
zymogen granules

D)
micro-villi

• question_answer171)                 A patient is generally advised to specially; consume more meat, lentils, milk and eggs in diet only when he suffers from:

A)
kwashiorkor

B)
rickets

C)
anaemia

D)
scurvy

• question_answer172)                 Which one of the following pairs is mismatched?

A)
Savanna                               ? Acacia trees

B)
Prairie                                   ? epiphytes

C)
Tundra                                  ? permafrost

D)
Coniferous forest            ? evergreen trees

• question_answer173)                 Which of the following is the relatively most accurate method for dating of fossils?

A)
Potassium - argon method

B)

C)
Electron - spin resonance method

D)
Radio - carbon method

• question_answer174)                 Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?

A)
Circinotropous

B)
Anatropous

C)
Amphitropous

D)
Atropous

• question_answer175)                 Potometer works on the principle of:

A)
amount of water absorbed equals the amount transpired

B)
osmotic pressure

C)
root pressure

D)
potential difference between the tip of the tube and that of the plant

• question_answer176)                 In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues?

A)
Stem and root

B)
All parts

C)
Shoot tips and root tips

D)
Flowers, fruits and leaves

• question_answer177)                 Which one of the following makes use of RNA as a template to synthesize DNA?

A)
Reverse transcriptase

B)
DNA dependant RNA polymerase

C)
DNA polymerase

D)
RNA polymerase

• question_answer178)                 In contrast to annelids the platyhelminths show:

A)

B)
presence of pseudocoel

C)
bilateral symmetry

D)
absence of body cavity

• question_answer179)                 Which of the following statements regarding enzyme inhibition is correct?

A)
Non-competitive inhibition of an enzyme can he overcome by adding large amount of substrate

B)
Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein

C)
Competitive inhibition is seen when the substrate and the inhibitor compete

D)
Non-competitive inhibitors often bind to the enzyme irreversibly

• question_answer180)                 Which of the following pairs is correctly matched?

A)
Cartilaginous joint            ?   skull bones

B)
Hinge joint                          ? between vertebrae

C)
Fibrous joint                       ? between phalanges

D)
Gliding joint                        ? between zygapophyses of the successive vertebrae

• question_answer181)                 The catalytic efficiency of two different enzymes can be compared by the:

A)
the Revalue

B)
the pH optimum value

C)
formation of the product

D)
molecular size of the enzyme

• question_answer182)                 Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originate as adaptation. These imprints need to be used:

A)
only on plates with streptomycin

B)
on plates with minimal medium

C)
only on plates without streptomycin

D)
on plates with and without streptomycin

• question_answer183)                 Which of the following is generally used for induced mutagenesis in crop plants?

A)
Alpha particles

B)
X-rays

C)
UV (260 nm)

D)
Gamma rays (from cobalt 60)

• question_answer184)                 Haemophilia is more commonly seen in human males than in human females because:

A)
this disease is due to an X-linked dominant mutation

B)
a greater proportion of girls die in infancy

C)
this disease is due to an X-linked recessive mutation

D)
this disease is due to a Y-linked recessive mutation

• question_answer185)                 A woman with 47 chromosomes due to three copies of chromosome 21 is characterized by:

A)
Down syndrome

B)
triploidy

C)
Turner syndrome

D)
super femaleness

• question_answer186)                 In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype:

A)
aaBB

B)
AaBb

C)
AABB

D)
aabb

• question_answer187)                 Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cells of the following. Which of the cells are least likely to be replaced by new cells?

A)
Osteocytes

B)
Malpighian layer of the skin

C)
Liver cells

D)
Neurons

• question_answer188)                 Secretin and cholecystokinin are digestive hormones. They are secreted in:

A)
oesophagus

B)
ileum

C)
duodenum

D)
pyloric stomach

• question_answer189)                 Which of the following unicellular organism has a macro-nucleus for trophic function and one or more micro-nuclei for reproduction?

A)
Euglena

B)
Amoeba

C)
Paramecium

D)
Trypanosoma

• question_answer190)                 AIDS is caused by HTV that principally infects:

A)
all lymphocytes

B)
activator B cells

C)
${{T}_{4}}$ lymphocytes

D)
cytotoxic T cells

• question_answer191)                 According to widely accepted ?fluid mosaic model? cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect?

A)
Proteins in cell membranes can travel within the lipid bilayer

B)
Proteins can remain confined within certain domains of the membrane

C)
Proteins can also undergo flip-flop movements in the lipid bilayer

D)
Many proteins remain completely embedded within the lipid bilayer

• question_answer192)                 If mammalian ovum fails 10 get fertilized, which one of the following is unlikely?

A)
Corpus luteum will disintegrate

B)
Estrogen secretion further decreases

C)
Primary follicle starts developing

D)
Progesterone secretion rapidly declines

• question_answer193)                 A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of:

A)
fats

B)
ketones

C)
amino acids

D)
glucose

• question_answer194)                 Why is vivipary an undesirable character for annual crop plants?

A)
It reduces the vigour of plant

B)
The seeds cannot be stored under normal conditions for the next season

C)
The seeds exhibit long dormancy

D)
It adversely affects the fertility of the plant

• question_answer195)                 Bacillus thuringiensis (Bt) strains have been used for designing novel:

A)
bio-metallurgical technique

B)
bio-mineralization processes

C)
bio-insecticidal plants

D)
bio-fertilizers

• question_answer196)                 The salivary gland chromosomes in the dipteran larvae, are useful in gene mapping because:

A)
these are much longer in size

B)
these are easy to stain

C)
these are fused

D)
they have endoreduplicated chromosomes

• question_answer197)                 Which group of three of the following five statements (1-5) contain is all three correct statements regarding beri-beri?                                                                                                                                                                            A. A crippling disease prevalent among the native population of sub-Sahara Africa.                 B. A deficiency disease caused by lack of thiamine (vitamin ${{B}_{1}}$).                 C.A nutritional disorder in infants and young children when the diet is persistently deficient in essential protein.                 D. Occurs in those countries where the staple diet is polished rice.                 E. The symptoms are pain from neuritis, paralysis, muscle wasting, progressive oedema, mental deterioration and finally heart failure.

A)
A, B and D

B)
B, C and E

C)
A, C and E

D)
B, D and E

• question_answer198)                 Photosynthetic Active Radiation (PAR) has the following range of wavelengths:

A)
400-700 nm

B)
450-950 nm

C)
340-450-nm

D)
500-600 nm

• question_answer199)                 Golden rice is a transgenic crop of the future with the following improved trait:

A)
high lysine (essential amino acid) content

B)
insect resistance

C)
high protein content

D)
high vitamin A content

• question_answer200)                 Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness?

A)
Valium

B)
Morphine

C)
Hashish

D)
Amphetamines