Solved papers for Punjab Medical Punjab - MET Solved Paper-2010

done Punjab - MET Solved Paper-2010

• question_answer1) A circular thin disc of mass$2kg$has a diameter$0.2m$. Calculate its moment of inertia about an axis passing through the edge and perpendicular to the plane of the disc $(in\text{ }kg-{{m}^{2}})$.

A) $0.01$

B) $0.03$

C) $0.02$

D) $3$

• question_answer2) In a step-up transformer the voltage in the primary is $220V$ and die current is$5A$. The secondary voltage is found to be$22000V$. The current in the secondary (neglect losses) is

A) $5A$

B) $50A$

C) $500A$

D) $0.05A$

• question_answer3) An electron tube was sealed-off during manufacture at a pressure of $1.2\times {{10}^{-7}}mm$ of mercury at${{27}^{o}}C$. Its volume is $100c{{m}^{3}}$. The number of molecules that remain in the tube is

A) $2\times {{10}^{16}}$

B) $3\times {{10}^{15}}$

C) $3.86\times {{10}^{11}}$

D) $5\times {{10}^{11}}$

• question_answer4) The unit of specific conductivity is

A) $\Omega c{{m}^{-1}}$

B) $\Omega c{{m}^{-2}}$

C) ${{\Omega }^{-1}}cm$

D) ${{\Omega }^{-1}}c{{m}^{-1}}$

• question_answer5) If $70cal$ of heat is required to raise the temperature of 2 mole of an ideal gas at constant pressure from${{30}^{o}}C$to${{35}^{o}}C$, then the amount of heat required to raise the temperature of same gas through same range at constant volume is

A) $50cal$

B) $70cal$

C) $60cal$

D) $65cal$

• question_answer6) Power supplied to a particle of mass $2kg$ varies with time as$P=3{{t}^{2}}/2$watt, where t is in second. If velocity of particle at $t=0$ is$v=0,$the velocity of particle at$t=2s$will be

A) $1m{{s}^{-1}}$

B) $4m{{s}^{-1}}$

C) $2m{{s}^{-1}}$

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

• question_answer7) A short bar magnet placed with its axis at${{30}^{o}}$with a uniform external magnetic field of$0.16\,T$experiences a torque of magnitude$0.032J$. The magnetic moment of the bar magnet will be

A) $0.23\,\,J{{T}^{-1}}$

B) $0.40\,\,J{{T}^{-1}}$

C) $0.80\,\,J{{T}^{-1}}$

D) zero

• question_answer8) A bar magnet of length 3 cm has points$A$and$B$along its axis at distances of $24cm$ and $48cm$ on the opposite sides. Ratio of magnetic fields at these points will be

A) $8$

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

C) $3$

D) $4$

• question_answer9) A stone is dropped from a certain height which can reach the ground in 5s. If the stone is stopped after 3 s of its fall and then allowed to fall again, then the time taken by the stone to reach the ground for die remaining distance is

A) $2s$

B) $3s$

C) $4s$

D) None of these

• question_answer10) Two point-charges $\pm 10\mu C$ are placed $5.00mm$ apart, forming an electric dipole. Compute electric field at a point on the axis of the dipole $15cm$ away from the centre on a line passing through the centre dipole.

A) $1.66\times {{10}^{5}}N{{C}^{-1}}$

B) $3.66\times {{10}^{5}}N{{C}^{-1}}$

C) $2.66\times {{10}^{-5}}N{{C}^{-1}}$

D) $2.66\times {{10}^{5}}N{{C}^{-1}}$

• question_answer11) In an$AC$circuit the potential difference V and current i are given respectively by $V=100\sin (100t)volt$and$i=100\sin \left( 100t+\frac{\pi }{3} \right)mA$ The power dissipated in the circuit will be

A) ${{10}^{4}}W$

B) $10W$

C) $2.5W$

D) $5W$

• question_answer12) An inductor$L,\,\,a$capacitor of$20\mu F$and a resistor of $10\Omega$ are connected in series with an AC source of frequency$50Hz$. If the current is in phase with the voltage, then the inductance of the inductor is

A) $2.00H$

B) $0.51H$

C) $1.5H$

D) $0.99H$

• question_answer13) A rifle shoots a bullet with a muzzle velocity of$500m{{s}^{-1}}$at a small target $50m$ away. To hit the target the rifle must be aimed$(take$$g=10m{{s}^{-2}})$

A) exactly at the target

B) $10cm$ below the target

C) $10cm$ above the target

D) $5cm$ above the target

• question_answer14) An $\alpha -$particle of mass $m$ suffers one dimensional elastic collision with a nucleus of unknown mass. After the collision the $\alpha -$particle is scattered directly backwards losing$75%$of its kinetic energy. Then the mass of the nucleus is

A) $m$

B) $2m$

C) $3m$

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

• question_answer15) Mark the correct one.

A) Our eyes can distinguish between real and virtual image

B) Virtual image can also be taken on screen

C) If the incident rays are converging at a point, then the object is real

D) None of the above

• question_answer16) A body is suspended from a spring balance kept in a satellite. The reading of the balance is${{W}_{1}}$ when the satellite goes in an orbit of radius$R$ and is${{W}_{2}}$when it goes in an orbit of radius$2R$. Which of the following will be correct?

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

B) ${{W}_{1}}<{{W}_{2}}$

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

D) ${{W}_{1}}\ne {{W}_{2}}$

• question_answer17) The force required to separate two glass plates of area${{10}^{-2}}{{m}^{2}}$with a film of water$0.05mm$ thick between them, is (surface tension of water is$70\times {{10}^{-3}}N/m$)

A) $28N$

B) $14N$

C) $50N$

D) $38N$

• question_answer18) A body of mass m is placed on the earths surface. It is taken from earths surface to a height$h=3R$. The change in gravitational potential energy of the body is

A) $\frac{2}{3}mgR$

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

C) $\frac{mgR}{2}$

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

• question_answer19) The only property possessed by ferromagnetic substance is

A) hysteresis

B) susceptibility

C) directional property

D) attracting magnetic substances

• question_answer20) Which logic gate is represented by the following combination of logic gates?

A) $OR$

B) $NAND$

C) $AND$

D) $NOR$

• question_answer21) Minimum light intensity that can be perceived by normal human eye is about${{10}^{-10}}Wb\,\,{{m}^{-2}}$. What is the minimum number of photons of wavelength 660 nm that must enter the pupil in$1s$for one to see the object? Area of cross-section of the pupil is${{10}^{-4}}{{m}^{2}}$.

A) $3.3\times {{10}^{2}}$

B) $3.3\times {{10}^{3}}$

C) $3.3\times {{10}^{4}}$

D) $3.3\times {{10}^{5}}$

• question_answer22) A thin convergent glass lens $\mu =1.5$ has a power of$+5.0D$. When this lens is immersed in a liquid of refractive index ${{\mu }_{1}}$ it acts as a diverging lens of focal length$100cm$. The value of${{\mu }_{l}}$should be

A) $\frac{3}{2}$

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

C) $\frac{5}{3}$

D) $2$

• question_answer23) The phase difference between two points separated by$0.8m$, in a wave of frequency$120Hz$, is$\frac{\pi }{2}$. The velocity of wave is

A) $720m{{s}^{-1}}$

B) $384m{{s}^{-1}}$

C) $250m{{s}^{-1}}$

D) $1m{{s}^{-1}}$

• question_answer24) A ball of mass$m$and density$\rho$is immersed in a liquid of density$\rho$at a depth$h$and released. To what height will the ball jump up above the surface of liquid? (Neglect the resistance of water and air)

A) $h$

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

C) $3h$

D) $2h$

• question_answer25) Dimensions of resistance in an electrical circuit, in terms of dimensions of mass$M$, of length$L$, of time$T$and of current$I$, would be

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

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

C) $[M{{L}^{2}}{{T}^{-1}}{{I}^{-1}}]$

D) $[M{{L}^{2}}{{T}^{-3}}{{I}^{-2}}]$

• question_answer26) The plane of a dip circle is set in the geographic meridian and the apparent dip is${{\delta }_{1}}$. It is then set in a vertical plane perpendicular to the geographic meridian. The apparent dip angle is ${{\delta }_{2}}$.The decimation$\theta$at the plane is

A) $\theta ={{\tan }^{-1}}(\tan {{\delta }_{1}}\tan {{\delta }_{2}})$

B) $\theta ={{\tan }^{-1}}(\tan {{\delta }_{1}}+\tan {{\delta }_{2}})$

C) $\theta ={{\tan }^{-1}}\left( \frac{\tan {{\delta }_{1}}}{\tan {{\delta }_{2}}} \right)$

D) $\theta ={{\tan }^{-1}}(\tan {{\delta }_{1}}-\tan {{\delta }_{2}})$

• question_answer27) A body starts from the origin and moves along the axis such that the velocity at any instant is given by$v=4{{t}^{3}}-2t$where t is in second and the velocity is in$m/s$. Find the acceleration of the particle when it is at a distance of $2m$ from the origin.

A) $28m{{s}^{-2}}$

B) $22m{{s}^{-2}}$

C) $12m{{s}^{-2}}$

D) $10m{{s}^{-2}}$

• question_answer28) The resistance of a wire at${{20}^{o}}C$is $20\Omega$ and at ${{500}^{o}}C$is$60\Omega$. At which temperature its resistance will be$25\Omega$?

A) ${{50}^{o}}C$

B) ${{60}^{o}}C$

C) ${{70}^{o}}C$

D) ${{80}^{o}}C$

• question_answer29) A voltmeter of resistance$1000\Omega$gives full scale deflection when a current of $100mA$ flows through it. The shunt resistance required across it to enable it to be used as an ammeter reading $1A$ at full scale deflection is

A) $10000\Omega$

B) $9000\Omega$

C) $222\Omega$

D) $111\Omega$

• question_answer30) A particle having a mass of $0.5g$ carries a charge of$2.5\times {{10}^{-8}}C$. The particle is given an initial horizontal velocity of$6\times {{10}^{4}}m{{s}^{-1}}$. The minimum magnitude of the magnetic field that is required so that, particle will keep moving in a horizontal direction is [take$g=10m{{s}^{-2}}$]

A) $8.46T$

B) $3.33T$

C) $8.64\times {{10}^{-2}}T$

D) None of these

• question_answer31) A wire in the form of a circular loop of radius$r$lies with its plane normal to a magnetic field$B.$ If the wire is pulled to take a square shape in the same plane in time$t$, the emf induced in the loop is given by

A) $\frac{\pi B{{r}^{2}}}{t}\left( 1-\frac{\pi }{10} \right)$

B) $\frac{\pi B{{r}^{2}}}{t}\left( 1-\frac{\pi }{8} \right)$

C) $\frac{\pi B{{r}^{2}}}{t}\left( 1-\frac{\pi }{6} \right)$

D) $\frac{\pi B{{r}^{2}}}{t}\left( 1-\frac{\pi }{4} \right)$

• question_answer32) 25 tuning forks are arranged in series in the order of decreasing frequency. Any two successive forks produce 3 beats/s. If the frequency of the first tuning fork is the octave of the last fork, then the frequency of the 21st fork is

A) $72Hz$

B) $288Hz$

C) $84Hz$

D) $87Hz$

• question_answer33) If the red light is replaced by blue light illuminating the object in a microscope the resolving power of the microscope

A) decreases

B) increases

C) gets halved

D) remains unchanged

• question_answer34) Five identical lamps grouped together produce a certain illumination on a screen kept 5 m from the lamps. If three of the lamps are switched-off, through what distance should the group of lamps be moved to obtain the same illumination on the screen? (Assume normal incidence)

A) $\sqrt{10}m$towards the screen

B) $(5+\sqrt{10})m$towards the screen

C) $(5-\sqrt{10})m$towards the screen

D) $(5-\sqrt{10})m$away from the screen

• question_answer35) A body of mass $2kg$ makes an elastic collision with another body at rest and continues to move in the original direction with one-fourth its original speed. The mass of the second body which collides with the first body is

A) $2kg$

B) $1.2kg$

C) $3kg$

D) $1.5kg$

• question_answer36) In Youngs double slit experiment, the intensity of light coming from one of the slits is doubled the intensity from the other slit. The ratio of the maximum intensity to the minimum intensity in the interference fringe pattern observed is

A) 34

B) 40

C) 25

D) 38

• question_answer37) A rocket of initial mass $1000kg$ ejects mass at a constant rate of $10kg/s$ with constant relative speed of$11m{{s}^{-1}}$. Neglecting gravity, the acceleration of the rocket 1 min after the blast is

A) $11/40m{{s}^{-2}}$

B) $22/40m{{s}^{-2}}$

C) $1.1/40m{{s}^{-2}}$

D) $1m{{s}^{-2}}$

• question_answer38) An elastic ball is dropped from a height$h$and it rebounds many times from the floor. If the coefficient of restitution is$e$, the time interval between the second and the third impacts, is

A) $ev/g$

B) ${{e}^{2}}v/g$

C) ${{e}^{2}}\sqrt{\left( \frac{8h}{g} \right)}$

D) ${{e}^{2}}\sqrt{\left( \frac{h}{g} \right)}$

• question_answer39) An adulterated sample of milk has a density of$1032kg{{m}^{-3}}$, while pure milk has a density of$1080kg{{m}^{-3}}$. Then the volume of pure milk in a sample of $10L$ of adulterated milk is

A) $0.5L$

B) $1.0L$

C) $2.0L$

D) $4.0L$

• question_answer40) Typical silt (hard mud) particle of radius$20\mu m$is on the top of lake water, its density is $2000kg/{{m}^{3}}$ and the viscosity of lake water is$1.0mPa$, density is$1000\text{ }kg/{{m}^{3}}$. If the lake is still (has no internal fluid motion) the terminal speed with which the particle hits the bottom of the lake is in$mm/s$

A) $0.67$

B) $0.77$

C) $0.87$

D) $0.97$

• question_answer41) The following diagram indicates the energy levels of a certain atom when the system moves from $4E$ level to$E$. A photon of wavelength$\lambda$, is emitted. The wavelength of photon produced during its transition from$\frac{7}{3}E$ level to$E$is${{\lambda }_{2}}$. The ratio$\frac{{{\lambda }_{1}}}{{{\lambda }_{2}}}$will be

A) $\frac{9}{4}$

B) $\frac{4}{9}$

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

D) $\frac{7}{3}$

• question_answer42) A thin ring of mass $2.7kg$ and radius $8cm$ rotates about an axis through its centre and perpendicular to the plane of the ring at$1.5rev/s$. Calculate the kinetic energy of the ring.

A) $0.763\,\,J$

B) $0.345\,\,J$

C) $1.5\,\,J$

D) zero

• question_answer43) Two bodies at different temperatures are mixed in a calorimeter. Which of the following quantities remains conserved?

A) Sum of the temperatures of the two bodies

B) Total heat of the two bodies

C) Total internal energy of the two bodies

D) Internal energy of each body

• question_answer44) Mark the correct option.

A) In electrostatics, there is no motion of charge at all in conductors bulk

B) In electrostatics, there is a motion of charged particle in conductors bulk

C) In electrostatics and current electricity there is a net motion of charged particles in the bulk of the material of the conductor

D) In electrostatics and current electricity there is no net motion of charged particles in die bulk of the material of the conductor

• question_answer45) Binding energy of nucleus is defined as

A) the energy released, when the nucleus has been separated into its constituent particles

B) the energy added, to separate the nucleus from its constituent particles

C) the energy added to form the nucleus from its constituent particles

D) None of the above

• question_answer46) The magnetic field in a region between the poles of an electromagnet is uniform at any time, but its magnitude is increasing at the rate of$0.02\text{ }T/s$. A conducting loop is placed in this region, whose plane is perpendicular to the direction of magnetic field. Calculate the emf induced and induced current in the loop. Take cross-section area of loop as $120c{{m}^{2}}$ and resistance of loop as$5\Omega$.

A) $0.48\,\,V,\,\,0.0096\,\,mA$

B) $0.48\,\,mV,\,\,0.0096\,\,mA$

C) $0.24\,\,mV,\,\,0.048\,\,mA$

D) $0.24\,\,mV,\,\,Zero$

• question_answer47) A car travels 15 km east at a constant speed of$20km/h$, then continues east for $20km$ at a constant speed of$30km/h$. What can be said about the magnitude of average velocity?

A) ${{v}_{av}}>25km/h$

B) ${{v}_{av}}<25km/h$

C) ${{v}_{av}}=25km/h$

D) Information is insufficient

• question_answer48) A body when projected vertically up covers a total distance 5, during its time of flight. If we neglect gravity then how much distance the particle will travel during the same time? Will it fall back?

A) $s,$Yes

B) $s,$No

C) $2s,$Yes

D) $2s,$No

• question_answer49) If $i$ is increasing continuously, then find the direction of induced current in the loop.

A) Anticlockwise

B) Clockwise

C) In any direction

D) No current will be induced

• question_answer50) A vehicle of mass $m$ is moving on a rough horizontal road with momentum$p$. If the coefficient of friction between the tyres and the road be$\mu$, then the stopping distance is

A) $\frac{p}{2\mu mg}$

B) $\frac{{{p}^{2}}}{2\mu mg}$

C) $\frac{p}{2\mu {{m}^{2}}g}$

D) $\frac{{{p}^{2}}}{2\mu {{m}^{2}}g}$

• question_answer51) The structure of 4-methyl-2-pentene-1-ol is

A) $C{{H}_{3}}-C{{H}_{2}}-HC=CH-C{{H}_{2}}OH$

B) $C{{H}_{3}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{CH}}\,-HC=CH-C{{H}_{2}}OH$

C) $C{{H}_{3}}-\overset{\begin{smallmatrix} OH \\ | \end{smallmatrix}}{\mathop{CHCH}}\,=\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}$

D) $C{{H}_{3}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,=CH-C{{H}_{2}}C{{H}_{2}}OH$

A) $N{{a}_{2}}C{{O}_{3}}\cdot {{H}_{2}}O$

B) $NaOH$

C) $NaHC{{O}_{3}}$

D) $N{{a}_{2}}C{{O}_{3}}$

• question_answer53) Tritium is an isotope of

A) hydrogen

B) titanium

C) tantalum

D) tellurium

• question_answer54) When a nucleus emits an alpha particle, its atomic mass

A) decreases by 2 units

B) increases by 2 units

C) decreases by 4 units

D) increases by 4 units

• question_answer55) Which of the following is present in tenon?

A) ${{F}_{2}}$

B) $C{{l}_{2}}$

C) ${{I}_{2}}$

D) $B{{r}_{2}}$

• question_answer56) The chemical which is known as the king of chemicals is

A) sodium hydroxide

B) sulphuric acid

C) calcium carbonate

D) ammonium sulphate

• question_answer57) Carborundum is the name of

A) $A{{l}_{2}}{{O}_{3}}$

B) $SiC$

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

D) $HP{{O}_{3}}$

• question_answer58) The $P-P-P$ bond angle in white phosphorus is

A) ${{120}^{o}}$

B) ${{109}^{o}},\,\,28$

C) ${{90}^{o}}$

D) ${{60}^{o}}$

• question_answer59) The fertilizer named Nitrolim is prepared by the use of

A) $CaO+{{N}_{2}}$

B) $CaC+{{N}_{2}}$

C) $Ca{{C}_{2}}+N$

D) $Ca{{C}_{2}}+{{N}_{2}}$

• question_answer60) Which one is the correct representation of$NH_{4}^{+}$ion?

A) $\left( \underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{H-N\to H}}}\, \right)$

B) $\left( \underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{H-N\leftarrow H}}}\, \right)$

C) $\left( \underset{\begin{smallmatrix} \uparrow \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ \downarrow \end{smallmatrix}}{\mathop{H\to N-H}}}\, \right)$

D) $\left( \underset{\begin{smallmatrix} \downarrow \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ \uparrow \end{smallmatrix}}{\mathop{H\leftarrow N\to H}}}\, \right)$

• question_answer61) What is the boiling point of a solution containing $0.456g$ of camphor (molar mass$=152$) dissolved in $31.4g$ of acetone$(b.p={{56.30}^{o}}C)$, if the molecular elevation constant per $100g$ of acetone is${{17.2}^{o}}C$?

A) ${{56.46}^{o}}C$

B) ${{36.56}^{o}}C$

C) ${{56.14}^{o}}C$

D) ${{72.52}^{o}}C$

• question_answer62) What according to Fajans rules leads to increased ionic character?

A) Large cation and small anion

B) Small cation and small charge on cation

C) Small cation and large charge on cation

D) Large cation and large charge on cation

• question_answer63) The reaction given below is known as Dry ether${{C}_{6}}{{H}_{5}}Br+2Na+BrC{{H}_{3}}\xrightarrow{Dry\,\,ether}$${{C}_{6}}{{H}_{5}}C{{H}_{3}}+2NaBr$

A) Wurtzs reaction

B) Wurtz Fittigs reaction

C) Friedel-Crafts reaction

D) Wurtz and Crafts reaction

• question_answer64) Compound$A$on reduction gives$B$, which on further reaction with$CHC{{l}_{3}}$and alcoholic$KOH$ gives compound$C$, which on further hydrolysis gives aniline. The compound$A$is

A) nitrobenzene

B) methylamine

C) nitromethane

D) nitro sobenzene

• question_answer65) DDT is formed from

A) benzene and chlorobenzene

B) chloral and chlorobenzene

C) chloral and benzene

D) chlorobenzene and chlorine

• question_answer66) Freon-114 is an organic substance used in refrigerators and air conditioners. It is chemically called 1, 2-dichloro tetrafluoroethane. Its correct formula is

A) $Cl-\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\overset{\begin{smallmatrix} F \\ | \end{smallmatrix}}{\mathop{C}}}\,-\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\overset{\begin{smallmatrix} F \\ | \end{smallmatrix}}{\mathop{C}}}\,-H$

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

C) $F-\underset{\begin{smallmatrix} | \\ F \end{smallmatrix}}{\overset{\begin{smallmatrix} Cl \\ | \end{smallmatrix}}{\mathop{C}}}\,-\underset{\begin{smallmatrix} | \\ F \end{smallmatrix}}{\overset{\begin{smallmatrix} F \\ | \end{smallmatrix}}{\mathop{C}}}\,-F$

D) $F-\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\overset{\begin{smallmatrix} F \\ | \end{smallmatrix}}{\mathop{C}}}\,-\underset{\begin{smallmatrix} | \\ F \end{smallmatrix}}{\overset{\begin{smallmatrix} Cl \\ | \end{smallmatrix}}{\mathop{C}}}\,-\underset{\begin{smallmatrix} | \\ F \end{smallmatrix}}{\overset{\begin{smallmatrix} F \\ | \end{smallmatrix}}{\mathop{C}}}\,-F$

• question_answer67) Which disaccharide is present in milk?

A) Sucrose

B) Lactose

C) Maltose

D) Ketose

• question_answer68) Emulsifier is an agent which

A) accelerates the dispersion

B) stabilises the emulsion

C) homogenises the emulsion

D) None of the above

• question_answer69) For a chemical reaction$xA\to yM$rate law is$r=k{{[A]}^{3}}$. If the concentration of A is doubled, the reaction rate will be

A) doubled

C) increased 4 times

D) increased 8 times

• question_answer70) The formula representing correct relationship between${{K}_{c}}$and${{K}_{p}}$in gaseous equilibrium is

A) $\frac{{{K}_{p}}}{RT}={{({{K}_{c}})}^{\Delta {{n}_{g}}}}$

B) $\frac{{{K}_{c}}}{RT}={{({{K}_{p}})}^{\Delta {{n}_{g}}}}$

C) ${{K}_{p}}={{K}_{c}}{{(RT)}^{\Delta {{n}_{g}}}}$

D) ${{K}_{c}}={{K}_{p}}{{(RT)}^{\Delta {{n}_{g}}}}$

• question_answer71) The bond order of a molecule is given by

A) the difference between the number of electrons in bonding and anti bonding orbitals

B) total number of electrons in bonding and anti bonding orbitals

C) twice the difference between the number of electrons in bonding and anti bonding orbitals

D) half the difference between number of electrons in bonding and anti bonding orbitals

• question_answer72) Presence ofanitro group in a benzene ring

A) renders the ring basic

B) deactivates the ring towards nucleophilic substitution

C) deactivates the ring towards electrophilic substitution

D) activates the ring towards electrophilic substitution

• question_answer73) Doping of silicon$(Si)$with boron$(B)$leads to

A) $n-$type semiconductor

B) $p-$type Semiconductor

C) metal

D) insulator

• question_answer74) The standard emf of a cell, involving one electron change is found to be $0.591V$ at${{25}^{o}}C.$ The equilibrium constant of the reaction is$(F=96500\,\,C\,\,mo{{l}^{-1}})$

A) $1.0\times {{10}^{1}}$

B) $1.0\times {{10}^{5}}$

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

D) $1.0\times {{10}^{30}}$

• question_answer75) Term catalyst was given by

A) Rutherford

B) Berzilius

C) Wohler

D) Kolbe

• question_answer76) The following acids have been arranged in the order of decreasing acid strength. Identify the correct order $ClOH(I)\,\,\,BrOH(II)\,\,\,IOH(III)$

A) $I>II>III$

B) $II>I>III$

C) $III>II>I$

D) $I>III>II$

• question_answer77) $Xe{{F}_{2}}$on hydrolysis gives

A) $Xe{{O}_{3}}$

B) $XeO$

C) $Xe$

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

• question_answer78) The properties of$Zr$and$Hf$are similar because

A) both belong to $d-$block

B) both belong to same group of Periodic Table

D) both have same number of electrons

• question_answer79) The reaction of${{K}_{2}}C{{r}_{2}}{{O}_{7}}$with$NaCl$and conc. ${{H}_{2}}S{{O}_{4}}$gives

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

B) $C{{r}_{2}}{{O}_{3}}$

C) $CrC{{l}_{3}}$

D) $CrOC{{l}_{2}}$

• question_answer80) What is the expected structure of the organic product when ethylmagnesium bromide is treated with heavy water$({{D}_{2}}O)$?

A) ${{C}_{2}}{{H}_{5}}-{{C}_{2}}{{H}_{5}}$

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

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

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

• question_answer81) The reaction,${{(C{{H}_{3}})}_{3}}C-Br\xrightarrow{{{H}_{2}}O}{{(C{{H}_{3}})}_{3}}C-OH$is

A) elimination reaction

B) substitution reaction

• question_answer82) Name of the compound given below is

A) 4-ethyl-3-methyloctane

B) 3-methyl-4-ethyloctane

C) 2, 3-diethylheptane

D) 5-ethyl-6-methyloctane

• question_answer83) Which of the following is not true for${{[Co{{(F)}_{6}}]}^{3-}}$?

A) It is paramagnetic due to the presence of 4 unpaired electrons

B) It has coordination number of 6

C) It is outer orbital complex

D) It involves${{d}^{2}}s{{p}^{3}}$hybridisation

• question_answer84) When one mole of each of the following complex salts is treated with excess of $AgN{{O}_{3}},$ which of them gives maximum amount of$AgCl$?

A) $[Co{{(N{{H}_{3}})}_{6}}]C{{l}_{3}}$

B) $[Co{{(N{{H}_{3}})}_{5}}Cl]C{{l}_{2}}$

C) $[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]Cl$

D) $[Co{{(N{{H}_{3}})}_{3}}C{{l}_{3}}]$

• question_answer85) Reimer-Tiemann reaction is useful for the preparation of

A) benzaldehyde

B) salicylaldehyde

C) toluene

D) acetophenone

• question_answer86) Which of the following compounds will produce the most stable carbonium ion when subjected to dehydration?

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

B) $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}}\,-OH$

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

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

• question_answer87) In$CC{{l}_{4}}$, the four valencies of carbon are directed towards the comers of a

A) cube

B) hexagon

C) prism

D) tetrahedron

• question_answer88) Fixation of nitrogen means

A) manufacture of nitrogen from air

B) nitrogen cycle in nature

C) decomposition of nitrogen

D) conversion of atmospheric nitrogen into nitrogen compounds

• question_answer89) Water is said to be permanently hard, when it contains

A) chlorides and sulphates of$Mg$and$Ca$

B) bicarbonates of$Mg$and$Ca$

C) sulphates of$Cu$and$Hg$

D) carbonates and bicarbonates of$Mg$and$Sr$

• question_answer90) Given below is a statement and a reason

 I. Statement: Water has a higher boiling point than${{H}_{2}}S$. II. Reason: At room temperature water is a liquid while ${{H}_{2}}S$is a gas.
Which of the following are true?

A) Both I and II are correct however II does not give any proper explanation for statement I.

B) Both I and II are correct, II gives the proper explanation for statement I

C) Both I and II are incorrect

D) I is correct but II is incorrect

• question_answer91) The oxidation number of$C$in$C{{H}_{4}},\,\,C{{H}_{3}}Cl$,$CHC{{l}_{3}},\,\,C{{H}_{2}}C{{l}_{2}}$and$CC{{l}_{4}}$is respectively

A) $-4,\,\,-2,\,\,+2,\,\,0,\,\,+4$

B) $+2,\,\,4,\,\,0,\,\,-2,\,\,-4$

C) $+4,\,\,+0,\,\,-2,\,\,-2,\,\,+4$

D) $0,\,\,2,\,\,-2,\,\,4,\,\,4$

• question_answer92) $Z{{n}^{2+}}(aq)+2{{e}^{-}}\xrightarrow{{}}Zn(s)$. This is

A) oxidation

B) reduction

C) redox reaction

D) hydrolysis

• question_answer93) The cause of Brownian movement is

A) heat changes in liquid state

B) convectional currents

C) the impact of molecules of the dispersion medium on the colloidal particles

D) attractive forces between the colloidal particles and molecules of dispersion medium

• question_answer94) At$700K$, the equilibrium constant${{K}_{p}}$for the reaction$2S{{O}_{3}}(g)2S{{O}_{2}}(g)+{{O}_{2}}(g)$is$1.80\times {{10}^{-3}}k\,\,Pa$. What is the numerical value of${{K}_{c}}$in moles per litre for this reaction at the same temperature?

A) $3.13\times {{10}^{-7}}$

B) $3.13\times {{10}^{7}}$

C) $3.13\times {{10}^{-10}}$

D) None of these

• question_answer95) The rate of the chemical reaction doubles for an increase of $10K$ in absolute temperature from$298K$. Calculate${{E}_{a}}$

A) $52.988\,\,kJ$

B) $42.024\,\,kJ$

C) $52.898\,\,kJ$

D) $51.898\,\,kJ$

• question_answer96) Chloroprene is used in making

A) synthetic rubber

B) plastic

C) petrol

D) All of these

• question_answer97) What is the chemical formula of rust?

A) $F{{e}_{2}}{{O}_{3}}\cdot {{H}_{2}}O$

B) $F{{e}_{2}}{{O}_{3}}\cdot x{{H}_{2}}O$

C) $F{{e}_{2}}{{O}_{3}}$

D) None of the above

• question_answer98) For tetrahedral coordination, the radius ratio $({{r}^{+}}/{{r}^{-}})$should be

A) $0.155-0.225$

B) $0.225-0.414$

C) $0.414-0.732$

D) $0.732-1$

• question_answer99) Thermodynamically the most stable form of carbon is

A) diamond

B) graphite

C) peat

D) coal

• question_answer100) In the following reaction, A and B, respectively are$A\xrightarrow{HBr}{{C}_{2}}{{H}_{5}}Br\xrightarrow{B}A$

A) ${{C}_{2}}{{H}_{4}},\,\,alc.KOH/\Delta$

B) ${{C}_{2}}{{H}_{5}}Cl,\,\,aq.KOH/\Delta$

C) $C{{H}_{3}}OH,\,\,aq.KOH/\Delta$

D) ${{C}_{2}}{{H}_{2}},\,\,PB{{r}_{3}}$

• question_answer101) Which of the following is the contractile protein of a muscle?

A) Tubulin

B) Myosin

C) Tropo myosin

D) All of these

• question_answer102) The formation of multi valents at meiosis in diploid organism is due to

A) mono so my

B) inversion

C) deletion

D) reciprocal translocation

• question_answer103) In mammals, histamine is secreted by

A) fibroblasts

B) histocytes

C) lymphocytes

D) mast cells

• question_answer104) Which of the microorganisms is used for production of citric acid in industries?

A) Lactobacillus vulgaris

B) Pencillium citrinum

C) Aspergillus niger

D) Rhizopus nigricans

• question_answer105) Yeast (Saccharomyces cerevisiae) is used for the industrial production of

A) butanal

B) citric acid

C) tetracycline

D) ethanol

• question_answer106) The layer of cells that secrete enamel of tooth is

A) dentoblast

B) ameloblast

C) osteoblast

D) odontoblast

• question_answer107) Which important greenhouse gas, other than carbon dioxide, is being produced from the agricultural fields?

A) Arsine

B) Sulphur dioxide

C) Ammonia

D) Nitrous oxide

• question_answer108) The role of double fertilisation in angiosperms is to produce

A) endosperm

B) integuments

C) cotyledons

D) endocarp

• question_answer109) The exchange of gases in the alveoli of the lungs takes place by

A) osmosis

B) simple diffusion

C) passive transport

D) active transport

• question_answer110) A plant hormone used for inducing morphogenesis in plant tissue culture is

A) abscisic acid

B) gibberellins

C) cytokinins

D) ethylene

• question_answer111) Which of the following is non-symbiotic biofertilizer?

A) VAM

B) Azotobacter

C) Anabaena

D) Rhizobium

• question_answer112) Carbon monoxide is a pollutant because it

A) reacts with oxygen

B) inhibits glycolysis

C) reacts with haemoglobin

D) makes nervous system inactive

• question_answer113) If there was no carbon dioxide in the earths atmosphere, the temperature of earths surface would be

A) same as present

B) less than the present

C) higher than the present

D) dependent on the amount of oxygen in the atmosphere

• question_answer114) Total number of bones in the hindlimb of a man is

A) 14

B) 21

C) 24

D) 30

• question_answer115) When a single gene influences more than one trait, it is called

A) pleiotropy

B) epistasis

C) pseudo dominance

D) None of these

• question_answer116) Calcitonin is a thyroid hormone which

A) elevates potassium level in blood

B) lowers calcium level in blood

C) elevates calcium level in blood

D) has no effect on calcium

• question_answer117) A condition of failure of kidney to form urine is called

A) deamination

B) entropy

C) anuria

D) None of these

• question_answer118) Ulothrix can be described as a

A) filamentous alga with flagellated reproductive stages

B) non-motile colonial alga lacking zoospores

C) filamentous alga lacking flagellated reproductive stages

D) membranous alga producing zoospores

• question_answer119) The long bones are hollow and connected by air passage. They are the characteristics of

A) Aves

B) mammals

C) Reptilia

D) land vertebrates

• question_answer120) Botulism caused by Clostridium botulinum affects the

A) spleen

B) intestine

C) lymph glands

D) neuromuscular junction

• question_answer121) Cellulose, the most important constituent of plant cell wall is made up of

A) branched chain of glucose molecules linked by`$\alpha ,\,\,1,\,\,6-$glycosidic bond at the site of branching

B) unbranched chain of glucose molecules linked by $\alpha ,\,\,1,\,\,4-$glycosidic bond

C) branched chain of glucose molecules linked by $\beta ,\,\,1,\,\,4-$glycosidic bond in straight chain and $\alpha ,\,\,1,\,\,6-$glycosidic bond at the site of branching

D) unbranched chain of glucose molecules linked by $\beta ,\,\,1,\,\,4-$glycosidic bond

• question_answer122) How many genome types are present in a typical green plants cell?

A) Two

B) Three

C) More than five

D) More than ten

• question_answer123) Bryophytes are dependent on water because

A) archegonium has to remain filled with water for fertilization

B) water is essential for fertilisation for their homos porous nature

C) water is essential for their vegetative propagation

D) the sperms can easily reach upto egg in the archegonium

• question_answer124) The main role of bacteria in the carbon cycle involves

A) photosynthesis

B) assimilation of nitrogenous compounds

C) chemosynthesis

D) digestion or breakdown of organic compounds

• question_answer125) Farmers have reported over 50% higher yields of rice by using which of the following biofertiliser?

A) Mycorrhiza

B) Azolla pinnata

C) Cyanobacteria

D) Legume-Rhizobium symbiosis

• question_answer126) Species restricted to a given area are called

A) sibling

B) endemic

C) sympatric

D) allopatric

• question_answer127) Solenocytes are the main excretory structures in

A) annelids

B) molluscs

C) echinodermates

D) Platyhelminthes

A) uredia and pycnia on barberry leaves

B) uredia and aecia on wheat leaves

C) uredia and telia on wheat leaves

D) uredia and aecia on barberry leaves

• question_answer129) In a terrestial ecosystem such as forest, maximum energy is in which trophic level?

A) ${{T}_{1}}$

B) ${{T}_{2}}$

C) ${{T}_{3}}$

D) ${{T}_{4}}$

• question_answer130) The DNA of E. coli is

A) single-stranded and linear

B) single-stranded and circular

C) double-stranded and linear

D) double-stranded and circular

• question_answer131) In the five kingdom system of classification, which single kingdom out of the following can include blue-green algae, nitrogen-fixing bacteria and methangonic archaebacteria?

A) Monera

B) Fungi

C) Plantae

D) Protista

• question_answer132) A woman with two genes (one on each X-chromosome) for haemophilia and one gene for colour blindness on the X-chromosomes marries a normal man. How will the progeny be?

A) All sons and daughters haemophilic and colourblind

B) Haemophilic and colourblind daughters

C) 50% haemophilic colourblind sons and 50% haemophilic sons

D) 50% haemophilic daughters and 50% colour blind daughters

• question_answer133) The response of different organisms to the environmental rhythms of light and darkness is called

A) phototaxis

B) phototropism

C) vernalisation

D) photo periodism

• question_answer134) The functional unit of contractile system in striated muscle is

A) cross bridge

B) myofibril

C) sarcomere

D) $Z-$band

A) gastrin

B) secretin

C) cholecystokinin

D) enter gastrone

• question_answer136) Typhoid fever is caused by

A) Giardia

B) Salmonella

C) Shigella

D) Escherichia

• question_answer137) Microtubule is involved in the

A) cell division

B) DNA recognition

C) muscle contraction

D) membrane architecture

• question_answer138) The diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos islands, as observed by Darwin, provides evidence for

A) origin of species by natural selection

B) intraspecific variations

C) intraspecific competition

D) interspecific competition

• question_answer139) The most important component of the oral contraceptive pills is

A) progesterone

B) growth hormone

C) thyroxine

D) luteinising hormone

• question_answer140) Genes that are involved in turning on or off the transcription of a set structural genes are called

A) polymorphic genes

B) operator genes

C) redundant genes

D) regulatory genes

• question_answer141) Which one of the following statements about cytochrome${{P}_{450}}$is wrong?

A) It has an important role in metabolism

B) It contains iron

C) It is a coloured cell

D) It is an enzyme involved in oxidation reactions

• question_answer142) Lactose is composed of

A) glucose and fructose

B) glucose and glucose

C) glucose and galactose

D) fructose and galactose

• question_answer143) Human immunodeficiency virus $(HIV)$ has a protein coat and a genetic material which is

A) single-stranded DNA

B) single-stranded RNA

C) double-stranded RNA

D) double-stranded DNA

• question_answer144) The book Genera Plantarum was written by

A) Hutchinson

B) Bessey

C) Engler and Pranti

D) Bentham and Hooker

• question_answer145) In which of the following would you place the plants having vascular tissue lacking seeds?

A) Gymnosperms

B) Algae

C) Pteridophytes

D) Bryophytes

• question_answer146) Sympathetic nervous system induces

A) heartbeat

B) secretion of digestive juice

C) Secretion of saliva

D) All of the above

• question_answer147) The middle piece of the sperm contains

A) proteins

B) centriole

C) nucleus

D) mitochondria

• question_answer148) The respiratory centres which control inspiration and expiration are located in

A) spinal cord

B) diencephalon

C) cerebellum

D) medulla oblongata

• question_answer149) The proteins are synthesised at

A) ribosomes

B) mitochondria

C) centrosomes

D) Golgi bodies

• question_answer150) The term aquaculture means

A) aspergillosis

B) inland fisheries

C) marine fisheries

D) Both (b) and (c)

• question_answer151) Which part of the world has high density of organisms?

A) Deciduous forests

B) Grasslands

C) Savannas

D) Tropical rainforests

• question_answer152) Tablets to prevent contraception contain

A) progesterone

B) FSH

C) LH

D) Both (b) and (c)

• question_answer153) A system of classification in which a large number of traits are considered is

A) phylogenetic system

B) artificial system

C) natural system

D) synthetic system

• question_answer154) Hybridisation between $Tt\times tt$ gives rise to the progeny of ratio

A) $1:1$

B) $1:2:1$

C) $1:2$

D) $4:1$

A) resistance developed after disease

B) increasing quantity of blood

C) resistance developed before disease

D) increasing rate of heart-beat

• question_answer156) The canal system is a characteristic feature of

A) echinoderms

B) helminthes

C) coelenterates

D) sponges

A) product of spore formation in bacteria

B) hybrid cells resulting from myeloma cells

C) nervous cells of frog

D) only cells having oncogenes

• question_answer158) In DNA when AGCT occurs, their association is as per which of the following pair?

A) $AC-GT$

B) $AG-CT$

C) $AT-GC$

D) All of these

• question_answer159) After ovulation, Graafian follicle regresses into

A) corpus luteum

B) corpus callosum

C) corpus albicans

D) corpus artesia

• question_answer160) Which cranial nerve has the highest number of branches?

A) Facial nerve

B) Trigeminal

C) Vagus nerve

D) None of these

• question_answer161) Carbon dioxide acceptor in ${{C}_{3}}-$plants is

A) $PGA$

B) $RuDP$

C) $PEP$

D) None of these

• question_answer162) The problem due to Rh~ factor arises when the blood of two ($R{{h}^{+}}$and$R{{h}^{-}}$) mix-up

A) during pregnancy

B) through transfusion

C) in a test tube

D) Both (a) and (b)

• question_answer163) The Pneumococcus experiment proves that

A) DNA is the genetic material

B) RNA sometime controls the production of DNA and proteins

C) bacteria undergo binary fission

D) bacteria do not reproduce sexually

• question_answer164) Haemophilic man marries a normal woman. Their offsprings will be

A) all boys haemophilic

B) all normal

C) all girls haemophilic

D) all haemophilic

• question_answer165) DNA is mainly found in

A) nucleus only

B) cytoplasm only

C) nucleus and cytoplasm

D) nucleolus

• question_answer166) Which of the following is mismatched?

A) Vitamin - K - Beri-beri

B) Vitamin - D - Rickets

C) Vitamin - C - Scurvy

D) Vitamin - A - Xerophthalmia

• question_answer167) The maximum biomagnification would be in which of the following case of aquatic ecosystem?

A) Fishes

B) Phytoplanktons

C) Birds

D) Zooplanktons

• question_answer168) Some of the enzymes, which are associated in converting fats into carbohydrates are present in

A) microsomes

B) liposomes

C) Golgi bodies

D) glyoxysomes

• question_answer169) The antherozoids of Funaria are

A) mono ciliated

B) biciliated

C) multiciliated

D) aciliated

• question_answer170) Haemoglobin is a type of

A) carbohydrate

B) vitamin

C) skin pigment

D) respiratory pigment

• question_answer171) Dichotomous branching is found in

A) Marchantia

B) fern

C) liverworts

D) Funaria

• question_answer172) Photosynthetic bacteria have pigments in

A) chromoplasts

B) leucoplasts

C) chloroplasts

D) chromatophore

• question_answer173) Which is (he principal cation in the plasma of the blood?

A) Magnesium

B) Sodium

C) Potassium

D) Calcium

• question_answer174) Glucose is carried from digestive tract to liver by

A) pulmonary vein

B) hepatic portal vein

C) hepatic artery

D) None of these

• question_answer175) Edible part of litchi is

A) pericarp

B) fleshy aril

C) mesocarp

D) endosperm

• question_answer176) The joint between atlas and axis is called

A) pivot joint

B) hinge joint

D) angular joint

• question_answer177) Cholecystokinin and duocrinin are secreted by

B) thyroid gland

C) pancreas

D) intestine

• question_answer178) Net gain of ATP molecules during aerobic respiration is

A) 36 molecules

B) 60 molecules

C) 38 molecules

D) 48 molecules

• question_answer179) The type of placentation in which ovary is syncarpous, unilocular and ovules on sutures is called

A) marginal placentation

B) parietal placentation

C) axile placentation

D) superficial placentation

• question_answer180) The blood group with antibody$-a$ and antibody$-b$is

A) B

B) A

C) O

D) AB

• question_answer181) The endosperm of gymnosperms is

A) polyploid

B) haploid

C) triploid

D) diploid

• question_answer182) Rate of heartbeat is determined by

A) Purkinje fibres

B) papillary muscles

C) SA-node

D) AV-node

• question_answer183) Columella is a specialised structure found in the sporangium of

A) Spirogyra

B) Rhizopus

C) Ulothrix

D) None of these

• question_answer184) Which of the following is related to genetic engineering?

A) Mutation

B) Plasmid

C) Plastid

D) Heterosis

• question_answer185) Greenhouse effect refers to

A) production of cereals

B) cooling of earth

C) trapping of UV-rays

D) warming of earth

• question_answer186) Which of the following are homologous organs?

A) Nails of human being and claws in animals

B) Wings of bird and wings of insect

C) Wings of bird and hand of human

D) Wings of bat and cockroach

• question_answer187) The junction between the axon of one neuron and the dendrite of the next is called

A) junction point

B) a synapse

C) a joint

D) constant bridge

• question_answer188) To which of the following family do folic acid and pantothenic acid belong?

A) Vitamin$-C$

B) Vitamin$-K$

C) Vitamin$-A$

D) Vitamin$-B$complex

• question_answer189) The thickening of walls of arteries are called

A) arthritis

B) atherosclerosis

C) anaeurysm

D) Both (a) and (c)

• question_answer190) Due to which of the following organism yield of rice has been increased?

A) Anabaena

B) Bacillus polymyxa

C) Bacillus papulae

D) Sesbania

• question_answer191) The rate of photosynthesis is higher in

A) red light

B) blue light

C) green light

D) very high light

• question_answer192) The closing and opening of the leaves of Mimosa pudica is due to

A) chemonastic movement

B) ther monastic movement

C) seismonastic movement

D) hydrotropic movement

• question_answer193) Energy transfer from one trophic level to other in a food chain is

A) 20%

B) 10%

C) 2%

D) 1%

A) germs

B) carbohydrates

C) proteins

D) lipids

• question_answer195) Temperature changes in the environment affect most of the animals which are

A) homoiothermic

B) aquatic

C) poikilothermic

D) desert living

• question_answer196) The term humulin is used for

A) human insulin

B) powerful antibiotic

C) isoenzyme

D) hydrolytic enzyme

A) interstitial cells of testes

D) posterior part of thyroid

• question_answer198) The first transgenic crop was

A) cotton

B) pea

C) tobacco

D) flax

• question_answer199) The process of replication in plasmid DNA, other than initiation, is controlled by

A) mitochondrial gene

B) bacterial gene

C) plasmid gene

D) None of the above

• question_answer200) Which of the following regarded as a unit of nervous tissue?

A) Myelin sheath

B) Axons

C) Dendrites

D) Neurons