AIIMS Previous Paper 2012


200 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Previous Paper 2012


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This mock test of AIIMS Previous Paper 2012 for NEET helps you for every NEET entrance exam. This contains 200 Multiple Choice Questions for NEET AIIMS Previous Paper 2012 (mcq) to study with solutions a complete question bank. The solved questions answers in this AIIMS Previous Paper 2012 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this AIIMS Previous Paper 2012 exercise for a better result in the exam. You can find other AIIMS Previous Paper 2012 extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

If the earth stops moving around its polar axis then what will be effect on body placed at south axis?

Solution: The effect will be seen only on equator .The body weight will increase on the earth towards centre when earth rotation stops.
QUESTION: 2

Total electric flux coming out of unit positive charge put in air is :

Solution:
QUESTION: 3

A rod AB is l m long. The temperature of its one end A is maintained at 100’C and other end Bat 10°C, the temperature at a distance of 60 cm from point B is

Solution: KA(100-t)=kA(t-10) solve it & u will get t=64 digree centigrade.
QUESTION: 4

In designing, a beam for its use to support a load. The depression at centre is proportional to (where, Y is Young’s modulus)

Solution:
QUESTION: 5

 A balloon is filled at 27°C and latm pressure by 500 m’ lie. At -3°C and 0.5 atm pressure, the volume of lie will be

Solution:
QUESTION: 6

The particle of mass 50 kg is at rest. The work done to accelerates it by 20 m/s in 10 s is

Solution:
QUESTION: 7

The moment of inertia of a circular loop of radius R. at a distance of R / 2 around a rotating axis parallel to horizontal diameter of loop is

Solution:
QUESTION: 8

The ratio of radius of two bubbles is 2: 1. What is the ratio excess pressure inside them?

Solution:
QUESTION: 9

In the capacitor of capacitance C, charge Q and energy W is stored. If charge is increased upto 2Q, the energy stored will be

Solution:
QUESTION: 10

The unit of thermal conductivity is

Solution:
QUESTION: 11

Photon and electron are given same energy (10-20 J) Wavelength associated with photon statement will he and electron are λp and λe the correct

Solution:
QUESTION: 12

The half-life of radioactive element is 600 yr. The fraction of sample that would remain after 3000 yr is

Solution:
QUESTION: 13

A particle moves along with x-axis. The position x of particle with respect to time r from origin given by x = b0 + b1t + b2t2. The acceleration of particle is

Solution:
QUESTION: 14

Root mean square speed of the molecules of ideal gas is v. If pressure is increased two times at constant temperature, then the rms speed will become

Solution:
QUESTION: 15

1 mole of gas occupies a volume of 200 mL at 100 mm pressure. What is the volume occupied by two moles of gas at 400 mm pressure and at same temperature?

Solution:

equation 1:
PV= n RT
value of RT = PV/n
RT= 100×200/1 = 20000 .........(1)

equation 2:
PV = nRT
value of RT= PV/n
RT = 400×V/2 = 200V .........(2)


as both R And T are constant
we can equate both the equations

we get,
200V=20000
V= 100 ml

QUESTION: 16

A charged particle travels along a straight line with a speed v in a region where both electric field E and magnetic field B are present. it follows that

Solution:
QUESTION: 17

What will be the wave velocity, if the radar gives 54 waves/min and wavelength of the given wave is 10 m?

Solution:
QUESTION: 18

A transformer of 100% efficiency has 200 turns in the primary coil and 40000 rums in secondary coil. It is connected to a 220 V main supply and secondary feeds to a 100 kfl resistance. The potential difference per turn is

Solution:
QUESTION: 19

A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens is completely immersed in a liquid of refractive index 1.6, us focal length will be

Solution:
QUESTION: 20

SI unit of permittivity is

Solution:
QUESTION: 21

A spherical drop of capacitance 1 μF is broken into eight drops of equal radius. Then, the capacitance of each small drop is

Solution:
QUESTION: 22

A simple harmonic oscillator consists of a panicle of mass in and an ideal spring with spring constant k. The particle oscillates with a time period T. The spring is cut into two equal parts. If one part oscillates with the same particle, the time period will be

Solution:
QUESTION: 23

The coefficient of viscosity for hot air is

Solution:
QUESTION: 24

An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy E0. Its potential energy is

Solution:
QUESTION: 25

A thin hollow sphere of mass m is completely filled with a liquid of mass rn. When the sphere rolls with a velocity v, kinetic energy of the system is (neglect friction)

Solution:
QUESTION: 26

A non-conducting body floats in a liquid at 20°C with 2/3 of its volume immersed in the liquid. When liquid temperature is increased to 100°C, 3 of body’s volume is immersed in the liquid. Then the coefficient of real expansion of the liquid is (neglecting the expansion of container of the liquid)

Solution:
QUESTION: 27

Two slabs A and B of different materials but of the same thickness are joined end to end to form a composite slab. The thermal conductivities of A and B are K1 and K2 respectively. A steady temperature difference of 12°C is maintained across the composite slab. If K1 = K2 / 2 the temperature difference across slabs A is

Solution: K×∆t =constant let k1 = 1 &k2= 2 then 1(12-t)=2(t-0) t=4 then ∆t across A is 12-4=8Degree C.
QUESTION: 28

In short wave communication waves of which of following frequencies will be reflected back by the ionospheric layer having electron density 1011 per m3?

Solution:
QUESTION: 29

A body of mass 4 kg moving with velocity 12 m/s collides with another body of mass 6 kg at rest. If two bodies stick together after collision, then the loss of kinetic energy of system is

Solution:
QUESTION: 30

A marble block of mass 2 kg lying on ice when given a velocity of 6 m/s is stopped by friction in 10 s. Then the coefficient offriction is

Solution:
QUESTION: 31

A body of mass 0.25 kg is projected with muzzle velocity 100 m/s from a tank of mass 100 kg. What is the recoil velocity of the tank?

Solution:
QUESTION: 32

A rocket with a lift-off mass 3.5 x 104 kg is blast upward with an initial acceleration of 10 m/s2. Then, the initial thrust of the blast is

Solution:
QUESTION: 33

A step down transformer is used on a 1000 V line to deliver 20 A at 120 Vat the secondary coil. If the efficiency of the transformer is 80%, the current drawn from the line is

Solution:
QUESTION: 34

What kV potential is to be applied on X-ray tube so that minimum wavelength of emitted X-rays may be 1 A (h = 6.6 x 10-34J-5)

Solution:
QUESTION: 35

Hydrogen atom excites energy level from fundamental state to n = 3. Number of spectrum lines according to Bohr is

Solution:
QUESTION: 36

A black body at a temperature of 2600 K has the wavelength corresponding to maximum emission 1200 A. Assuming the moon to be perfectly black body the temperature of the moon, if the wavelength corresponding to maximum emission is 5000 A is

Solution:
QUESTION: 37

The heat required to increase the temperature of 4 moles of a monoatomic ideal gas from 273 K to 473 K at constant volume is

Solution:
QUESTION: 38

A solid sphere rolls without slipping on the roof. The ratio of its rotational kinetic energy and its total kinetic energy is

Solution:
QUESTION: 39

6Ω and 12Ω resistors are connected in parallel. This combination is connected in series with a 10 V battery and 6Ω resistor. What is the potential difference between the terminals of the 12Ω resistor?

Solution:
QUESTION: 40

Charge passing through a conductor of cross-section area A = 0.3 m2 is given by q sa 3 t2 + St + 2 in coulomb, where t is in second. What is the value of drift velocity at t = 2 s? (Given, n = 2 x 1025 / m3)

Solution:
QUESTION: 41

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : When a body is dropped or thrown horizontally from the same height, it would reach the ground at the same time.
Reason : Horizontal velocity has no effect on the vertical direction.

Solution:
QUESTION: 42

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Two similar trains are moving along the equatorial line with the same speed but in opposite direction. They will exert equal pressure on the rails.
Reason : In uniform circular motion the magnitude of acceleration remains constant but the direction continuously changes.

Solution:
QUESTION: 43

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : A table cloth can he pulled from a table without disloading the dishes.
Reason : To every action there is an equal and opposite reaction.

Solution:
QUESTION: 44

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Soft steel can be made red hot by continued hammering on it, but hard steel cannot.
Reason : Energy transfer in case of soft is large as in hard steel.

Solution:
QUESTION: 45

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : The centre of mass of an electron and proton, when released moves faster towards proton.
Reason : Proton is heavier than electron.

Solution:
QUESTION: 46

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : A planet moves faster, when it is closer to the sun in its orbit and vice versa.
Reason : Orbital velocity in orbit of planet is constant.

Solution:
QUESTION: 47

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : A large force is required to drawn apart normally two glass plates enclosing a thin water film.
Reason : Water works as glue and sticks two glass plates.

Solution:
QUESTION: 48

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : The water rises higher in a capillary tube of small diameter than in the capillary tube of large diameter.
Reason : Height through which liquid rise in capillary tube inversely proportional to the capillary tube.

Solution:
QUESTION: 49

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : If the bob of a simple pendulum is kept in a horizontal electric field, its period of oscillation will remain same.
Reason : If bob is charged and kept in horizontal electric field, then the time period will be decreased.

Solution:
QUESTION: 50

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : A thermoelectric refrigerator is based on the Peltier effect.
Reason : A thermocouple may be used as a radiation detector.

Solution:
QUESTION: 51

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : The pattern and position of fringes always remain same even after the introduction of transparent medium in a path of one of the slit.
Reason : The central fringe is bright or dark depends upon the initial phase difference between the two coherence sources.

Solution:
QUESTION: 52

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Balmer senes lies in the visible region of electromagnetic spectrum.
Reason : 1/λ = R (1 / 22 – 1 / n2) where, n = 3.4, 5…

Solution:
QUESTION: 53

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Corpuscular theory fails in explaining the velocities of light in air and water.
Reason : According to corpuscular theory, light should travel faster in denser media than in rarer media.

Solution:
QUESTION: 54

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Susceptibility is defined as the ratio of intensity of magnetisation I to magnetic intensity H.
Reason : Greater the value of susceptibility smaller the value of intensity of magnetisation I.

Solution:
QUESTION: 55

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : It is nor possible to have interference between the waves produced by two violins.
Reason : For interference of two waves the phase difference between the waves must remain constant.

Solution:
QUESTION: 56

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : A metallic shield in the form of a hollow shell may be build to block an electric field.
Reason : In a hollow spherical shield. the electric field inside it is zero at every point.

Solution:
QUESTION: 57

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : The molecules of a monoatomic gas has three degrees of freedom.
Reason : The molecules of a diatomic gas has five degrees of freedom.

Solution:
QUESTION: 58

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : To observe diffraction of light the size of obstacle/aperture should be of the order of 10-7 m.
Reason : 10-7m is the order of wavelength of visible light.

Solution:
QUESTION: 59

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : The resolving power of a telescope is more if the diameter of the objective lens is more.
Reason : Objective lens of large diameter collects more light.

Solution:
QUESTION: 60

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : A beam of charged particles is employed in the treatment of cancer.
Reason : Charged panicles on passing through a material medium loss their energy by causing ionisation of the atoms along their path.

Solution:
QUESTION: 61

Which one of the following enzymes is present in animals like cow, buffaloes etc., to digest compounds like paper, cloth etc?

Solution:
QUESTION: 62

Which one of the following is employed as antihistamine?

Solution:
QUESTION: 63

Dunston’s test is used for identification of

Solution:
QUESTION: 64

Which one of the following structures represents the neoprene polymer?

Solution:
QUESTION: 65

Etherates are

Solution:
QUESTION: 66

IC electricity deposits

Solution:
QUESTION: 67

The reduction potential at pH = 14 for the Cue2+/Cu couples is [Given, E°Cu2+/Cu = 0.34V; Ksp Cu(OH)2 = 1 x 10-19

Solution:
QUESTION: 68

Freon used as refrigerant is

Solution:
QUESTION: 69

Of the following, the oxime of which shows geometrical isomerism is

Solution:
QUESTION: 70

Which has the highest nucleophilicity?

Solution:
QUESTION: 71

What is the correct relationship between the pHs of isoinolar solutions of sodium oxide (PH1), sodium sulphide (pH2), sodium selenide (pH3) and sodium telluride (pH4)?

Solution:
QUESTION: 72

The vapour pressure of two liquids P and Q are 80 and 60 tort respectively. The total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be

Solution:
QUESTION: 73

Which one of the following compounds is most acidic?

Solution: B is the right answere because there is -No2 group attached on the benzene ring which is an electron withdrawing group and so -I effect increase thus acidity increases.
QUESTION: 74

A reaction occurs spontaneously if

Solution:
QUESTION: 75

The aqueous solution containing which one of the following ions will be colourless? (Atomic number of Sc = 21, Fe = 26, Ti = 22. Mn = 25)

Solution:
QUESTION: 76

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?

Solution:
QUESTION: 77

Which one of the following alkenes will react faster with 1-12 under catalytic hydrogenation conditions?

Solution:
QUESTION: 78

For a first order reaction A → B, the reaction rate at reactant concentration of 0.01 M is found to be 2.0 x 10-5 mol L-1s-1. The half-life period of the reaction is

Solution:
QUESTION: 79

Which one of the following is the electron deficiens molecule?

Solution:
QUESTION: 80

Which one of the following would have a permanent dipole moment?

Solution: The dipole moment of all the molecules except SF4cancel with each other as the dipole moment of the bonds in the molecule are directed in opposite directions. Of sulfur's total of six valence electrons, two form a lone pair. The structure of SF4 anticipated using the VSEPR theory is a see-saw shape, with S at the center. One of the three equatorial positions is occupied by a non-bonding lone pair of electrons. The molecule has two distinct types of F ligands, two axial and two equatorial. Due to the presence of lone pair and un-equal S-F bonds, SF4 is a polar molecule.
QUESTION: 81

Which one of the following undergoes nucleophilic substitution exclusively by SN I mechanism?

Solution:
QUESTION: 82

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

Solution:
QUESTION: 83

In a face centred cubic lattice, a unit cell is shared equally by how many unit cells?

Solution:
QUESTION: 84

A solution of urea (mol. mass 56 g mol-l) boils at 100.18°C at the atmospheric pressure

If Kf and Kb for water are 1.86 and 0.52 K kg mol-1 respectively, the above solution will freeze at

Solution:
QUESTION: 85

Which one of the following is an inner orbital complex as well as diamagnetic in behaviour? (Atomic number of Zn = 30, Cr = 24, CO = 27, Ni = 28)

Solution:
QUESTION: 86

Electrolytic reduction of nitrobenzene in weakly acidic medium gives

Solution:
QUESTION: 87

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

Solution:
QUESTION: 88

The correct order of acid strength is

Solution:
QUESTION: 89

In the equation.

Identify the metal M.

Solution:
QUESTION: 90

The decomposition of a certain mass of CaCO3 gave 11.2 dm3 of CO2 gas at STP. The mass of KOH required to completely neutralise the gas is

Solution:
QUESTION: 91

Calculate the wavelength of light required to break the bond between two chlorine atoms in a chlorine molecule. The CI—CI bond energy is 243 kJ mol-1(h = 6.6 x 10-34 Js; c = 3 x 108 ms-1, Avogadro’s number = 6.02 x 10-23mole-1)

Solution:
QUESTION: 92

The pressure and temperature of 4 dm3 of carbon dioxide gas are doubled. Then volume of carbon dioxide would be

Solution:
QUESTION: 93

Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the H+ ion concentration in the mixture?​

Solution:
QUESTION: 94

Purple of Cassius is a/an

Solution:
QUESTION: 95

Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories?

Solution:
QUESTION: 96

Which base is present in RNA but nor in DNA?

Solution:
QUESTION: 97

Which one of the following methods is neither meant (or the synthesis nor for the separation of amines?

Solution:
QUESTION: 98

The reaction of chloroform with alcoholic KOH and p-toluicline form

Solution:
QUESTION: 99

Pyruvic acid is obtained by

Solution:
QUESTION: 100

Rate of the reaction,

is fastest when Z is

Solution:
QUESTION: 101

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Mercury vapour is shining silvery appearance.
Reason : Mercury is a metal with shining silvery appearance.

Solution:
QUESTION: 102

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : F2 has high reactivity.
Reason : F — F bond has low bond dissociation enthalpy.

Solution:
QUESTION: 103

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : BF3 molecule is planar but NF3 is pyramidal.
Reason : N atom is smaller than B.

Solution:
QUESTION: 104

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : The free gaseous Cr atom has six unpaired electrons.
Reason : Half-filled s-orbital has greater stability.

Solution:
QUESTION: 105

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Meniscus of a liquid disappears at critical temperature.
Reason : Density of a liquid and its gaseous phase become equal at the critical temperature.

Solution:
QUESTION: 106

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Molar entropy of vaporisation of water is different from ethanol.
Reason : Water is more polar than ethanol.

Solution:
QUESTION: 107

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : For the reaction ;


Reason : Equilibriuam constant, 

Solution:
QUESTION: 108

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Small quantity of soap is used to prepare a stable emulsion.
Reason : Soap lowers the interfacial tension between oil and water. 

Solution:
QUESTION: 109

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Both o-hydroxy benzaldehyde and p-hydroxy benzaldehyde have same molecular weight and show H-bonding.
Reason : Melting point of p-hydroxy benzaldehyde is more.

Solution:
QUESTION: 110

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Precipitation of soap is made by the addition of salt (NaCI).
Reason : Presence of common ion suppresses the dissociation of weak acid.

Solution:
QUESTION: 111

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : van-Arkel method is used prepare samples of some metals.
Reason : It involves reaction of CO with metals to form volatile carbonyls which decompose on heating to give pure metal.

Solution:
QUESTION: 112

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : EDTA is a hexadentate ligand.
Reason : Denucity of a ligand is given by number of lone pairs donated to central atom by a ligand.

Solution:
QUESTION: 113

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Sodium carbonate extract of a salt containing sulphide ions gives a violet colour with appropriate reagent.
Reason : The reagent sodium nitroprusside gives violet colour due to the formation of sodium thionitroprusside.

Solution:
QUESTION: 114

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : H2O2 under goes disproportionation on heating.
Reason : It gives H2O and O2 on heating.

Solution:
QUESTION: 115

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : 1E1 of nitrogen is lower than ICE of oxygen.
Reason : Across a period affective nuclear charges decreases.

Solution:
QUESTION: 116

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : The term anomers of glucose refers to isomers of glucose that differ in configuration at carbon one (C – I).
Reason : Anomers of glucose are cyclic diastereomers differ in configuration at C -1 existing in two forms α-and β-respectively.

Solution:
QUESTION: 117

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : The presence of nitro group facilitates nucleophilic substitution reactions in aryl halides.
Reason : The intermediate carbanion is stabilised due to the presence of nitro group.

Solution:
QUESTION: 118

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Alkyl benzene is not prepared by Friedel-Craft’s alkylation of benzene.
Reason : Alkyl halides are less reactive than acyl halides.

Solution:
QUESTION: 119

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Benzyl bromide when kept in acetone water produces benzyl alcohol.
Reason : The reaction follows SN2 mechanism.

Solution:
QUESTION: 120

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Isobutanal does not give iodoform test.
Reason : It does not have a α hydrogen.

Solution:
QUESTION: 121

Energy flow in an ecosystem is​

Solution:
QUESTION: 122

Who proposed a five-kingdom classification and named kingdoms as Monera, Prorista. Fungi, Plantae and Animalia?

Solution:
QUESTION: 123

Which of the following organisms completely lack cell wall, they are the smallest living cells known and can survive without oxygen?

Solution: Acc to ncert mycoplasma can survive without o2 kingdom Monera.
QUESTION: 124

What is the correct order of the stages of cellular respiration?

Solution:
QUESTION: 125

A mixture containing DNA fragments, a, b, c and d, with molecular weights of a b c. a > b and d > c, was subjected to agarose gel electrophoresis. The positions of these fragments from cathode to anode sides of the gel would be

Solution:
QUESTION: 126

Which of the following DNA sequences qualifies to be designated as a palindrome?

Solution:

DNA is considered a antiparallel molecule because in this molecule all base pair are sequences in palindrome. when a sequence we are read then first to last and last to first then find same word sequence this is called palindrome... for general example kanak madam etc and in DNA 5'-AGCGCT-3'. 3'-TCGCGA-5' this sequence is important for make transgenic organism.

QUESTION: 127

IUCN stands for

Solution:
QUESTION: 128

Tendrils in plants are an example of

Solution:
QUESTION: 129

Haemoglobin is

Solution:
QUESTION: 130

Stomatal opening is affected by

Solution:
QUESTION: 131

Taxonomic hierarchy refers to

Solution:
QUESTION: 132

Which of the following induces parturition?

Solution:
QUESTION: 133

Excess carbohydrates and proteins are stored in the body as

Solution:
QUESTION: 134

 Both sickle cell anaemia and Huntington’s chorea are

Solution:
QUESTION: 135

Which one of the following pairs is not correctly matched?

Solution:
QUESTION: 136

The exchange of segments of non-sister chromatids between chromosomes of a homologous pair termed as

Solution:
QUESTION: 137

Okazaki is known for his contribution to the understanding of

Solution:
QUESTION: 138

The beginning of understanding genetic transformation in bacteria was made by

Solution:
QUESTION: 139

The source of taq polymerase used in PCR is a

Solution:
QUESTION: 140

A pea plant parent having violet-coloured flowers with unknown genotype was crossed with a plant having white-coloured flowers. In the progeny, 5O% of the flowers were violet and 50% were white. The genotypic constitution of the parent having violet-coloured flowers was

Solution: It's answer is c because if u are getting 50-50% violet and white flowers and one of the paernts is recessive, then the other must have both types of alleles, i. e., dominant as well as recessive, so the violet colored parent must be in heterozygous form.
QUESTION: 141

 If the total amount of adenine and thyrnine in a double-stranded DNA is 45%, the amount of guznine in this DNA will be

Solution: We know that A+T = G+C. so if adenine and thymine are 45% then most probably G+C will be 55% . also in that G will be half after making half of 55% we will get 27.5% 
QUESTION: 142

Typhoid fever is caused by a species of

Solution:
QUESTION: 143

HIV is a member of a group of viruses called

Solution: It's bcoz in all organism even all viruses are store their genetic material in form of DNA but in case of HIV virus it has genetic material as RNA so it belongs to retrovirus.
QUESTION: 144

The number of linkage group(s) present in Escherichia Coli is

Solution:
QUESTION: 145

Natural cytokinins are sythesized in tissue that are

Solution:
QUESTION: 146

Resemblance of one organism to another for protection and hiding is

Solution:
QUESTION: 147

Spirochaetes is are

Solution:
QUESTION: 148

The metachromatic granules are

Solution:
QUESTION: 149

Clamp connection is found In

Solution:
QUESTION: 150

AUG codes for

Solution:
QUESTION: 151

Fluid mosaic model of plasma membrane was given by

Solution:
QUESTION: 152

Cell respiration is carried out by

Solution:
QUESTION: 153

In the lacoperon model, lactose molecules function as

Solution:
QUESTION: 154

A recessive mutant is one which is

Solution:
QUESTION: 155

Humoral immunity system is mediated by

Solution:
QUESTION: 156

It two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, 75% of the flowers are red and 25% are white. The genotypic constitution of the parents having red coloured flowers will be

Solution:
QUESTION: 157

If the total amount of adenine and thymine in a double•stranded DNA is 60%, the amount of guanine in this DNA will be

Solution: Yes correct because of in DNA base pair arrange in complementary sequence for example A=T and G=_C then mentioned in question 60% AT 40% GC and when we are solve it then answer will be 20%
QUESTION: 158

The protein products of the following Bt toxin genes cry I Ac and cry II Ab areresponsible for controlling

Solution:
QUESTION: 159

In a flowering plant, the pollen tube first arrives in

Solution:
The correct option is C.
In flowering plants, the pollen tube first arrives in synergids. The pollen tube coming from the micropyle is first interacts with synergids and then to the egg cell in between the two synergids.
QUESTION: 160

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Only a single functional female gamete is formed from each primary oocyte cell.
Reason : Meiosis in each primary as oocyte gives rise to only one cell, which function ovum.

Solution:
QUESTION: 161

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Cytochrome oxidase enzyme contain copper,
Reason : Cyanide combines with the copper of cytochrome oxidase and prevents O2combining with it.

Solution:
QUESTION: 162

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Recognition site should be preferably single and responsive to commonly used restriction enzyme.
Reason : In pBR322 alien DNA is ligated generally in the area of Barn HI site of tetracyline resistance gene.

Solution:
QUESTION: 163

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Generally, a woman do nor conceive during lactation period.
Reason  : The hormone prolacrin initiates and maintain lactation in a woman.

Solution:
QUESTION: 164

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Allelopathy is a form of ammensalism that occurs in plants.
Reason : Association of rooting plants with fungal hyphae is an important example ammensalism.

Solution:
QUESTION: 165

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Bats and whales are classified as mammals.
Reason : Bats and whales have four chambered heart.

Solution: Presence of mammary glands is the strong identification of mammals. since all mammals and birds also have 4 chambered heart so option B is correct.
QUESTION: 166

These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of of following responses.
Assertion : Histamine is related with allergic and inflammatory reactions.
Reason : Histamine is a vasodilator.