Biology
1. Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone 2. The major role of minor elements inside living organisms is to act as 3. Which one of the following is wrong in relation to photorespiration? 4. Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants? 5. In sugarcane plant 14CO2 is fixed to malic acid, in which the enzyme that fixes CO2 is 6. Stomata of CAM plants 7. Which element is located at the centre of the porphyrin ring in chlorophyll? 8. Which one of the following concerns photophosphorylation? 9. In alcohol fermentation 10. In which one of the following do the two names refer to one and same thing? 11. Juicy hair-like structures observed in the lemon fruit develop from 12. Nicotiana sylvestris flowers only during long days and N.tabacum flowers only during short days. If raised in the labora 13. Differentiation of shoot is controlled by 14. Bundle of His is a network of 15. The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be gr 16. In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the individual would 17. If Henle's loop were absent from mammalian nephron, which one of the following is to be expected? 18. What used to be described as Nissl's granules in a nerve cell are now identified as 19. Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency? 20. In a flowering plant, archesporium gives rise to 21. Which one of the following pairs of plants are not seed producers? 22. Species are considered as 23. Biosystematics aims at 24. Phenetic classification of organisms is based on 25. Chromosomes in a bactertial cell can be 1 $$-$$ 3 in number and 26. Tobacco mosaic virus is a tubular filament of size 27. Which one of the following statements about viruses is correct? 28. Viruses are no more ''alive'' than isolated chromosomes because 29. In which kingdom would you classify the archaea and nitrogen-fixing organisms, if the five-kingdom system of classificat 30. During embryonic development, the establishment
of polarity along anterior/posterior, dorsal/ventral
or medial/lateral a 31. Sexual reproduction in Spirogyra is an advanced feature because it shows 32. Plants reproducing by spores such as mosses and ferns are grouped under the general term 33. Which one pair of examples will correctly represent the grouping spermatophyta according to one of the schemes of classi 34. Bartholin's glands are situated 35. The chief advantage of encystment of an Amoeba is 36. Systemic heart refers to 37. During the life-cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following l 38. Sycon belongs to a group of animals, which are best described as 39. Ommatidia serve the purpose of photoreception in 40. Which one of the following is a matching pair of an animal and a certain phenomenon it exhibits? 41. Given below are four matchings of an animal and its kind of respiratory organ :
(A) Silver fish & 42. Which endangered animal is the source of the
world's finest, lightest, warmest and most
expensive wool - the shahtoosh ? 43. Carcinoma refers to : - 44. Short-lived immunity acquired from mother to
foetus across placenta or through mother's milk
to the infant is categorise 45. Christmas disease is another name for : - 46. Which of the following plants are used as green
manure in crop fields and in sandy soils ? 47. Maximum application of animal cell culture
technology today is in the production of : - 48. During anaerobic digestion of organic waste,
such as in producing biogas, which one of the
following is left undergraded 49. In recent years, DNA sequences (nucleotide
sequence) of mt-DNA and Y chromosomes were
considered for the study of human 50. Which one of the following bacteria has found
extensive use in genetic engineering work in
plants ? 51. ELISA is used to detect viruses, wherethe key reagent is :- 52. Mycorrhiza is an example of :- 53. Which group of vertebrates comprises the
highest number of endangered species ? 54. Which one of the following describes correctly
the homologous structures ? 55. The apical meristem of the root is present 56. In which one of the following nitrogen is not a
constituent ? 57. The aleurone layer in maize grain is specially
rich in :- 58. Chlorenchyma is known to develop in the : - 59. Diffuse porous wood is characteristics of those
plants which are growing in : - 60. The cells of the quiescent centre are characterised
by : - 61. Which one of the following contains the largest
quantity of extracellular material ? 62. Cellular totipotency is demonstrated by :- 63. Coconut milk factor is 64. What would happen if in a gene encoding a
polypeptide of 50 amino acids, 25th codon
(UAU) is mutated to UAA ? 65. Test tube baby means a baby born when 66. Two opposite forces operate in the growth and
development of every population. One of them
relates to the ability to rep 67. Which one of the following traits of garden pea
studied by Mendel was a recessive feature ? 68. The genes controlling the seven pea characters
studied by Mendel are now known to be located
on how many different chrom 69. Pattern baldness, moustaches and beard in
human males are examples of : - 70. Two crosses between the same pair of genotypes
or phenotypes in which the sources of the
gametes are reversed in one cro 71. Down's syndrome is caused by an extra copy of
chromosome number 21. What percentage of
offspring produced by an affected 72. Which one of the following conditions though
harmful in itself, is also a potential saviour from
a mosquito borne infect 73. In Drosophila, the sex is determined by : - 74. During translation initiation in prokaryotes, a
GTP molecule is needed in : - 75. In the genetic code dictionary, how many
codons are used to code for all the 20 essential
amino acids : - 76. Degeneration of a genetic code is attributed to
the : - 77. During transcription, the DNA site at which
RNA polymerase binds is called :- 78. What does "lac" refer to in what we call the lac
operon ? 79. Which one of the following triplet codes, is
correctly matched with its specificity for an
amino acid in protein synthes 80. Which one of the following sequences was
proposed by Darwin and Wallace for organic
evolution ? 81. Convergent evolution is illustrated by : - 82. Random genetic drift in a population probably
results from 83. Darwin in his 'Natural Selection Theory' did not
believe in any role of which one of the following
in organic evolution 84. In a random mating population in equilibrium,
which of the following brings about a change in
gene frequency in a non-di 85. Industrial melanism is an example of : - 86. Which one of the following is categorised under
living fossils ?
Chemistry
1. The radioistope, tritium ($${}_1^3$$H) has a half-life of 12.3 years. If the initial amount of tritium is 32 mg, how man 2. Among the following which is not the $$\pi $$-bonded organometallic compound? 3. The number of unpaired electrons in the complex ion [CoF6]3$$-$$ is
(Atomic no. : Co = 27) 4. The correct order of ionic radii of Y3+, La3+, Eu3+ and Lu3+ is
(Atomic nos. Y = 39, La = 57, Eu = 63, Lu = 71) 5. In this reaction :
CH3CHO + HCN $$ \to $$ CH3CH(OH)CN
  6. When $$m$$-chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are) 7. $$A$$ and $$B$$ in the following reactions are :
8. In a set of the given reactions, acetic acid yielded a product C.
Product $$C$$ would be 9. The final product C, obtained in this reaction
would be 10. Glycolysis is 11. Vitamin B12 contains 12. Phospholipids are esters of glycerol with 13. Chargaff's rule states that in an organism 14. The e.m.f. of a Daniell cell at 298 K is E1.
When the concentration of ZnSO4 is 1.0 M and that of CuSO4 is 0.01 M, the 15. On the basis of the information available from the reaction,
4/3Al + O2 $$ \to $$ 2/3Al2O3, $$\Delta $$G = 16. The temperature dependence of rate constant (k) of a chemical reaction is written in terms of Arrhenius equation, $$k = 17. If the rate of the reaction is equal to the rate constant, the order of the reaction is 18. The reaction A $$ \to $$ B follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1 19. The activation energy for a simple chemical reaction A $$\rightleftharpoons$$ B is E$$a$$ in forward direction.
The acti 20. Which one of the following compounds is not a protonic acid? 21. Which one of the following characteristics of the transition metals is associated with their catalytic activity? 22. The basic character of the transition metal monoxides follows the order
(Atomic no's. Ti = 22, V = 23, Cr = 24, Fe = 26) 23. The equilibrium constants of the following are
N2 + 3H2 $$\rightleftharpoons$$ 2NH3; K1
N2 24. The velocity of Planck's constant is 6.63 $$ \times $$ 10$$-$$34 J s.
The velocity of light is 3.0 $$ \times $$ 108 m 25. The ions O2$$-$$, F$$-$$, Na+, Mg2+ and Al3+ are isoelectronic. Their ionic radii show 26. Which one of the following statements is not correct for sigma- and pi- bonds formed between two carbon atoms? 27. For the reaction,
C3H8(g) + 5O2(g) $$ \to $$ 3CO2(g) + 4H2O(l)
at constant temperature, $$\Delta $$H $$-$$ $$\Delt 28. The densities of graphite and diamond at 298 K are 2.25 and 3.31 g cm$$-$$3, respectively. If the standard free energy d 29. For which one of the following equations is $$\Delta $$Horeact equal to $$\Delta $$Hof for the product ? 30. Formation of solution from two components can be considered as
(i) Pure solvent $$ \to $$ separated solvent m 31. The molar heat capacity of water at constant pressure, C, is 75 J K$$-$$1 mol$$-$$1. When 1.0 kJ of heat is supplied to 32. What is the entropy change (in J K$$-$$1 mol$$-$$1) when one mole of ice is converted into water at 0oC? (The enthalpy c 33. Which one of the following statements is not true? 34. The reaction quotient (Q) for the reaction N2(g) + 3H2(g) $$\rightleftharpoons$$ 2NH3(g) is given by $$Q = {{{{\left[ 35. The solubility product of AgI at 25oC is 1.0 $$ \times $$ 10$$-$$16 mol2 L$$-$$2. The solubility of AgI in 10$$-$$4 N so 36. Name of the compound given below is
37. Which one of the following orders of acid strength is correct ? 38. The compound
on reaction with NaIO4 in the presence of KMnO4 gives 39. Which one of the following is a free-radical substitution reaction ? 40. The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I), benzene (II) and ni 41. Which of the following pairs of compounds are enantiomers? 42. The oxidation states of sulphur in the anions
SO3$${_3^{2 - }}$$, S2O$${_4^{2 - }}$$ and S2O$${_6^{2 - }}$$ follow t
Physics
1. A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal 2. Two 220 volt, 100 watt bulbs are connected first in series and then in parallel. Each time the combination is connected 3. An electric kettle has two heating coils. When one of the coils is connected to an a.c. source, the water in the kettle 4. Fuse wire is a wire of 5. In a Wheatstone's bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R, 6. A charged particle moves through a magnetic field in a firection perpendicular to it. Then the 7. A long solenoid carrying a current producess a magnetic field B along its axis. If the current is doubled and the number 8. A diamagnetic material in a magnetic field moves 9. According to Curie's law, the magnetic susceptibility of a substance at an absolute temperature $$T$$ is proportional to 10. A bar magnet is oscillating in the Earth's magnetic field with a period T. What happens to its period and motion if its 11. We consider the radiation emitted by the human body. Which one of the following statements is true? 12. Which of the following rays are not electromagnetic waves ? 13. An equiconvex lens is cut into two halves along (i) XOX' and (ii) YOY' as shown in the figure. Let $$f,f',$$ $$f''$$ 14. A charge q is located at the centre of a cube. The electric flux through any face is 15. J.J. Thomson's cathode-ray tube experiment demonstrated that 16. A photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted to 2 m then 17. An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The Coulomb force $$\overrig 18. Solar energy is mainly caused due to 19. The volume occupied by an atom is greater than the volume of the nucleus by a factor of about 20. The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of $${}_2^4$$ 21. In which of the following systems will the radius of the first orbit (n = 1) be minimum ? 22. Reverse bias applied to a junction diode 23. Two spheres of masses m and M are situated in air and the gravitational force between them is F. The space around the ma 24. If a ball is thrown vertically upwards with speed u, the distance covered during the last t seconds of its ascent is 25. The vector sum of two forces is perpendicular to their vector differences. In that case, the forces 26. A particle moves along a circle of radius $$\left( {{{20} \over \pi }} \right)$$ m with constants tangential acceleratio 27. A man weight 80 kg. He stands on a weighting scale in a lift which is moving upwards with a uniform acceleration of 5 m 28. A monkey of mass 20 kg is holding a vertical rope. The rope will not break when a mass of 25 kg is suspended from it bu 29. When a long spring is stretched by 2 cm, its potential energy is U. If the spring is stretched by 10 cm, the potential e 30. A stationary particle explodes into two particles of masses m1 and m2 which move in opposite directions with velocities 31. A ball rolls without slipping. The radius of gyration of the ball about an axis passing through its centre of mass is K. 32. A stone is tied to a string of length $$l$$ and is whirled in a vertical circle with the other end of the string as the 33. A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length L and height h. What is 34. A thin circular ring of mass M and radius r is rotating about its axis with a constant angular velocity $$\omega $$. Fou 35. The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a 36. A body of mass m is placed on earth's surface which is taken from earth surface to a height of h = 3R, then change in gr 37. Consider a compound slab consisting of two different materials having equal thicknesses and thermal conductivities K and 38. An ideal gas heat engine operates in a Carnot cycle between 227oC and 127oC. It absorbs 6 kcal at the height temperature 39. Which one of the following statements is true for the speed v and the acceleration a of a particle executing simple harm 40. The potential energy of a simple harmonic oscillator when the particle is half way to its end point is 41. A particle of mass m oscillates with simple harmonic motion between points x1 and x2, the equilibrium position being O. 42. The time period of mass suspended from a spring is T. If the spring is cut into four equal parts and the same mass is su 43. In case of a forced vibration, the resonance peak becomes very sharp when the 44. Three capacitors each of capacity 4 $$\mu $$F are to be connected in such a way that the effective capacitance is $$6\mu 45. If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be 46. Barrier potential of a p-n junction diode does not depened on 47. A man throws balls with the same speed vertically upwards one after the other at an interval of 2 seconds. What should b
1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Random genetic drift in a population probably
results from
A
Constant low mutation rate
B
Interbreeding within this population
C
Large population size
D
Highly genetically variable individuals
2
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Darwin in his 'Natural Selection Theory' did not
believe in any role of which one of the following
in organic evolution ?
A
Survival of the fittest
B
Parasites and predators as natural enemies
C
Discontinuous variations
D
Struggle for existence
3
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
In a random mating population in equilibrium,
which of the following brings about a change in
gene frequency in a non-directional manner : -
A
Selection
B
Random drift
C
Mutations
D
Migration
4
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Industrial melanism is an example of : -
A
Darkening of skin due to smoke from
industries
B
Defensive adaptation of skin against
ultraviolet radiations
C
Drug resistance
D
Protective resemblance with the surroundings
Paper analysis
Total Questions
Biology
86
Chemistry
42
Physics
47
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