NEET 2013 | NEET Year Wise Previous Years Questions

Biology

1. Meiosis takes place in 2. During seed germination its stored food is mobilized by 3. The diagram given here is the standard ECG of a normal person. The P-wave represents the 4. The H-zone in the skeletal muscle fibre is due to 5. Select the correct statement with respect to locomotion in humans. 6. The characteristic and an example of a synovial joint in humans is 7. The most abundant intracellular cation is 8. Which of the following statements is correct in relation to the endocrine system? 9. A pregnant female delivers a baby who suffers from stunted growth, mental retardation, low intelligence quotient and abn 10. Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency s 11. Seed coat is not thin, membranous in 12. The three boxes in this diagram represent the three major biosynthetic pathway in aerobic respiration. Arrows represent 13. Perisperm differs from endosperm in 14. Advantage of cleistogamy is 15. Megasporangium is equivalent to 16. Which one of the following statements is correct? 17. Product of sexual reproduction generally generates 18. What is the correct sequence of sperm formation? 19. Which of the following is not the function of placenta? 20. Menstrual flow occurs due to lack of : 21. Artificial insemination means : 22. One of the legal methods of birth control is : 23. Which group of animals belong to the same phylum? 24. Which one of the following is not a correct statement? 25. Which of the following are likely to be present in deep sea water? 26. Pigment containing membranous extensions in some cyanobacteria are 27. Select the wrong statement 28. Isogamous condition with non-flagellated gametes is found in 29. Monoecious plant of Chara shows occurrence of 30. Read the following statements (A - E) and answer the question which follows them. (A)   In liverworts, mo 31. Which of the following are correctly matched with respect to their taxonomic classification? 32. One of the representatives of Phylum Arthropoda is 33. Match the name of the animal (column I), with one characteristic (column II), and the phylum/class (column III) to which 34. Select the incorrect statement with regard to Haemophilia is : 35. Among bitter gourd, mustard, brinjal, pumpkin, china rose, lupin, cucumber, sunhemp, gram, guava, beam, chilli, plum, pe 36. In China rose the flowers are 37. A phosphoglyceride is always made up of 38. Macromolecule chitin is 39. The essential chemical components of many coenzymes are 40. Transition state structure of the substrate formed during an enzymatic reaction is 41. The complex formed by a pair of synapsed homologous chromosomes is called 42. Which of the metabolites is common to respiration-mediated breakdown of fats, carbohydrates and proteins? 43. Interfascicular cambium develops from the cells of : 44. Natural reservoir of phosphorus is : 45. Which one of the following processes during decomposition is correctly described ? 46. Secondary productivity is rate of formation of new organic matter by : 47. Which one of the following is not used for ex situ plant conservation? 48. Which of the following represent maximum number of species among global biodiversity ? 49. Which of the following represent maximum number of species among global biodiversity ? 50. Lenticels are involved in 51. Age of a tree can be estimated by : 52. A biologist studied the population of rats in a barn, He found that the average natality was 250, average mortality 240, 53. What external changes are visible after the last moult of a cockroach nymph ? 54. Which one of the following organelle in the figure correctly matches with its function ? 55. A major site for synthesis of lipids is : 56. The Golgi complex plays a major role : 57. A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with 58. The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which give 59. The given figure shows schematic plan of blood circulation in humans with labels A to D. Identify the label and give its 60. Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification alon 61. A diagram showing axon terminal and synapse is given. Identify correctly at least two of A - D. 62. Figure shows human urinary system with structures labelled A to D. Select option which correctly identifies them and giv 63. The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to 64. Which idea is depicted by a cross in which the F1 generation resembles both the parents? 65. If two persons with 'AB' blood group marry and have sufficiently large number of children, these children could be class 66. Which of the following cannot be detected in a developing foetus by amniocentesis ? 67. If both parents are carriers for thalessemia, which is an autosomal recessive disorder, what are the chances of pregnanc 68. The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C. 69. Which enzyme will be produced in a cell in which there is a non-sense mutation in the lac Y gene ? 70. Which of the following statements is not true of two genes that show 50% recombination frequency ? 71. According to Darwin, the organic evolution is due to - 72. The tendency of population to remain in genetic equilibrium may be disturbed by : 73. Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred 74. The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function, This is an ex 75. Infection of Ascaris usually occurs by : 76. A good producer of citric acid is 77. DNA fragments generated by the restriction endonucleases in a chemical reaction can be separated by : 78. Which of the following is not corretly matched for the organism and its cell wall degrading enzyme ? 79. The colonies of recombinat bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of : 80. Which of the following Bt crops is being grown in India by the farmers ? 81. A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is : 82. Besides paddy fields, cyanobacteria are also found inside vegetative part of :

Chemistry

Physics

1. For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens b 2. A, B and C are three points in a uniform electric field. The electric potential is 3. The resistances of the four arms P, Q, R and S in a Wheatstone's bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectiv 4. The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 $$\Omega $$ is 5. A wire of resistance 4 $$\Omega $$ is stretched to twice its original length. The resistance of stretched wire would be 6. When a proton is released from rest in a room, it starts with an initial acceleration $$a$$0 towards west. When it is pr 7. A current loop in a magnetic field 8. A bar magnet of length $$'l'$$ and magnetic dipole moment 'M' is bent in the form of an arc as shown in figure. The new 9. A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is 10. A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when 11. The condition under which a microwave oven heats up a food item containing water molecules most efficiently is 12. A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses a 13. Two pith balls carrying equal charges are suspended from a common point by strings of equal length, the equilibrium sepa 14. In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths $${\lambda 15. A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a larg 16. For photoelectric emission from certain metal the cutoff frequency is $$\upsilon $$. If radiation of frequency 2$$\upsil 17. The wavelength $$\lambda $$e of an electron and $$\lambda $$p of a photon of same energy E are related by 18. Ratio of longest wave lengths corresponding to Lyman and Balmer series in hydrogen spectrum is 19. A certain mass of Hydrogen is changed to Helium by the process of fusion. The mass defect in fusion reaction is 0.02866 20. The output (X) of the logic circuit shown ion figure will be 21. A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white h 22. A stone falls freely under gravity. It covers distances h1, h2 and h3 in the first 5 seconds, the next 5 seconds and th 23. The velocity of a projectile at the initial point A is $$\left( {2\widehat i + 3\widehat j} \right)$$ m/s. It's velocity 24. An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. Th 25. The upper half of an inclined plane of inclination $$\theta $$ is perfectly smooth while lower half is rough. A block st 26. Three blocks with masses m, 2m and 3m are connected by strings, as shown in the figure. After an upward force F is appli 27. A uniform force of $$\left( {3\widehat i + \widehat j} \right)$$ newton acts on a particle of mass 2 kg. Hence the parti 28. A small object of uniform density rolls up a curved surface with an initial velocity 'v'. It reaches upto a maximum heig 29. A rod PQ of mass M and length L is hinged at end P. The rod is kept horizontal by a massless string tied to point Q as s 30. A body of mass 'm' is taken from the earth's surface to the height equal to twice the radius (R) of the earth. The chang 31. Infinite number of bodies, each of mass 2 kg are situated on x-axis at distance 1 m, 2 m, 4 m, 8 m, . . . , respectively 32. The molar specific heats of an ideal gas at constant pressure and volume are denoted by Cp and Cv, respectively. If &nbs 33. The following four wires are made of the same material. Which of these will have the largest extension when the same ten 34. The wettability of a surface by a liquid depends primarily on 35. The amount of heat energy required to raise the temperature of 1 g of Helium at NTP, from T1K to T2K is 36. During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its temperature. The ratio 37. In the given (V $$-$$ T) diagram, what is the relation between pressure P1 and P2? 38. A gas is taken through the cycle A $$ \to $$ B $$ \to $$ C $$ \to $$ A, as shown. what is the net work done by the gas 39. If we study the vibration of a pipe open at both ends. then the following statement is not true. 40. A wave travelling in the + ve x-direction having displacement along y-direction as 1 m, wavelength 2$$\pi $$ m and freq 41. A source of unknown frequency gives 4 beats/s when sounded with a source of known frquency 250 Hz. The second harmonic o 42. If an experiment four quantities a, b, c and d are measured with percentage error 1%, 2%, 3% and 4% respectively. Quant

NEET 2013

MCQ (Single Correct Answer)

-1

Two pith balls carrying equal charges are suspended from a common point by strings of equal length, the equilibrium separation between them is r. Now the strings are rigidly clamped at half the height. The equilibrium separation between the balls now become

NEET 2013 Physics - Electrostatics Question 60 English

NEET 2013 Physics - Electrostatics Question 60 English

$$\left( {{{2r} \over {\sqrt 3 }}} \right)$$

$$\left( {{{2r} \over 3}} \right)$$

$${\left( {{1 \over {\sqrt 2 }}} \right)^2}$$

$$\left( {{r \over {\root 3 \of 2 }}} \right)$$

NEET 2013

MCQ (Single Correct Answer)

-1

In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths $${\lambda _1}$$ = 12000 $$\mathop A\limits^ \circ $$ and $${\lambda _2}$$ = 10000 $$\mathop A\limits^ \circ $$. At what minimum distance from the common central bright fringe on the screen 2 m from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other ?

4 mm

3 m

8 mm

6 mm

NEET 2013

MCQ (Single Correct Answer)

-1

A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a large distance from the slit. If the speed of the electrons is increased, which of the following statements is correct ?

The angular width of the central maximum will decrease.

The angular wifth of the central maximum will be unaffected.

Diffraction pattern is not observed on the screen in the case of electrons.

The angular width of the central maximum of the diffraction pattern will increase.

NEET 2013

MCQ (Single Correct Answer)

-1

For photoelectric emission from certain metal the cutoff frequency is $$\upsilon $$. If radiation of frequency 2$$\upsilon $$ impinges on the metal plate, the maximum possible velocity of the emitted electron will be (m is the electron mass)

$$\sqrt {{{2h\upsilon } \over m}} $$

$$2\sqrt {{{h\upsilon } \over m}} $$

$$\sqrt {{{h\upsilon } \over {\left( {2m} \right)}}} $$

$$\sqrt {{{h\upsilon } \over m}} $$

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