Practice NEET 2020 Biology Questions (Phase – 1)

1. Snow-blindness in Antarctic region is due to :

2. Identify the wrong statement with reference to transport of oxygen.

3. If the head of cockroach is removed, it may live for few days because :

4. Select the correct events that occur during inspiration.

(a) Contraction of diaphragm

(b) Contraction of external inter-costal muscles

(c) Pulmonary volume decreases

(d) Intra pulmonary pressure increases

5. The number of substrate level phosphorylations in one turn of citric acid cycle is :

6. Montreal protocol was signed in 1987 for control of :

7. Embryological support for evolution was disapproved by :

8. The infectious stage of Plasmodium that enters the human body is :

9. Cuboidal epithelium with brush border of microvilli is found in :

10. Match the following columns and select the correct option.

11. Which of the following is correct about viroids ?

12. The QRS complex in a standard ECG represents:

13. Match the following column with respect to meiosis :

14. The roots that originate from the base of the stem are :

15. Identify the wrong statement with reference to immunity.

16. Match the following columns and select the correct option :

Column-I                   Column-II

(a) Pituitary gland     (i) Grave’s disease

(b) Thyroid gland      (ii) Diabetes mellitus

(c) Adrenal gland      (iii) Diabetes insipidus

(d) Pancreas               (iv) Addision’s disease

17. Dissolution of the synaptonemal complex occurs during :

18. Match the following diseases with the causative organism and select the correct option.

Column – I            Column – II

(a) Typhoid           (i) Wuchereria

(b) Pneumonia     (ii) Plasmodium

(c) Filariasis          (iii) Salmonella

(d) Malaria            (iv) Haemophilus

19. Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.

20. Match the following columns and select the correct option.

21. Identify the substances having glycosidic bond and peptide bond, respectively in their structure :

22. Match the following columns and select the correct option.

23. The specific palindromic sequence which is recognized by EcoRI is :

24. In gel electrophoresis, separated DNA fragments can be visualized with the help of :

25. The body of the ovule is fused within the funicle at :

26. Identify the incorrect statement.

27. From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask :

28. Goblet cells of alimentary canal are modified from :

29. Experimental verification of the chromosomal theory of inheritance was done by :

30. In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?

31. The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of :

32. Which of the following statements are true for the phylum-Chordata ?

(a) In Urochordata notochord extends from head to tail and it is present throughout their life.

(b) In Vertebrata notochord is present during the embryonic period only.

(c) Central nervous system is dorsal and hollow.

(d) Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata.

33. Which of the following regions of the globe exhibits highest species diversity?

34. The first phase of translation is :

35. Which of the following is not an inhibitory substance governing seed dormancy?

36. Identify the basic amino acid from the following.

37. If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 10⁹ bp, then the length of the DNA is approximately :

38. Which of the following is the most abundant protein in the animals ?

39. Choose the correct pair from the following :

40. Identify the wrong statement with regard to Restriction Enzymes.

41. The plant parts which consist of two generations one within the other :

(a) Pollen grains inside the anther

(b) Germinated pollen grain with two male gametes

(c) Seed inside the fruit

(d) Embryo sac inside the ovule

42. The enzyme enterokinase helps in conversion of :

43. Match the following columns and select the correct option.

44. Presence of which of the following conditions in urine are indicative of Diabetes Mellitus ?

45. Match the following columns and select the correct option.

46. Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing  the yield of sugarcane crop.

47. Match the following :

Choose the correct option from the following :

48. The process of growth is maximum during :

49. Identify the correct statement with regard to G₁ phase (Gap 1) of interphase.

50. In water hyacinth and water lily, pollination takes place by :

51. Match the following columns and select the correct option.

52. Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G₀). This process occurs at the end of :

53. How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?

54. According to Robert May, the global species diversity is about :

55. Floridean starch has structure similar to :

56. Bilaterally symmetrical and acoelomate animals are exemplified by :

57. Which of the following pairs is of unicellular algae?

58. Which of the following statements is not correct ?

59. Match the following concerning essential elements and their functions in plants :

Select the correct option :

60. Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle?

61. The transverse section of a plant shows following anatomical features:

(a) Large number of scattered vascular bundles surrounded by bundle sheath.

(b) Large conspicuous parenchymatous ground tissue.

(c) Vascular bundles conjoint and closed.

(d) Phloem parenchyma absent.

Identify the category of plant and its part :

62. Name the enzyme that facilitates opening of DNA helix during transcription.

63. Which of the following is put into Anaerobic sludge digester for further sewage treatment ?

64. Which of the following would help in prevention of diuresis ?

65. Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action?

(a) Darwin’s Finches of Galapagos islands.

(b) Herbicide resistant weeds.

(c) Drug resistant eukaryotes.

(d) Man-created breeds of domesticated animals like dogs.

66. Select the correct match.

67. The ovary is half inferior in :

68. Select the option including all sexually transmitted diseases :

69. Select the correct statement.

70. Flippers of Penguins and Dolphins are examples of :

71. Identify the correct statement with reference to human digestive system.

72. Ray florets have :

73. Match the following columns and select the correct option.

74. The sequence that controls the copy number of the linked DNA in the vector, is termed :

75. In light reaction, plastoquinone facilitates the transfer of electrons from :

76. The process reponsible for facilitating loss of water in liquid form from the tip of grasss blades at night and in early morning is :

77. Strobili or cones are found in :

78. Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their :

79. Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to :

80. In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct ?

81. Which of the following statements is correct ?

82. Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells ?

83. Match the trophic levels with their correct species examples in grassland ecosystem.

Select the correct option :

84. Match the following columns and select the correct option.

Column – I                  Column – II

(a) Bt cotton                (i) Gene therapy

(b) ADA deficiency   (ii) Cellular defence

(c) RNAi infection    (iii) Detection of HIV

(d) PCR                        (iv) Bacillus thuringiensis

85. The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are :

86. By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams ?

87. Which of the following is not an attribute of a population?

88. Meiotic division of the secondary oocyte is completed :

89. Which of the following statements about inclusion bodies is incorrect ?

90. Match the organism with its use in biotechnology.

Select the correct option from the following: