Practice NEET 2020 Biology Questions (Phase – 1)

1. Which of the following is correct about viroids ?

2. Floridean starch has structure similar to :

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

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

5. Which of the following statements is correct ?

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

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

8. Select the correct match.

9. 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 :

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

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

12. The enzyme enterokinase helps in conversion of :

13. Identify the incorrect statement.

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

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

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

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

18. Bilaterally symmetrical and acoelomate animals are exemplified by :

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

20. Goblet cells of alimentary canal are modified from :

21. Dissolution of the synaptonemal complex occurs during :

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

23. Ray florets have :

24. Select the option including all sexually transmitted diseases :

25. Strobili or cones are found in :

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

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

Select the correct option :

28. Match the organism with its use in biotechnology.

Select the correct option from the following:

29. 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 :

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

31. Flippers of Penguins and Dolphins are examples of :

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

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

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

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

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

37. 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.

38. Embryological support for evolution was disapproved by :

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

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

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

42. Select the correct statement.

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

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

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

46. 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.

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

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

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

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

51. 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

52. 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

53. Match the following column with respect to meiosis :

54. Meiotic division of the secondary oocyte is completed :

55. Which of the following statements is not correct ?

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

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

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

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

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

61. 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

62. Identify the wrong statement with reference to immunity.

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

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

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

66. 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 :

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

68. Identify the basic amino acid from the following.

69. The process of growth is maximum during :

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

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

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

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

74. Match the following :

Choose the correct option from the following :

75. The ovary is half inferior in :

76. 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

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

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

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

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

81. The first phase of translation is :

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

83. The QRS complex in a standard ECG represents:

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

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

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

87. 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

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

Select the correct option :

89. Choose the correct pair from the following :

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