Practice NEET 2020 Biology Questions (Phase – 1)

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

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

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

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

6. 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.

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

8. Strobili or cones are found in :

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

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

11. Which of the following is correct about viroids ?

12. The first phase of translation is :

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

14. The enzyme enterokinase helps in conversion of :

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

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

17. 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 :

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

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

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

21. 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

22. 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

23. 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 :

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

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

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

27. Meiotic division of the secondary oocyte is completed :

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

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

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

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

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

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

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

35. Match the following column with respect to meiosis :

36. Match the organism with its use in biotechnology.

Select the correct option from the following:

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

38. The QRS complex in a standard ECG represents:

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

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

41. 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

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

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

Select the correct option :

44. The process of growth is maximum during :

45. Identify the wrong statement with reference to immunity.

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

47. Floridean starch has structure similar to :

48. Select the correct match.

49. Which of the following statements is correct ?

50. Goblet cells of alimentary canal are modified from :

51. Choose the correct pair from the following :

52. 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

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

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

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

56. 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 :

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

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

59. Which of the following statements is not correct ?

60. The ovary is half inferior in :

61. Embryological support for evolution was disapproved by :

62. Select the option including all sexually transmitted diseases :

63. Flippers of Penguins and Dolphins are examples of :

64. Dissolution of the synaptonemal complex occurs during :

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

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

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

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

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

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

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

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

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

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

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

Select the correct option :

76. Select the correct statement.

77. Match the following :

Choose the correct option from the following :

78. Identify the basic amino acid from the following.

79. Identify the incorrect statement.

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

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

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

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

84. Bilaterally symmetrical and acoelomate animals are exemplified by :

85. Ray florets have :

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

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

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

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

90. 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.