Practice NEET 2020 Biology Questions (Phase – 1)

1. Meiotic division of the secondary oocyte is completed :

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

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

4. Match the following :

Choose the correct option from the following :

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

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

7. Ray florets have :

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

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

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

11. Select the correct statement.

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

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

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

Select the correct option :

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

16. Dissolution of the synaptonemal complex occurs during :

17. 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

18. Goblet cells of alimentary canal are modified from :

19. Which of the following statements is not correct ?

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

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

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

23. Choose the correct pair from the following :

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

25. Floridean starch has structure similar to :

26. 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

27. The enzyme enterokinase helps in conversion of :

28. The process of growth is maximum during :

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

30. Match the following column with respect to meiosis :

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

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

33. Select the option including all sexually transmitted diseases :

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

35. Embryological support for evolution was disapproved by :

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

37. Which of the following statements is correct ?

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

39. 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 :

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

41. Identify the basic amino acid from the following.

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

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

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

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

46. Which of the following is correct about viroids ?

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

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

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

50. Match the organism with its use in biotechnology.

Select the correct option from the following:

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

Select the correct option :

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

53. The ovary is half inferior in :

54. The first phase of translation is :

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

56. 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.

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

58. Identify the wrong statement with reference to immunity.

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

60. 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 :

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

62. Flippers of Penguins and Dolphins are examples of :

63. The QRS complex in a standard ECG represents:

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

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

66. 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.

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

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

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

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

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

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

73. Strobili or cones are found in :

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

75. 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 :

76. Select the correct match.

77. 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

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

79. Identify the incorrect statement.

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

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

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

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

84. 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

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

86. Bilaterally symmetrical and acoelomate animals are exemplified by :

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

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

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