Practice NEET 2020 Biology Questions (Phase – 1)

1. Which of the following is correct about viroids ?

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

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

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

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

6. The enzyme enterokinase helps in conversion of :

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

8. Ray florets have :

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

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

11. Bilaterally symmetrical and acoelomate animals are exemplified by :

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

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

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

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

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

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

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

19. Goblet cells of alimentary canal are modified from :

20. Which of the following statements is not correct ?

21. 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

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

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

24. 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

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

Select the correct option :

26. Choose the correct pair from the following :

27. 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

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

29. Select the correct statement.

30. Match the following :

Choose the correct option from the following :

31. The QRS complex in a standard ECG represents:

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

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

34. Match the following column with respect to meiosis :

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

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

37. Floridean starch has structure similar to :

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

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

40. Dissolution of the synaptonemal complex occurs during :

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

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

43. 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.

44. The first phase of translation is :

45. 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

46. 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 :

47. Flippers of Penguins and Dolphins are examples of :

48. Which of the following statements is correct ?

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

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

51. The process of growth is maximum during :

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

53. 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 :

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

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

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

57. Strobili or cones are found in :

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

59. Embryological support for evolution was disapproved by :

60. Match the organism with its use in biotechnology.

Select the correct option from the following:

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

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

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

64. 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

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

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

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

68. 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 :

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

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

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

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

73. Select the correct match.

74. Select the option including all sexually transmitted diseases :

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

76. Identify the incorrect statement.

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

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

79. 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.

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

81. Identify the basic amino acid from the following.

82. Meiotic division of the secondary oocyte is completed :

83. The ovary is half inferior in :

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

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

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

Select the correct option :

87. Identify the wrong statement with reference to immunity.

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

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

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