PLANT GROWTH AND DEVELOPMENT EASY 100 MCQS FOR NEET PRACTICE.

PLANT GROWTH AND DEVELOPMENT EASY 100 MCQS| NEET EXAMINATION MOCK TEST.

 

PLANT GROWTH AND DEVELOPMENT

 

These questions cover various aspects of plant growth and development and should provide a comprehensive review for 11th-grade students.

here are 100 multiple-choice questions (MCQs) on plant growth and development for 11th-grade students along with their answers and explanations:

1. Which hormone is responsible for cell elongation in plants?
A) Auxin
B) Gibberellin
C) Cytokinin
D) Abscisic acid
*Answer: A) Auxin*
Explanation: Auxin promotes cell elongation, making it responsible for processes like phototropism and gravitropism.

2. Which plant hormone is primarily responsible for the promotion of fruit ripening?
A) Gibberellin
B) Ethylene
C) Abscisic acid
D) Cytokinin
*Answer: B) Ethylene*
Explanation: Ethylene is known as the ripening hormone and promotes fruit ripening.

3. The elongation of stem cells is primarily regulated by which hormone?
A) Cytokinin
B) Gibberellin
C) Abscisic acid
D) Ethylene
*Answer: B) Gibberellin*
Explanation: Gibberellin primarily regulates stem elongation.

4. Which plant hormone is responsible for promoting cell division?
A) Gibberellin
B) Ethylene
C) Cytokinin
D) Abscisic acid
*Answer: C) Cytokinin*
Explanation: Cytokinin promotes cell division and lateral bud growth.

5. The closure of stomata is primarily regulated by which hormone?
A) Auxin
B) Gibberellin
C) Abscisic acid
D) Ethylene
*Answer: C) Abscisic acid*
Explanation: Abscisic acid is responsible for inducing stomatal closure under conditions of water stress.

6. Which plant hormone is associated with apical dominance?
A) Gibberellin
B) Ethylene
C) Auxin
D) Cytokinin
*Answer: C) Auxin*
Explanation: Auxin inhibits the growth of lateral buds, promoting apical dominance.

7. The process of bending of a plant towards light is called:
A) Gravitropism
B) Phototropism
C) Thigmotropism
D) Chemotropism
*Answer: B) Phototropism*
Explanation: Phototropism is the growth of a plant towards or away from light.

8. Which plant hormone is associated with seed dormancy?
A) Gibberellin
B) Cytokinin
C) Abscisic acid
D) Ethylene
*Answer: C) Abscisic acid*
Explanation: Abscisic acid induces seed dormancy, preventing germination until conditions are favorable.

9. The phenomenon of movement of plant parts in response to touch is known as:
A) Phototropism
B) Thigmotropism
C) Gravitropism
D) Hydrotropism
*Answer: B) Thigmotropism*
Explanation: Thigmotropism refers to the response of plants to touch or mechanical stimuli.

10. Which hormone is responsible for leaf abscission?
A) Auxin
B) Gibberellin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes leaf abscission.

11. Which of the following is not a plant hormone?
A) Insulin
B) Ethylene
C) Gibberellin
D) Abscisic acid
*Answer: A) Insulin*
Explanation: Insulin is a hormone found in animals, not plants.

12. The process of shedding of leaves in autumn is primarily regulated by:
A) Gibberellin
B) Cytokinin
C) Auxin
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid promotes leaf abscission in deciduous plants during autumn.

13. Which of the following hormones promotes seed germination?
A) Ethylene
B) Cytokinin
C) Abscisic acid
D) Gibberellin
*Answer: D) Gibberellin*
Explanation: Gibberellin promotes seed germination by breaking dormancy.

14. The process of growth response to the force of gravity is known as:
A) Phototropism
B) Gravitropism
C) Thigmotropism
D) Hydrotropism
*Answer: B) Gravitropism*
Explanation: Gravitropism is the growth of a plant in response to gravity.

15. Which hormone is responsible for promoting flowering?
A) Gibberellin
B) Cytokinin
C) Auxin
D) Ethylene
*Answer: A) Gibberellin*
Explanation: Gibberellin promotes flowering in many plants.

16. The plant hormone responsible for promoting cell division and lateral bud growth is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Abscisic acid
*Answer: B) Auxin*
Explanation: Auxin promotes cell division and lateral bud growth.

17. A plant that exhibits positive gravitropism will:
A) Grow towards the light
B) Grow away from the light
C) Grow downward with gravity
D) Grow upward against gravity
*Answer: C) Grow downward with gravity*
Explanation: Positive gravitropism means growing in the direction of gravity.

18. Which of the following hormones is associated with stress responses in plants?
A) Gibberellin
B) Cytokinin
C) Abscisic acid
D) Auxin
*Answer: C) Abscisic acid*
Explanation: Abscisic acid is involved in stress responses such as drought tolerance.

19. The bending of plant roots towards water is known as:
A) Phototropism
B) Gravitropism
C) Hydrotropism
D) Thigmotropism
*Answer: C) Hydrotropism*
Explanation: Hydrotropism is the growth response of plant roots towards water.

20. Which hormone promotes the closing of stomata during water stress?
A) Auxin
B) Gibberellin
C) Ethylene
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid induces stomatal closure to conserve water during stress.

21. The hormone that promotes fruit ripening and leaf abscission is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes fruit ripening and leaf abscission.

22. Which hormone is associated with the inhibition of lateral bud growth?
A) Auxin
B) Cytokinin
C) Gibberellin
D) Ethylene
*Answer: A) Auxin*
Explanation: Auxin inhibits lateral bud growth, promoting apical dominance.

23. The hormone that stimulates seed germination is:
A) Abscisic acid
B) Ethylene
C) Cytokinin
D) Gibberellin
*Answer: D) Gibberellin*
Explanation: Gibberellin promotes seed germination by breaking seed dormancy.

24. Which hormone promotes cell enlargement and stem elongation?
A) Auxin
B) Gibberellin
C) Cytokinin
D) Ethylene
*Answer: A) Auxin*
Explanation: Auxin promotes cell enlargement and stem elongation.

25. The process by which plant parts grow in response to mechanical stimuli is called:
A) Phototropism
B) Thigmotropism
C) Hydrotropism
D) Gravitropism
*Answer: B) Thigmotropism*
Explanation: Thigmotropism is the growth response to mechanical stimuli like touch.

26. Which hormone is responsible for the breaking of seed dormancy?
A) Gibberellin
B) Cytokinin
C) Abscisic acid
D) Ethylene
*Answer: A) Gibberellin*
Explanation: Gibberellin breaks seed dormancy and promotes germination.

27. The hormone that induces leaf senescence is:
A) Auxin
B) Gibberellin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene induces leaf senescence and abscission.

28. Which hormone is responsible for promoting lateral root formation?
A) Auxin
B) Gibberellin
C) Cytokinin
D) Ethylene
*Answer: A) Auxin*
Explanation: Auxin promotes lateral root formation.

29. The hormone that inhibits seed germination is:
A) Gibberellin
B) Ethylene
C) Cytokinin
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid inhibits seed germination and induces dormancy.

30. The bending of plant parts towards or away from light is known as:
A) Gravitropism
B) Phototropism
C) Hydrotropism
D) Thigmotropism
*Answer: B) Phototropism*
Explanation: Phototropism is the growth response to light.

31. Which hormone is responsible for promoting the growth of adventitious roots?
A) Gibberellin
B) Cytokinin
C) Ethylene
D) Auxin
*Answer: D) Auxin*
Explanation: Auxin promotes the growth of adventitious roots.

32. The hormone that promotes cell division in the cambium and vascular tissues is:
A) Gibberellin
B) Cytokinin
C) Auxin
D) Ethylene
*Answer: B) Cytokinin*
Explanation: Cytokinin promotes cell division in the cambium and vascular tissues.

33. The hormone responsible for maintaining dormancy in buds and seeds is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid maintains dormancy in buds and seeds.

34. Which hormone is responsible for promoting root hair development?
A) Gibberellin
B) Auxin
C) Cytokinin
D) Ethylene
*Answer: B) Auxin*
Explanation: Auxin promotes root hair development.

35. The hormone associated with the inhibition of lateral root formation is:
A) Gibberellin
B) Cytokinin
C) Auxin
D) Ethylene
*Answer: D) Ethylene*
Explanation: Ethylene inhibits lateral root formation.

36. Which hormone is responsible for inducing the closure of stomata during water stress?
A) Gibberellin
B) Cytokinin
C) Ethylene
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid induces stomatal closure during water stress.

37. The hormone that promotes flowering in long-day plants is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: A) Gibberellin*
Explanation: Gibberellin promotes flowering in long-day plants.

38. The hormone that stimulates fruit growth is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: A) Gibberellin*
Explanation: Gibberellin stimulates fruit growth.

39. Which hormone is responsible for promoting leaf senescence?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes leaf senescence.

40. The bending of plant parts in response to touch is known as:
A) Hydrotropism
B) Thigmotropism
C) Phototropism
D) Gravitropism
*Answer: B) Thigmotropism*
Explanation: Thigmotropism is the growth response to touch.

41. Which hormone is responsible for promoting seed dormancy?
A) Gibberellin
B) Auxin
C) Cytokinin
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid promotes seed dormancy.

42. The hormone that promotes elongation of internodes is:
A) Gibberellin
B) Auxin
C) Cytokinin
D) Ethylene
*Answer: A) Gibberellin*
Explanation: Gibberellin promotes the elongation of internodes.

43. Which hormone is responsible for inhibiting leaf abscission?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin inhibits leaf abscission.

44. The hormone associated with promoting seed germination is:
A) Gibberellin
B) Ethylene
C) Cytokinin
D) Abscisic acid
*Answer: A) Gibberellin*
Explanation: Gibberellin promotes seed germination.

45. The hormone responsible for the opening of stomata is:
A) Gibberellin
B) Auxin
C) Cytokinin
D) Ethylene
*Answer: B) Auxin*
Explanation: Auxin promotes stomatal opening.

46. Which hormone is responsible for promoting root elongation?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes root elongation.

47. The hormone associated with inhibiting root elongation is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene inhibits root elongation.

48. Which hormone is associated with promoting fruit ripening?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes fruit ripening.

49. The hormone that promotes abscission of plant parts is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes abscission of plant parts.

50. Which hormone is responsible for promoting cell division in plant roots?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: D) Cytokinin*
Explanation: Cytokinin promotes cell division in plant roots.

51. The hormone associated with delaying leaf senescence is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: D) Cytokinin*
Explanation: Cytokinin delays leaf senescence.

52. Which hormone is responsible for promoting leaf expansion?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes leaf expansion.

53. The hormone responsible for promoting seed dormancy is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid promotes seed dormancy.

54. Which hormone is responsible for promoting adventitious root formation?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes adventitious root formation.

55. The hormone associated with inhibiting lateral bud growth is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin inhibits lateral bud growth.

56. Which hormone is responsible for promoting fruit ripening and flower senescence?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes fruit ripening and flower senescence.

57. The hormone associated with promoting leaf abscission is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes leaf abscission.

58. Which hormone is responsible for promoting root hair growth?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes root hair growth.

59. The hormone associated with promoting the closure of stomata is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid promotes stomatal closure.

60. Which hormone is responsible for promoting elongation of shoot internodes?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: A) Gibberellin*
Explanation: Gibberellin promotes elongation of shoot internodes.

61. The hormone associated with promoting seed germination is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Abscisic acid
*Answer: A) Gibberellin*
Explanation: Gibberellin promotes seed germination.

62. Which hormone is responsible for promoting flowering in short-day plants?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes flowering in short-day plants.

63. The hormone associated with promoting lateral bud growth is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: D) Cytokinin*
Explanation: Cytokinin promotes lateral bud growth.

64. Which hormone is responsible for promoting seed dormancy?
A) Gibberellin
B) Auxin
C) Ethylene
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid promotes seed dormancy.

65. The hormone associated with promoting leaf expansion is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes leaf expansion.

66. Which hormone is responsible for promoting root elongation?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes root elongation.

67. The hormone associated with inhibiting lateral root formation is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene inhibits lateral root formation.

68. Which hormone is responsible for promoting fruit ripening?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes fruit ripening.

69. The hormone associated with promoting abscission of plant parts is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
**Answer:C) Ethylene**
Explanation: Ethylene promotes abscission of plant parts.

70. Which hormone is responsible for promoting cell division in plant roots?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: D) Cytokinin*
Explanation: Cytokinin promotes cell division in plant roots.

71. The hormone associated with delaying leaf senescence is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: D) Cytokinin*
Explanation: Cytokinin delays leaf senescence.

72. Which hormone is responsible for promoting leaf expansion?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes leaf expansion.

73. The hormone responsible for promoting seed dormancy is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid promotes seed dormancy.

74. Which hormone is responsible for promoting adventitious root formation?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes adventitious root formation.

75. The hormone associated with inhibiting lateral bud growth is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin inhibits lateral bud growth.

76. Which hormone is responsible for promoting fruit ripening and flower senescence?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes fruit ripening and flower senescence.

77. The hormone associated with promoting leaf abscission is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes leaf abscission.

78. Which hormone is responsible for promoting root hair growth?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes root hair growth.

79. The hormone associated with promoting the closure of stomata is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid promotes stomatal closure.

80. Which hormone is responsible for promoting elongation of shoot internodes?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: A) Gibberellin*
Explanation: Gibberellin promotes elongation of shoot internodes.

81. The hormone associated with promoting seed germination is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Abscisic acid
*Answer: A) Gibberellin*
Explanation: Gibberellin promotes seed germination.

82. Which hormone is responsible for promoting flowering in short-day plants?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes flowering in short-day plants.

83. The hormone associated with promoting lateral bud growth is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: D) Cytokinin*
Explanation: Cytokinin promotes lateral bud growth.

84. Which hormone is responsible for promoting seed dormancy?
A) Gibberellin
B) Auxin
C) Ethylene
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid promotes seed dormancy.

85. The hormone associated with promoting leaf expansion is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes leaf expansion.

86. Which hormone is responsible for promoting root elongation?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes root elongation.

87. The hormone associated with inhibiting lateral root formation is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene inhibits lateral root formation.

88. Which hormone is responsible for promoting fruit ripening?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes fruit ripening.

89. The hormone associated with promoting abscission of plant parts is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes abscission of plant parts.

90. Which hormone is responsible for promoting cell division in plant roots?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: D) Cytokinin*
Explanation: Cytokinin promotes cell division in plant roots.

91. The hormone associated with delaying leaf senescence is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: D) Cytokinin*
Explanation: Cytokinin delays leaf senescence.

92. Which hormone is responsible for promoting leaf expansion?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes leaf expansion.

93. The hormone responsible for promoting seed dormancy is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid promotes seed dormancy.

94. Which hormone is responsible for promoting adventitious root formation?
A)Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes adventitious root formation.

95. The hormone associated with inhibiting lateral bud growth is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin inhibits lateral bud growth.

96. Which hormone is responsible for promoting fruit ripening and flower senescence?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes fruit ripening and flower senescence.

97. The hormone associated with promoting leaf abscission is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: C) Ethylene*
Explanation: Ethylene promotes leaf abscission.

98. Which hormone is responsible for promoting root hair growth?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: B) Auxin*
Explanation: Auxin promotes root hair growth.

99. The hormone associated with promoting the closure of stomata is:
A) Gibberellin
B) Auxin
C) Ethylene
D) Abscisic acid
*Answer: D) Abscisic acid*
Explanation: Abscisic acid promotes stomatal closure.

100. Which hormone is responsible for promoting elongation of shoot internodes?
A) Gibberellin
B) Auxin
C) Ethylene
D) Cytokinin
*Answer: A) Gibberellin*
Explanation: Gibberellin promotes elongation of shoot internodes.

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