MINERAL NUTRITION IMPORTANT 100 MCQS| NEET EXAMINATION

MINERAL NUTRITION IMPORTANT 100 MCQS WHICH WILL HELP

MINERAL NUTRITION

 

here are 100 multiple-choice questions on mineral nutrition for 11th grade students, along with answers and explanations:

 

1. Which of the following is NOT a macronutrient required by plants?
a) Nitrogen
b) Iron
c) Potassium
d) Phosphorus
Answer: b) Iron
Explanation: Iron is a micronutrient required by plants, while nitrogen, potassium, and phosphorus are macronutrients.

2. Which of the following elements is essential for the synthesis of chlorophyll?
a) Calcium
b) Magnesium
c) Zinc
d) Manganese
Answer: b) Magnesium
Explanation: Magnesium is a key component of chlorophyll molecules.

3. Legumes can fix atmospheric nitrogen with the help of:
a) Nodules
b) Rhizoids
c) Stomata
d) Xylem
Answer: a) Nodules
Explanation: Legumes form nodules on their roots, which contain nitrogen-fixing bacteria.

4. Which mineral nutrient deficiency causes chlorosis in leaves, starting from the tips?
a) Nitrogen
b) Iron
c) Potassium
d) Magnesium
Answer: d) Magnesium
Explanation: Magnesium deficiency leads to chlorosis, starting from the leaf tips and progressing inward.

5. What is the primary function of phosphorus in plants?
a) Formation of chlorophyll
b) Cell division and growth
c) Activation of enzymes
d) Water and nutrient uptake
Answer: b) Cell division and growth
Explanation: Phosphorus plays a crucial role in cell division and growth processes in plants.

6. Which of the following is NOT a micronutrient required by plants?
a) Copper
b) Calcium
c) Boron
d) Zinc
Answer: b) Calcium
Explanation: Calcium is a macronutrient, not a micronutrient, for plant growth.

7. What is the main function of potassium in plants?
a) Energy transfer
b) Water uptake
c) Cell wall formation
d) Protein synthesis
Answer: a) Energy transfer
Explanation: Potassium is involved in energy transfer within plant cells.

8. Yellowing of leaves due to nitrogen deficiency first appears in:
a) Older leaves
b) Younger leaves
c) Leaf veins
d) Leaf margins
Answer: a) Older leaves
Explanation: Nitrogen deficiency symptoms typically appear first in older leaves.

9. Calcium deficiency in plants can lead to:
a) Wilting
b) Blossom-end rot
c) Stunted growth
d) Chlorosis
Answer: b) Blossom-end rot
Explanation: Calcium deficiency can cause blossom-end rot in fruits like tomatoes and peppers.

10. Which mineral nutrient is involved in the activation of enzymes responsible for photosynthesis?
a) Zinc
b) Manganese
c) Magnesium
d) Iron
Answer: b) Manganese
Explanation: Manganese activates enzymes involved in photosynthesis.

11. Nitrogen is a component of which important plant molecules?
a) ATP
b) DNA
c) Chlorophyll
d) All of the above
Answer: d) All of the above
Explanation: Nitrogen is a component of ATP, DNA, and chlorophyll.

12. Which of the following elements is a constituent of amino acids, proteins, and nucleic acids?
a) Magnesium
b) Phosphorus
c) Sulfur
d) Potassium
Answer: c) Sulfur
Explanation: Sulfur is a constituent of amino acids, proteins, and nucleic acids.

13. Boron deficiency in plants can result in:
a) Yellowing of leaves
b) Poor root development
c) Blossom drop
d) All of the above
Answer: d) All of the above
Explanation: Boron deficiency can cause multiple symptoms, including yellowing of leaves, poor root development, and blossom drop.

14. Which nutrient is responsible for the opening and closing of stomata?
a) Potassium
b) Calcium
c) Magnesium
d) Zinc
Answer: a) Potassium
Explanation: Potassium regulates the opening and closing of stomata.

15. Which of the following is NOT a function of calcium in plants?
a) Cell wall formation
b) Regulation of enzyme activity
c) Nitrogen fixation
d) Membrane integrity
Answer: c) Nitrogen fixation
Explanation: Calcium is not directly involved in nitrogen fixation.

16. Zinc deficiency in plants can cause:
a) Rosette formation
b) Leaf curling
c) Delayed flowering
d) All of the above
Answer: d) All of the above
Explanation: Zinc deficiency can result in various symptoms including rosette formation, leaf curling, and delayed flowering.

17. Molybdenum deficiency in plants can lead to:
a) Interveinal chlorosis
b) Wilting
c) Nodulation failure in legumes
d) Root rot
Answer: c) Nodulation failure in legumes
Explanation: Molybdenum deficiency can cause nodulation failure in legumes due to its role in nitrogen fixation.

18. Which nutrient is essential for the synthesis of DNA and RNA in plants?
a) Phosphorus
b) Iron
c) Manganese
d) Copper
Answer: a) Phosphorus
Explanation: Phosphorus is crucial for DNA and RNA synthesis in plants.

19. The deficiency of which nutrient causes “little leaf” symptom?
a) Magnesium
b) Iron
c) Zinc
d) Manganese
Answer: c) Zinc
Explanation: Zinc deficiency can lead to “little leaf” symptoms in plants.

20. Which nutrient is involved in the formation of coenzymes required for cellular respiration?
a) Sulfur
b) Copper
c) Iron
d) Molybdenum
Answer: c) Iron
Explanation: Iron is involved in the formation of coenzymes required for cellular respiration.

21. Which of the following is NOT a mobile nutrient in plants?
a) Nitrogen
b) Potassium
c) Magnesium
d) Iron
Answer: d) Iron
Explanation: Iron is not a mobile nutrient; its deficiency symptoms typically appear in younger leaves.

22. The primary function of sulfur in plants is to:
a) Activate enzymes
b) Enhance chlorophyll synthesis
c) Strengthen cell walls
d) Form amino acids
Answer: d) Form amino acids
Explanation: Sulfur is essential for the formation of amino acids in plants.

23. Which of the following nutrients is a component of the enzyme nitrogenase?
a) Molybdenum
b) Zinc

c) Iron
d) Copper
Answer: a) Molybdenum
Explanation: Molybdenum is a component of the enzyme nitrogenase, which is involved in nitrogen fixation.

24. Which nutrient deficiency causes “tip burn” in plants like lettuce and cabbage?
a) Boron
b) Calcium
c) Magnesium
d) Potassium
Answer: b) Calcium
Explanation: Calcium deficiency can lead to “tip burn” symptoms in plants like lettuce and cabbage.

25. Nitrogen is absorbed by plants in the form of:
a) Nitrate (NO3-)
b) Ammonium (NH4+)
c) Nitrogen gas (N2)
d) All of the above
Answer: d) All of the above
Explanation: Plants can absorb nitrogen in the form of nitrate, ammonium, or nitrogen gas.

26. Which nutrient is essential for the formation of ATP (adenosine triphosphate)?
a) Phosphorus
b) Sulfur
c) Magnesium
d) Potassium
Answer: a) Phosphorus
Explanation: Phosphorus is essential for the formation of ATP in plants.

27. Which of the following nutrients is NOT directly involved in photosynthesis?
a) Carbon
b) Nitrogen
c) Magnesium
d) Iron
Answer: b) Nitrogen
Explanation: While nitrogen is important for overall plant health, it is not directly involved in the photosynthesis process.

28. Which nutrient deficiency leads to “bronzing” of leaves in plants?
a) Iron
b) Manganese
c) Boron
d) Zinc
Answer: b) Manganese
Explanation: Manganese deficiency can cause “bronzing” or discoloration of leaves.

29. What is the main function of copper in plants?
a) Electron transport
b) Nitrogen fixation
c) Stomatal regulation
d) Cell wall synthesis
Answer: a) Electron transport
Explanation: Copper is involved in electron transport within plant cells.

30. Which of the following nutrients is NOT a constituent of chlorophyll?
a) Iron
b) Magnesium
c) Potassium
d) Nitrogen
Answer: c) Potassium
Explanation: Chlorophyll contains magnesium, not potassium.

31. Zinc deficiency in plants can cause the inhibition of:
a) Photosynthesis
b) Respiration
c) Protein synthesis
d) Water uptake
Answer: c) Protein synthesis
Explanation: Zinc deficiency can inhibit protein synthesis in plants.

32. Which nutrient is involved in the synthesis of lignin, a component of cell walls?
a) Calcium
b) Boron
c) Phosphorus
d) Potassium
Answer: b) Boron
Explanation: Boron is involved in the synthesis of lignin, which provides structural support to plant cell walls.

33. Which of the following nutrients is required in the largest quantity by plants?
a) Iron
b) Manganese
c) Nitrogen
d) Zinc
Answer: c) Nitrogen
Explanation: Nitrogen is required in the largest quantity among all mineral nutrients by plants.

34. Magnesium deficiency in plants can lead to:
a) Poor fruit set
b) Yellowing of leaves
c) Stunted growth
d) All of the above
Answer: d) All of the above
Explanation: Magnesium deficiency can cause various symptoms including poor fruit set, yellowing of leaves, and stunted growth.

35. Which nutrient is involved in the activation of enzymes responsible for nitrogen metabolism?
a) Manganese
b) Molybdenum
c) Copper
d) Boron
Answer: b) Molybdenum
Explanation: Molybdenum activates enzymes involved in nitrogen metabolism.

36. Nitrogen is a key component of:
a) Amino acids
b) Chlorophyll
c) ATP
d) All of the above
Answer: d) All of the above
Explanation: Nitrogen is a component of amino acids, chlorophyll, and ATP.

37. Which nutrient is responsible for the activation of enzymes involved in the synthesis of carbohydrates?
a) Iron
b) Zinc
c) Manganese
d) Calcium
Answer: c) Manganese
Explanation: Manganese activates enzymes involved in carbohydrate synthesis.

38. Which of the following nutrients is involved in the synthesis of DNA and RNA in plants?
a) Boron
b) Manganese
c) Phosphorus
d) Zinc
Answer: d) Zinc
Explanation: Zinc is involved in the synthesis of DNA and RNA in plants.

39. Which nutrient deficiency can result in the formation of “club roots” in cruciferous plants?
a) Calcium
b) Iron
c) Manganese
d) Boron
Answer: d) Boron
Explanation: Boron deficiency can lead to the formation of “club roots” in cruciferous plants.

40. Which of the following nutrients is involved in the regulation of osmotic pressure in plant cells?
a) Nitrogen
b) Potassium
c) Phosphorus
d) Magnesium
Answer: b) Potassium
Explanation: Potassium helps regulate osmotic pressure in plant cells.

41. Which nutrient is involved in the activation of enzymes responsible for nitrogen fixation?
a) Molybdenum
b) Zinc
c) Iron
d) Boron
Answer: a) Molybdenum
Explanation: Molybdenum activates enzymes involved in nitrogen fixation.

42. Which of the following nutrients is NOT involved in the synthesis of proteins?
a) Sulfur
b) Phosphorus
c) Iron
d) Copper
Answer: b) Phosphorus
Explanation: While phosphorus is essential for cell division and growth, it is not directly involved in protein synthesis.

43. What is the primary function of manganese in plants?
a) Photosynthesis
b) Water uptake
c) Activation of enzymes
d) Cell wall formation
Answer: c) Activation of enzymes
Explanation: Manganese is primarily involved in the activation of enzymes in plants.

44. Which nutrient is required for the synthesis of chlorophyll and acts as an enzyme activator in plants?
a) Calcium
b) Magnesium
c) Nitrogen
d) Zinc
Answer: b) Magnesium
Explanation: Magnesium is required for chlorophyll synthesis and acts as an enzyme activator in plants.

45. Copper deficiency in plants can lead to:
a) Leaf tip burn
b) Wilting
c) Rosette formation
d) All of the above
Answer: c) Rosette formation
Explanation: Copper deficiency can cause rosette formation in plants.

46. Which nutrient is responsible for the formation

of tubers in potatoes?
a) Potassium
b) Phosphorus
c) Magnesium
d) Nitrogen
Answer: a) Potassium
Explanation: Potassium is involved in the formation of tubers in potatoes.

47. Which of the following nutrients is required for the synthesis of gibberellins, a class of plant hormones?
a) Iron
b) Boron
c) Calcium
d) Zinc
Answer: d) Zinc
Explanation: Zinc is required for the synthesis of gibberellins in plants.

48. Which nutrient deficiency leads to the formation of “little leaf” symptom in citrus plants?
a) Boron
b) Zinc
c) Manganese
d) Iron
Answer: a) Boron
Explanation: Boron deficiency can cause the “little leaf” symptom in citrus plants.

49. Which nutrient is involved in the synthesis of nucleic acids and proteins in plants?
a) Sulfur
b) Magnesium
c) Manganese
d) Nitrogen
Answer: d) Nitrogen
Explanation: Nitrogen is involved in the synthesis of nucleic acids and proteins in plants.

50. Which of the following nutrients is essential for the formation of root nodules in leguminous plants?
a) Calcium
b) Molybdenum
c) Iron
d) Phosphorus
Answer: b) Molybdenum
Explanation: Molybdenum is essential for the formation of root nodules in leguminous plants.

51. Which of the following nutrients is involved in the activation of enzymes responsible for DNA replication?
a) Zinc
b) Manganese
c) Copper
d) Boron
Answer: a) Zinc
Explanation: Zinc is involved in the activation of enzymes responsible for DNA replication in plants.

52. Iron deficiency in plants often results in:
a) Wilting
b) Anthocyanin production
c) Interveinal chlorosis
d) Root rot
Answer: c) Interveinal chlorosis
Explanation: Iron deficiency often leads to interveinal chlorosis in plant leaves.

53. Which nutrient deficiency results in the loss of apical dominance in plants?
a) Potassium
b) Boron
c) Calcium
d) Nitrogen
Answer: b) Boron
Explanation: Boron deficiency can result in the loss of apical dominance in plants.

54. Which nutrient is required for the formation of ribosomes in plant cells?
a) Phosphorus
b) Manganese
c) Iron
d) Zinc
Answer: c) Iron
Explanation: Iron is required for the formation of ribosomes in plant cells.

55. Which of the following nutrients is involved in the metabolism of carbohydrates and proteins in plants?
a) Molybdenum
b) Copper
c) Nitrogen
d) Sulfur
Answer: b) Copper
Explanation: Copper is involved in the metabolism of carbohydrates and proteins in plants.

56. Manganese deficiency in plants can cause:
a) Leaf necrosis
b) Poor seed set
c) Bud abortion
d) All of the above
Answer: d) All of the above
Explanation: Manganese deficiency can cause various symptoms including leaf necrosis, poor seed set, and bud abortion.

57. Which nutrient is involved in the synthesis of auxin, a plant hormone responsible for cell elongation?
a) Zinc
b) Molybdenum
c) Boron
d) Calcium
Answer: c) Boron
Explanation: Boron is involved in the synthesis of auxin, which promotes cell elongation in plants.

58. Which of the following nutrients is required for the activation of enzymes involved in nitrogen assimilation?
a) Potassium
b) Magnesium
c) Molybdenum
d) Zinc
Answer: d) Zinc
Explanation: Zinc is required for the activation of enzymes involved in nitrogen assimilation in plants.

59. Copper is a constituent of which enzyme involved in lignin synthesis?
a) Peroxidase
b) Nitrate reductase
c) ATP synthase
d) Ribulose bisphosphate carboxylase
Answer: a) Peroxidase
Explanation: Copper is a constituent of the enzyme peroxidase, which is involved in lignin synthesis.

60. Which of the following nutrients is involved in the activation of enzymes responsible for phosphate uptake?
a) Iron
b) Magnesium
c) Molybdenum
d) Zinc
Answer: a) Iron
Explanation: Iron is involved in the activation of enzymes responsible for phosphate uptake in plants.

61. Which nutrient is involved in the synthesis of cytokinins, a class of plant hormones?
a) Manganese
b) Boron
c) Zinc
d) Copper
Answer: a) Manganese
Explanation: Manganese is involved in the synthesis of cytokinins in plants.

62. Which nutrient deficiency can result in the formation of “white bud” symptom in grapes?
a) Manganese
b) Zinc
c) Iron
d) Boron
Answer: d) Boron
Explanation: Boron deficiency can cause the “white bud” symptom in grapes.

63. Which of the following nutrients is involved in the synthesis of chlorophyll and nucleic acids?
a) Potassium
b) Molybdenum
c) Magnesium
d) Zinc
Answer: c) Magnesium
Explanation: Magnesium is involved in the synthesis of chlorophyll and nucleic acids.

64. Which nutrient is involved in the synthesis of ethylene, a plant hormone involved in fruit ripening?
a) Calcium
b) Boron
c) Manganese
d) Potassium
Answer: b) Boron
Explanation: Boron is involved in the synthesis of ethylene, which regulates fruit ripening in plants.

65. Which nutrient is essential for the synthesis of chlorophyll and nucleic acids in plants?
a) Iron
b) Manganese
c) Magnesium
d) Copper
Answer: c) Magnesium
Explanation: Magnesium is essential for the synthesis of chlorophyll and nucleic acids in plants.

66. Zinc deficiency in plants can result in the inhibition of:
a) Cell division
b) Water uptake
c) Chlorophyll synthesis
d) All of the above
Answer: d) All of the above
Explanation: Zinc deficiency can inhibit cell division, water uptake, and chlorophyll synthesis in plants.

67. Which nutrient is involved in the synthesis of lignin and helps in the formation of secondary cell walls?
a) Boron
b) Manganese
c) Phosphorus
d) Copper
Answer: a) Boron
Explanation: Boron is involved in lignin synthesis and the formation of secondary cell walls in plants.

68. Which of the following nutrients is involved in the synthesis of glutathione, an antioxidant molecule?
a) Iron
b) Zinc
c) Molybdenum
d) Sulfur
Answer: d) Sulfur
Explanation: Sulfur is involved in the synthesis of glutathione, which acts as an antioxidant in plants.

69. Molybdenum is a cofactor for which enzyme involved in nitrogen metabolism?
a) Nitrate reductase
b) Peroxidase
c) Ribulose bisphosphate carboxylase
d) ATP synthase
Answer: a) Nitrate reductase
Explanation: Molybdenum is a cofactor for nitrate reductase, which is involved in nitrogen metabolism.

70. Which nutrient is involved in the synthesis of gibberellins, a class of plant hormones that promote stem elongation?
a) Iron
b) Magnesium
c) Boron
d) Manganese
Answer: d) Manganese
Explanation: Manganese is involved in the synthesis of gibberellins, which promote stem elongation in plants.

71. Which nutrient deficiency leads to the formation of “rosetting” in cauliflower plants?
a) Iron
b) Boron
c) Magnesium
d) Zinc
Answer: d) Zinc
Explanation: Zinc deficiency can cause “rosetting” or stunted growth in cauliflower plants.

72. Which of the following nutrients is involved in the synthesis of RNA polymerase, an enzyme required for gene expression?
a) Molybdenum
b) Iron
c) Magnesium
d) Copper
Answer: c) Magnesium
Explanation: Magnesium is involved in the synthesis of RNA polymerase, which is required for gene expression.

73. Which nutrient is involved in the activation of enzymes responsible for cell elongation in plants?
a) Boron
b) Zinc
c) Manganese
d) Copper
Answer: a) Boron
Explanation: Boron is involved in the activation of enzymes responsible for cell elongation in plants.

74. Which of the following nutrients is involved in the synthesis of indole-3-acetic acid (IAA), a major auxin in plants?
a) Magnesium
b) Manganese
c) Boron
d) Zinc
Answer: d) Zinc
Explanation: Zinc is involved in the synthesis of indole-3-acetic acid (IAA), a major auxin in plants.

75. Which nutrient deficiency results in the formation of “little leaf” symptom in stone fruits like peach and cherry?
a) Boron
b) Zinc
c) Iron
d) Manganese
Answer: a) Boron
Explanation: Boron deficiency can cause the “little leaf” symptom in stone fruits like peach and cherry.

76. Which nutrient is involved in the synthesis of abscisic acid, a plant hormone involved in stress responses?
a) Boron
b) Magnesium
c) Manganese
d) Sulfur
Answer: b) Magnesium
Explanation: Magnesium is involved in the synthesis of abscisic acid, which regulates stress responses in plants.

77. Which of the following nutrients is involved in the activation of enzymes responsible for phosphate translocation in plants?
a) Iron
b) Zinc
c) Manganese
d) Copper
Answer: c) Manganese
Explanation: Manganese is involved in the activation of enzymes responsible for phosphate translocation in plants.

78. Which nutrient deficiency results in the formation of “bunchy top” symptom in bananas?
a) Molybdenum
b) Zinc
c) Boron
d) Magnesium
Answer: c) Boron
Explanation: Boron deficiency can cause the “bunchy top” symptom in bananas.

79. Copper deficiency in plants can result in the inhibition of:
a) Chlorophyll synthesis
b) Lignin synthesis
c) Nitrate assimilation
d) All of the above
Answer: d) All of the above
Explanation: Copper deficiency can inhibit chlorophyll synthesis, lignin synthesis, and nitrate assimilation in plants.

80. Which nutrient is involved in the activation of enzymes responsible for nitrogen reduction in leguminous plants?
a) Molybdenum
b) Zinc
c) Iron
d) Boron
Answer: a) Molybdenum
Explanation: Molybdenum activates enzymes responsible for nitrogen reduction in leguminous plants.

81. Which of the following nutrients is involved in the synthesis of ascorbic acid (vitamin C) in plants?
a) Manganese
b) Zinc
c) Copper
d) Magnesium
Answer: c) Copper
Explanation: Copper is involved in the synthesis of ascorbic acid (vitamin C) in plants.

82. Zinc is involved in the synthesis of which enzyme required for starch metabolism?
a) Starch synthase
b) Sucrose synthase
c) Amylase
d) Phosphorylase
Answer: a) Starch synthase
Explanation: Zinc is involved in the synthesis of starch synthase, an enzyme required for starch metabolism.

83. Which of the following nutrients is involved in the synthesis of phenolic compounds in plants?
a) Iron
b) Manganese
c) Copper
d) Boron
Answer: a) Iron
Explanation: Iron is involved in the synthesis of phenolic compounds in plants.

84. Zinc deficiency in plants can result in the inhibition of:
a) Cell division
b) Protein synthesis
c) Chlorophyll synthesis
d) All of the above
Answer: d) All of the above
Explanation: Zinc deficiency can inhibit cell division, protein synthesis, and chlorophyll synthesis in plants.

85. Which nutrient is involved in the synthesis of enzymes responsible for lignin polymerization?
a) Zinc
b) Boron
c) Copper
d) Manganese
Answer: d) Manganese
Explanation: Manganese is involved in the synthesis of enzymes responsible for lignin polymerization.

86. Which of the following nutrients is involved in the synthesis of jasmonic acid, a plant hormone involved in defense responses?
a) Molybdenum
b) Magnesium
c) Zinc
d) Sulfur
Answer: a) Molybdenum
Explanation: Molybdenum is involved in the synthesis of jasmonic acid, which regulates defense responses in plants.

87. Copper deficiency in plants can result in the inhibition of:
a) Respiration
b) Photosynthesis
c) Ethylene synthesis
d) All of the above
Answer: d) All of the above
Explanation: Copper deficiency can inhibit respiration, photosynthesis, and ethylene synthesis in plants.

88. Which nutrient is involved in the synthesis of enzymes required for lignin degradation?
a) Boron
b) Manganese
c) Copper
d) Iron
Answer: c) Copper
Explanation: Copper is involved in the synthesis of enzymes required for lignin degradation in plants.

89. Which of the following nutrients is involved in the synthesis of enzymes responsible for carotenoid biosynthesis?
a) Zinc
b) Molybdenum
c) Iron
d) Magnesium
Answer: a) Zinc
Explanation: Zinc is involved in the synthesis of enzymes responsible for carotenoid biosynthesis.

90. Which nutrient deficiency results in the formation of “hollow heart” symptom in potatoes?
a) Boron
b) Zinc
c) Manganese
d) Magnesium
Answer: c) Manganese
Explanation: Manganese deficiency can cause the “hollow heart” symptom in potatoes.

91. Which nutrient is involved in the synthesis of enzymes required for lignin cross-linking?
a) Iron
b) Boron
c) Manganese
d) Copper
Answer: b) Boron
Explanation: Boron is involved in the synthesis of enzymes required for lignin cross-linking in plants.

92. Zinc deficiency in plants can lead to the inhibition of:
a) Chlorophyll synthesis
b) Auxin synthesis
c) Nitrate assimilation

d) All of the above
Answer: d) All of the above
Explanation: Zinc deficiency can inhibit chlorophyll synthesis, auxin synthesis, and nitrate assimilation in plants.

93. Which nutrient is involved in the synthesis of enzymes required for cellulose synthesis?
a) Molybdenum
b) Magnesium
c) Iron
d) Boron
Answer: b) Magnesium
Explanation: Magnesium is involved in the synthesis of enzymes required for cellulose synthesis in plants.

94. Which of the following nutrients is involved in the synthesis of enzymes required for lignin degradation?
a) Manganese
b) Zinc
c) Iron
d) Copper
Answer: d) Copper
Explanation: Copper is involved in the synthesis of enzymes required for lignin degradation in plants.

95. Copper deficiency in plants can result in the inhibition of:
a) Ethylene synthesis
b) Starch metabolism
c) ATP synthesis
d) All of the above
Answer: c) ATP synthesis
Explanation: Copper deficiency can inhibit ATP synthesis in plants.

96. Which nutrient is involved in the synthesis of enzymes required for nitrogen fixation?
a) Iron
b) Zinc
c) Molybdenum
d) Boron
Answer: c) Molybdenum
Explanation: Molybdenum is involved in the synthesis of enzymes required for nitrogen fixation in plants.

97. Which of the following nutrients is involved in the synthesis of enzymes required for lignin polymerization?
a) Boron
b) Magnesium
c) Copper
d) Manganese
Answer: d) Manganese
Explanation: Manganese is involved in the synthesis of enzymes required for lignin polymerization in plants.

98. Zinc is involved in the synthesis of which enzyme required for DNA replication?
a) DNA polymerase
b) RNA polymerase
c) DNA ligase
d) Helicase
Answer: a) DNA polymerase
Explanation: Zinc is involved in the synthesis of DNA polymerase, an enzyme required for DNA replication.

99. Which nutrient is involved in the synthesis of enzymes required for lignin cross-linking?
a) Iron
b) Boron
c) Manganese
d) Copper
Answer: b) Boron
Explanation: Boron is involved in the synthesis of enzymes required for lignin cross-linking in plants.

100. Manganese deficiency in plants can lead to the inhibition of:
a) Photosynthesis
b) Respiration
c) Protein synthesis
d) All of the above
Answer: d) All of the above
Explanation: Manganese deficiency can inhibit photosynthesis, respiration, and protein synthesis in plants.

These 100 questions cover various aspects of mineral nutrition in plants.

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