Question 91
Which nutrient is associated with the development of flower and fruit structures?
A) Manganese
B) Nitrogen
C) Boron
D) Calcium
Correct Answer: C) Boron
Explanation: Boron is crucial for proper flower and fruit development, impacting fertilization and seed set.
Question 92
What is the result of excess phosphorus in the soil?
A) Improved nitrogen fixation
B) Toxicity to plants
C) Reduced iron availability
D) Enhanced root growth
Correct Answer: C) Reduced iron availability
Explanation: Excess phosphorus can inhibit iron uptake, leading to iron deficiency symptoms in plants.
Question 93
Which nutrient is involved in the synthesis of certain plant hormones?
A) Copper
B) Zinc
C) Boron
D) Magnesium
Correct Answer: C) Boron
Explanation: Boron is essential for the synthesis of plant hormones, particularly auxins, affecting growth and development.
Question 94
What deficiency can lead to “root rot” in plants?
A) Calcium
B) Phosphorus
C) Potassium
D) Nitrogen
Correct Answer: A) Calcium
Explanation: Calcium deficiency can weaken root structures, making them more susceptible to rot and disease.
Question 95
Which nutrient is essential for the activation of enzymes involved in photosynthesis?
A) Magnesium
B) Iron
C) Manganese
D) Boron
Correct Answer: A) Magnesium
Explanation: Magnesium is vital for the activation of enzymes that facilitate the photosynthetic process.
Question 96
Which micronutrient is known to be involved in chlorophyll synthesis?
A) Zinc
B) Iron
C) Molybdenum
D) Copper
Correct Answer: B) Iron
Explanation: Iron is essential for chlorophyll synthesis, influencing the green color and photosynthetic capability of leaves.
Question 97
What role does potassium play in plant health during drought conditions?
A) Enhances photosynthesis
B) Improves nutrient uptake
C) Regulates stomatal opening
D) Promotes root elongation
Correct Answer: C) Regulates stomatal opening
Explanation: Potassium helps control stomatal opening, which is critical for regulating water loss during drought.
Question 98
A deficiency in which nutrient can lead to reduced chlorophyll production and yellowing leaves?
A) Nitrogen
B) Iron
C) Magnesium
D) Calcium
Correct Answer: B) Iron
Explanation: Iron deficiency directly impacts chlorophyll production, resulting in yellowing of the leaves.
Question 99
Which nutrient is particularly important for the formation of the structure of cell walls?
A) Nitrogen
B) Calcium
C) Potassium
D) Phosphorus
Correct Answer: B) Calcium
Explanation: Calcium is vital for maintaining cell wall structure and stability, playing a role in cell division and growth.
Question 100
What is the primary role of zinc in plant growth?
A) Energy production
B) Synthesis of proteins
C) Hormonal regulation
D) Enzyme activation
Correct Answer: D) Enzyme activation
Explanation: Zinc is crucial for activating various enzymes that are involved in many metabolic processes within plants
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