Q. Which plant hormone is known to delay senescence in leaves? (2022)
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A.
Gibberellins
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B.
Cytokinins
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C.
Ethylene
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D.
Abscisic acid
Solution
Cytokinins are known to delay senescence and promote cell division in plants.
Correct Answer: B — Cytokinins
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Q. Which plant hormone is known to promote fruit ripening? (2022)
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A.
Auxins
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B.
Cytokinins
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C.
Ethylene
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D.
Gibberellins
Solution
Ethylene is the hormone that promotes fruit ripening and is also involved in the senescence of leaves.
Correct Answer: C — Ethylene
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Q. Which plant hormone is primarily associated with apical dominance? (2023)
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A.
Auxins
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B.
Cytokinins
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C.
Gibberellins
-
D.
Ethylene
Solution
Auxins are responsible for apical dominance, suppressing the growth of lateral buds.
Correct Answer: A — Auxins
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Q. Which plant hormone is primarily involved in apical dominance? (2023)
-
A.
Auxins
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B.
Cytokinins
-
C.
Gibberellins
-
D.
Ethylene
Solution
Auxins are primarily responsible for apical dominance, suppressing the growth of lateral buds.
Correct Answer: A — Auxins
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Q. Which plant hormone is primarily involved in the elongation of stems? (2023)
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A.
Ethylene
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B.
Gibberellins
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C.
Cytokinins
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D.
Abscisic acid
Solution
Gibberellins are primarily responsible for stem elongation by promoting cell division and elongation.
Correct Answer: B — Gibberellins
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Q. Which plant hormone is primarily involved in the response to light? (2022)
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A.
Auxins
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B.
Ethylene
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C.
Gibberellins
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D.
Abscisic acid
Solution
Auxins are primarily involved in the plant's response to light, promoting growth towards the light source.
Correct Answer: A — Auxins
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Q. Which plant hormone is primarily responsible for apical dominance? (2023)
-
A.
Auxins
-
B.
Cytokinins
-
C.
Gibberellins
-
D.
Ethylene
Solution
Auxins are responsible for apical dominance, inhibiting the growth of lateral buds.
Correct Answer: A — Auxins
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