Botany-Growth Regulators
NEET Botany Growth Regulators MCQ Question
Type: MCQ-diagram based-Medium-Class 11
Imagine a diagram illustrating the effects of different plant growth regulators applied to a shoot tip. The diagram shows elongated stem growth in one part and inhibited growth in another. Which growth regulator is most likely responsible for the elongated growth?
A
Gibberellic acid
B
Abscisic acid
C
Ethylene
D
Kinetin
Correct Answer
Option A
Detailed Explanation
Gibberellic acid is known for promoting stem elongation, as observed in the 'bakanae' disease of rice seedlings, while other regulators like abscisic acid and ethylene often inhibit growth.
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