Q32 / 200 · MHT CET - Medical 2026 (23 April Shift 1) · Biology
Identify the INCORRECT statement about gibberellins.
- AIt promotes bolting in beet and cabbage.
- Correct answerBIt causes epinasty of leaves and flowers.
- CIt promotes seed germination in cereals.
- DIt breaks dormancy of seed and hastens germination.
Solution
Gibberellins are plant growth regulators that promote stem elongation, bolting in rosette plants like beet and cabbage, and seed germination by breaking dormancy and stimulating the synthesis of hydrolytic enzymes in cereals.
Epinasty, which is the downward bending of leaves and flowers due to greater growth on the upper side, is primarily caused by ethylene, not gibberellins.
Therefore, the statement that gibberellins cause epinasty of leaves and flowers is incorrect.
Answer: It causes epinasty of leaves and flowers.
Epinasty, which is the downward bending of leaves and flowers due to greater growth on the upper side, is primarily caused by ethylene, not gibberellins.
Therefore, the statement that gibberellins cause epinasty of leaves and flowers is incorrect.
Answer: It causes epinasty of leaves and flowers.
Hence, the correct answer is option: 'B'.