Q13 / 180 · NEET 2026 (Re-NEET) · Botany
Which of the following plant growth regulators is used as herbicide ?
- AGibberellin
- Correct answerB2,4-D
- CKinetin
- DAbscisic acid
Solution
Plant growth regulators have various physiological functions in plants.
2,4-D (2,4-Dichlorophenoxyacetic acid) is a synthetic auxin. It is widely used as a herbicide to kill broad-leaved dicotyledonous weeds in cereal crops and lawns, as it does not affect mature monocotyledonous plants.
Gibberellins are used to promote stem elongation and seed germination.
Kinetin is a cytokinin that promotes cell division.
Abscisic acid is a stress hormone that inhibits growth and promotes seed dormancy.
2,4-D (2,4-Dichlorophenoxyacetic acid) is a synthetic auxin. It is widely used as a herbicide to kill broad-leaved dicotyledonous weeds in cereal crops and lawns, as it does not affect mature monocotyledonous plants.
Gibberellins are used to promote stem elongation and seed germination.
Kinetin is a cytokinin that promotes cell division.
Abscisic acid is a stress hormone that inhibits growth and promotes seed dormancy.
Hence, the correct answer is option: 'B'.