NEET 2026
- Exam
- NEET
- Year
- 2026
- Subject
- Botany
- Chapter
- Plant - Growth and Development
NEET 2026 · Botany · Plant - Growth and Development
Which of the following plant growth regulators is used as herbicide...
Which of the following plant growth regulators is used as herbicide ?
Options
- AGibberellin
- B2,4-D
- CKinetin
- DAbscisic acid
Correct answer
B. 2,4-D
Step-by-step 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.