RE-NEET 2026 Botany Herbicides MCQ Question
Which of the following plant growth regulators is used as herbicide ?
Kinetin
Abscisic acid
Gibberellin
2,4-D
Correct Answer
Detailed Explanation
The correct answer is D) 2,4-D, which is a synthetic auxin used as a herbicide. It mimics natural plant hormones, promoting uncontrolled growth in broadleaf weeds, ultimately leading to their death.
Kinetin, abscisic acid, and gibberellin are primarily involved in growth regulation and stress responses, not herbicidal action. Kinetin promotes cell division, abscisic acid regulates stress responses, and gibberellin stimulates stem elongation and seed germination, making them unsuitable for herbicide use.
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