Question

Identify the correct pair of combinations.
(i) Zeatin - adenine derivative - overcoming apical dominance
(ii) $C_2{H}_4$ - indole compound - effective in fruit ripening
(iii) ABA - carotenoid derivative - induction of parthenocarpy
(iv) $G{A}_3$ - terpene - bolting in cabbage

• A. ii, iii
• B. ii, iv
• C. i, iv
• D. iii, iv

Answer 1

The correct option is C i, iv

Gibberellin (GA${}_3$) is a plant hormone which is diterpene chemically. Bolting is the flowering of the plant. It requires either cold condition or the long day. Gibberellin causes bolting in cabbage under normal condition. Abscisic acid is a carotenoid derivative. It stimulates seed dormancy. Auxin hormone is responsible for developing parthenocarpic fruit. Adenine is a precursor of zeatin, a type of cytokinin plant hormone. Cytokinin is responsible for the growth of lateral shoot when apical dominance is inhibited due to decreased concentration of auxin hormone. Ethylene is a gaseous plant hormone. It is a hydrocarbon which stimulates fruit ripening in plants.

Thus, the correct answer is option C.