Question

Which of the following are correctly matched?
(A) Ethylene - Thinning of cotton, cherry and walnut
(B) ABA - Antagonist to Gibberellic acids
(C) Cytokinin - Speed up the malting process in brewing industry
(D) Auxins - Prevent fruit and leaf drop at early stages
Choose the correct option:

• A. (A), (B) and (D)
• B. (A) and (B)
• C. (B), (C) and (D)
• D. (C) and (D)

Answer 1

Answer: (A)

Ethylene fruit ripening in tomatoes and apples and accelerates abscission in flowers and fruits (thinning of cotton, cherry, walnut). By inducing dormancy, ABA helps seeds to withstand desiccation and other factors unfavourable for growth. In most situations, ABA acts as an antagonist to Gibberellins. Auxins help to prevent fruit and leaf drop at early stages but promote the abscission of older mature leaves and fruits. Gibberellins are used to speed up the malting process in brewing industry.