NEET Biology question

I. Auxin. II. Cytokinin. III. GA. IV. ABA. Which of the above mentioned PGRs are acidic in nature? Choose the correct option accordingly.

(A)I and II
(B)I, III and IVCorrect
(C)I, II and III
(D)I, II, III and IV

Answer: (B)

Solution

Auxins (e.g., indole-3-acetic acid, IAA), gibberellins (e.g., gibberellic acid, GA3 — NCERT explicitly notes *"all gibberellins are acidic"*), and abscisic acid (ABA) are acidic plant hormones, whereas **cytokinins** (such as kinetin and zeatin, which are N6-substituted aminopurines/adenine derivatives) are **basic**

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Question ID VK-114272