NEET Biology Plant Growth And Development Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

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Plant Growth And Development Topic Based

Question & Answer Discuss:

Which one of the following acids is a derivative of carotenoids?

(a) Gibberellic acid

(b) Indole-3-acetic acid

(c) Abscisic acid

(d) Indole butyric acid

Answer: (c)

Biosynthesis of abscisic acid (ABA) in most plants occur indirectly by degradation of certain carotenoids present in chloroplasts or other plastids. The biosynthetic pathway follow mevalonic acid pathway for their synthesis. The sites of synthesis are fruits, tissues, leaves, roots and seeds.

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