Question

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

• A. Abscisic acid
• B. Indole butyric acid
• C. Indole-3-acetic acid
• D. Gibberellic acid

Answer 1

The correct option is A Abscisic acid

1. Chemically, Abscisic acid is a 15-C terpenoid compound (sesquiterpene) derived from the terminal part of the carotenoid precursor.

2. Indore butyric acid is not a naturally occurring but a synthetic auxin.

3. Indole-3-acetic acid is derived from the amino acid tryptophan.

4. Gibberellic acid is a tetracylic diterpenoids consisting of 4 isoprene units (C5H8).

So, the correct option is 'Abscisic acid'.