Multiple choice

Abscisic acid (ABA) is one of the most vital plant growth hormones. Which of the following compounds represents the precursor of abscisic acid?

  1. Zeaxanthin

  2. Campesterol

  3. Tryptophan

  4. Furfural

  5. Ent-kaurene

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A Correct answer
Explanation

Zeaxanthin represents the first committed precursor of abscisic acid (ABA).