IAA and serotonin are derived formed from which of the following

IAA and serotonin are derived (formed) from which of the following

Options

(a) Tryptophan
(b) Tyrosine
(c) Phenylalanine
(d) None of these

Correct Answer:

Tryptophan

Explanation:

Natural auxins are synthesized in physiologically active parts of plants such as shoot apices, leaf primordial and developing seeds, bud, embryos from amino acid tryptophan.

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