Hormones thyroxine, adrenaline and the pigment melanin are formed from

(a) tryptophan (b) glycine (c) tyrosine (d) prolline

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1 Answers

The correct option is (c) tyrosine.

Explanation:

Tyrosine is the precursor of : (a) hormone epinephrine (i.e. adrenaline) and thyroid hormones, (b) neurotransmitter dopamine, (c) melanin (the black pigment of skin).

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