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Hormones thyroxine, adrenaline and the pigment melanin are formed from (a) tyrosine (b) proline (c) tryptophan...

Hormones thyroxine, adrenaline and the pigment melanin are formed from

(a) tyrosine

(b) proline

(c) tryptophan

(d) glycine.

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Answer #1

Hormones are protein in nature. They have a very crucual role in the metabolism and other biological functions of the body. Based on their nude of action, hormones are classified into endocrine and exocrine hormones.

Thyroxine is synthesized by the iodification of tyrosine.

Adrenaline is also synthesized from tyrosine with levodopa, dopamine and norepinephrine as intermediates.

Melanin is synthesized from tyrosine with DOPA, DOPA quinone, DOPA chrome as intermediates.

So, the correct answer is option A. Tyrosine.

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