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Question

Hormones thyroxine, adrenaline and the pigment melanin are formed from?


A

Proline

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B

Tyrosine

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C

Glycine

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D

Tryptophan

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Solution

The correct option is B

Tyrosine


The correct solution is option B.

Explanation for correct option:

  1. The amino acid tyrosine acts as a precursor for hormones thyroxine, adrenaline, and melanin.
  2. Tyrosine is a non-essential amino acid.

Explanation for incorrect option:

Option A:

  1. Proline maintains mammalian collagen synthesis.

Option C:

  1. Glycine is a precursor for creatinine and glutathione.

Option D:

  1. Tryptophan is a precursor for the monoaminergic neurotransmitter serotonin.

Final answer: Hormones thyroxine, adrenaline, and the pigment melanin are formed from Tyrosine.


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