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Hormones, thyroxine, adrenaline and the pigment melanin are formed from [1997]
  • a)
    tryptophan
  • b)
    glycine
  • c)
    tyrosine
  • d)
    proline
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Hormones, thyroxine, adrenaline and the pigment melanin are formed fro...
The amino acid glycine forms porphyrin ring in chlorophyll and haeme proteins like haemoglobin. Tryptophan gives rise to plant hormone indole- 3 - acetic acid.
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Hormones, thyroxine, adrenaline and the pigment melanin are formed fro...
Tyrosine is an essential amino acid which readily passes the blood-brain barrier or it is the precursor of many hormones.so these above hormones are formed from tyrosine.
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Community Answer
Hormones, thyroxine, adrenaline and the pigment melanin are formed fro...
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 C. Tyrosine.
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Hormones, thyroxine, adrenaline and the pigment melanin are formed from [1997]a)tryptophanb)glycinec)tyrosined)prolineCorrect answer is option 'C'. Can you explain this answer?
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