NEET 2016 Biology Paper 1

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Question : 78 of 90

Marks: +1, -0

The amino acid Tryptophan is the precursor for the synthesis of :

[NEET 2016 P1]

Cortisol and Cortisone
Melatonin and Serotonin
Thyroxine and Triiodothyronine
Estrogen and Progesterone

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