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q4basic - yousmle99

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q4basic - yousmle99
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#1
01-28-2018, 07:21 AM
Which of the following amino acids is a precursor of melatonin?

(A) Tyrosine
(B) Tryptophan
© Histidine
(D) Isoleucine
(E) Phenylalanine
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#2
02-19-2018, 05:19 PM
B. Tryptophan
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