問題詳情
15.Melanin is the pigment of the hair, skin and iris of the eyes and is synthesized' in melanocytes. Which of
the following amino acids is the precursor of melanin synthesis?
(A) Arginine
(B) Glycine
(C) Histidine
(D) Tryptophan
(E) Tyrosine
參考答案
答案：99
統計：A:1,B:0,C:0,D:0,E:0
難度：計算中