12.下列何種胺基酸在體內會合成黑色素(melanin)?
(A)色胺酸(tryptophan)
(B)麩胺酸(glutamate)
(C)脯胺酸(proline)
(D)酪胺酸(tyrosine)
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統計: A(188), B(22), C(13), D(664), E(0) #3284511
統計: A(188), B(22), C(13), D(664), E(0) #3284511