44.下列哪一個胺基酸是重要神經傳導物質血清素(serotonin)的前驅物?
(A)酪胺酸(Tyrosine)
(B)苯丙胺酸(Phenylalanine)
(C)絲胺酸(Serine)
(D)色胺酸(Tryptophan)
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統計: A(30), B(8), C(10), D(67), E(0) #1707461
統計: A(30), B(8), C(10), D(67), E(0) #1707461