問題詳情
69.tMany biomolecules are derived from amino acid precursors. Serotonin and dopamine are synthesized from ____and____ t, respectively.
(A)thistidine； tyrosine
(B)tphenylalanine； tryptophan
(C)ttryptophan； tyrosine
(D)thistidine； tryptophan
(E)ttryptophan； histidine
參考答案
答案：C
統計：A:0,B:0,C:3,D:0,E:0
難度：計算中