問題詳情
3. The difference between cysteine and homocysteine is the same as between serine andhomoserine. This change from the common amino acid is:
(A) one additional carboxyl group
(B) one additional methylene (-CH2-) bridge
(C) two additional amine groups
(D) presence of a ring system
參考答案
答案：B
難度：計算中-1
書單：沒有書單，新增