問題詳情
7. The difference between serine and homoserine is the same as between cysteine and homocysteine.This change from the common amino acid is:
(A)one additional -CH2- group.
(B) one additional -COOH group.
(C)two additional -NH2 groups.
(D) presence of a ring system.
(E)one additional -NH2 group.
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增