問題詳情

7. Of the 20 standard amino acids, only____is not optically active. The reason is that its side
chain______.
(A)alanine； is a simple methyl group
(B) glycine； is a hydrogen atom
(C)glycine； is unbranched
(D) lysine； contains only nitrogen
(E) proline； forms a covalent bond with the amino 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