問題詳情
26. Nearly all naturally occurring amino acids:
(A) are racemic mixtures.
(B) are achiral.
(C)have the (R) configuration at the a-carbon.
(D) have the (S) configuration at the a-carbon.
(E) have basic side chains.
參考答案
答案：D
難度：非常困難0
統計：A(0),B(0),C(2),D(0),E(0)