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)

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