問題詳情
16. ________ are commonly referred to, respectively, as the 21st and 22nd amino acids.
(A) Selenocysteine and pyrrolysine
(B) Adenine and guanine
(C) Thymine and uracil
(D) Hydroxyproline and hydroxylysine
(E) β-Alanine and D-alanine
參考答案
答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)