問題詳情
70.tSeveral nucleotide bases undergo spontaneous loss of their exocyclic amino groups (deamination). Deamination of the nucleotide bases cytosine and 5-methylcytosine yields nucleotide bases:
(A)thypoxanthine and xantitine, respectively.
(B)turacil and thymine, respectively.
(C)turacil only.
(D)turacil and hypoxanthine, respectively.
(E)tthymine and uracil, respectively.
參考答案
答案：B
統計：A:0,B:2,C:0,D:0,E:0
難度：計算中