DNA分子经过诱变,某位点上一个正常碱基(设为P)变成了尿嘧啶。

DNA分子经过诱变,某位点上一个正常碱基(设为P)变成了尿嘧啶。该DNA连续复制两次,得到4个子代DNA分子相应位点上的碱基对分别为U-A、A-T、G-C、C-G,推测"P"可能是(    )     

A.胸腺嘧啶      B.胞嘧啶   C.胸腺嘧啶或腺嘌呤       D.胞嘧啶或鸟嘌呤

答案

D


解析:

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