A. Because he is lazy. B. Because he is not alone. C. Because he is too tired to communicate with others. D. Because he wants to keep a secret what he is doin 参考答案:D
第18题: [单项选择]反密码子UAG识别的mRNA上的密码子是______ A. GTC B. ATC C. AUC D. CUA E. CTA 参考答案:D 答案解析:[解析] 按反密码子第1个碱基和密码子第3个碱基配对,反密码子第3个碱基与密码子第1个碱基配对,则tRNA上反密码子UAG识别mRNA上密码子CUA。