下列关于基因工程的叙述,错误的是( ) A.目的基因和受体细胞均来自

下列关于基因工程的叙述,错误的是(  )

A.目的基因和受体细胞均来自动植物或微生物

B.限制性核酸内切酶和DNA连接酶是两类常用的工具酶

C.人胰岛素原基因在大肠杆菌中表达的胰岛素原无生物活性

D.载体上的抗性基因有利于筛选含重组DNA的细胞和促进目的基因的表达

答案

【解析】D

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