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  3. 32 Genetic engineering may be defined asA the altering of normal cell reproduc

32 Genetic engineering may be defined asA the altering of normal cell reproduc

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问题
32 Genetic engineering may be defined as
选项 A the altering of normal cell reproduction.
B a branch of applied chemistry.
C a procedure that holds tittle promise.
D a study on life-saving enzymes.
答案A
解析本文介绍的是遗传工程，第一段后半部分说到，对DNA的了解导致了对正常细胞繁 殖的改造，并由此进行了一些实验，可见遗传工程就是“对正常的细胞繁殖进行改造”。
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