下列有关生物工程的说法，错误的是（ ）。
正确答案及解析
正确答案
解析
转入抗虫基因的棉花细胞培育成棉花植株需要植物细胞工程技术，利用细胞全能性，A正确。基因诊断的原理是DNA分子杂交，基因治疗一般是引入正常的基因，基因诱变能改变基因，但不一定能使其变成正常基因，故B错误。植物体细胞杂交制备原生质体需纤维素酶，动物细胞培养制备细胞悬浮液所需要的胰蛋白酶，二者所需的酶不相同，故C错误。在微生物的营养中，需要量最大的是碳源，生长因子需要量虽然极小但必须添加，故D错误。
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