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【单选题】
对下列有关生物学叙述, 不正确 的是 [ ]A.
细胞分化的主要标志首先是细胞内开始合成新的特异性蛋白质
B.
在脂肪的鉴定实验中,观察被染成橘黄色或者红色的脂肪滴需用显微镜
C.
探究pH对酶活性影响的实验,将酶和反应物混合后放置在不同的pH条件下处理
D.
正常细胞转变为癌细胞的过程中,一般不改变基因表达的过程
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