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【单选题】
下列有关基因表达的叙述，不正确的是 [     ]
A.
造成某人的肝细胞与神经细胞形态差异的根本原因是细胞中的mRNA不同
B.
某DNA分子的一条链中A+T为54%，则由该DNA转录的信使RNA中G+C一定占46%
C.
所有细胞中的翻译过程只能发生在核糖体上
D.
HIV的遗传信息传递过程没有转录这一步骤
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