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Gaokao Biology Practice Question

2.( 6分)下列关于细胞癌变的叙述,错误的是( )

  1. A.癌细胞在适宜条件时可无限增殖
  2. B.癌变前后,细胞的形态和结构有明显差别
  3. C.病毒癌基因可整合到宿主基因组诱发癌变
  4. D.原癌基因的主要功能是阻止细胞发生异常增殖

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