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Gaokao Biology Practice Question

1.(6分)细胞凋亡是细胞死亡的一种类型。下列关于人体中细胞凋亡的叙述,正确的是 ()

  1. A.胎儿手的发育过程中不会发生细胞凋亡
  2. B.小肠上皮细胞的自然更新过程中存在细胞凋亡现象
  3. C.清除被病原体感染细胞的过程中不存在细胞凋亡现象
  4. D.细胞凋亡是基因决定的细胞死亡过程,属于细胞坏死

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