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Gaokao Biology Practice Question

下列有关细胞膜的叙述,正确的是

  1. A.细胞膜两侧的离子浓度差是通过自由扩散实现的
  2. B.细胞膜与线粒体膜、核膜中所含蛋白质的功能相同
  3. C.分泌蛋白分泌到细胞外的过程存在膜脂的流动现象
  4. D.膜中的磷脂分子是由胆固醇、脂肪酸和磷酸组成的

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