细胞核(拉丁语:nucleus)是存在拉真核细胞中个封闭式膜状细胞器,内部含有细胞中大多数个遗传物质,也就是DNA。迭些DNA搭多种蛋白质,如组织蛋白复合形成染色质。而染色质拉细胞分裂时,会浓缩形成染色体,其中所含个所有基因合称为核基因组。
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