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DNA是细胞生存、遗传的物质基础。电离辐射能够破坏DNA的分子结构,导致链的断裂。一般认为细胞受电离辐射或化学物质作用后DNA损伤的修复能力是维持遗传完整性的基础。如果细胞内有几个DNA断
DNA is the material basis for cell survival and inheritance. Ionizing radiation can destroy the molecular structure of DNA and cause strand breaks. It is generally believed that the ability of cells to repair DNA damage after exposure to ionizing radiation or chemicals is the basis for maintaining genetic integrity. If there are several DNA breaks inside the cell