紫外线光量子损伤细胞后,各种结构水平的细胞都具有对自身的 DNA 损伤得到修复的某种能力。修复能力是由遗传控制的,但也受到细胞生理状态的某些影响。这就是说,在一种生理状态下的前突变损伤(如嘧啶二聚物),能够在碱基转换或其他变化之前得到修复;而在其他的一些条件下,则能够在修复机理发生作用之前就进行 DNA 复制,结果突变便可以固定下来。Evelyn After ultraviolet light quantum damages cells, cells of various structural levels have some ability to repair their own DNA damage. Repair ability is genetically controlled, but it is also affected by some of the physiological state of the cells. This means that pre-mutation damage (such as pyrimidine dimers) in a physiological state can be repaired before base conversion or other changes; in other conditions, it can precede the repair mechanism As soon as the DNA is copied, the mutation can be fixed. Evelyn