any agent (physical or environmental) that can induce a genetic mutation or can increase the rate of mutation
造句
However, extent of reduction in antimutagenicity varied with the test strains of S. typhimurium and the kind of mutagens examined. 萃取物抗致突變活性降低之程度因所測試菌株及致突變劑之不同而有所差異。
These flat-ringed planar compounds intercalate with the cells\\\' nucleic acids .and act as frameshift mutagens and carcinogens. 這些平面扁平環形化合物能插入細胞的核酸中并且充當移碼突變劑和致癌劑。