How do free radicals from carcinogens affect dna in cells?

By definition, free radicals are any molecular specie capable of independent existence that contains an unpaired electron in an atomic orbital.

Explanation: Free radicals are highly reactive species, capable in the nucleus and in the membrane of cells of damaging biologically relevant molecules such as DNA, proteins, carbohydrates, and lipids.

Mutagenesis through oxidative DNA damage is a frequent event in a normal human cell. Oxygen Free Radicals (OFR) plays an important role in the expansion of tumor clones. OFR attack the deoxyribosyl backbone of DNA. Endogenous DNA lesions are genotoxic and induce mutations. This lesions are relatively formed and is mutagenic, therefore, a potential biomaker of carcenogenesis.

you have to draw the persons position over there

i dont think you are wrong for wanting to get even with someone who did you wrong.

(i'm an eye for an eye kind of person) but if this person hurt you in a sexual way, i dont suggest doing anything to him. he should be taken to the proper authorities, you could go to jail depending on what you do. if it was something small like your sibling took your spot on the couch, than yea, i would get even with him by taking one of his favorite snacks lol. but i dont suggest you doing anything illegal.