you know that's interesting, although I doubt I will read it because I have so much to do and read as well, but -- now you got me wondering if DNA and RNA actually die when the flesh dies. What do you think?
DNA & RNA are essential biological macromolecules (macromolecule means ”large molecule“) in each living cell, but DNA & RNA, by themselves are never alive, YoursTrue.
DNA & RNA can persist in the body of a dead organism, but just as tissues decay and decompose, breaking down the proteins in the tissues and cells, so can either nucleic acid. Eventually you cannot test the DNA of any cells, as the nucleic acid breakdown.
DNA can survive for thousands of years, but it depends on the body of being a frozen mummified remains, like some of the frozen mammoths found.
You cannot test DNA or RNA when it become fossilised, where the mineralized tissue parts (eg bones, teeth, exoskeleton remain) in a body becomes rock.