What do a human, a rose, and a bacterium have in common? Each of these things — along with every other organism on Earth — contains the molecular instructions for life, called deoxyribonucleic ...

Later it was found that the sugar in nucleic acid can be ribose or deoxyribose, giving two forms: RNA and DNA. In 1943, American Oswald Avery proved that DNA carries genetic information.

DNA is a linear biopolymer, a compound biomolecule in the form of a double helix. Polymers are made of monomers, and in DNA, ...

and H4 form a discrete protein octamer, which is fully consistent with the presence of a repeating histone-containing unit in the chromatin fiber. The packaging of DNA into nucleosomes shortens ...