NCIt definition : Type of substance that may be described as a linear sequence of nucleosides typically
linked through phosphate esters.;
NCIt note : Former Definition: A family of macromolecules, composed of various moieties: purines,
pyrimidines, phosphoric acid, and a pentose, either d-ribose or d-deoxyribose. Nucleic
acids as DNA or RNA is found in the chromosomes, nucleoli, mitochondria, and cytoplasm
of all cells, and in viruses. Nucleic acids are the major players in controlling cellular
function and heredity.;