A<unk>  is a macromolecule composed of nucleotide chains. In biochemistry these molecules carry genetic information or form structures within cells. The most common<unk> s are deoxyribonucleic<unk>  (DNA) and ribonucleic<unk>  (RNA).<unk> s are universal in living things, as they are found in all cells. They are also found in viruses.
Artificial<unk> s include peptide<unk>  (PNA), Morpholino and locked<unk>  (LNA), as well as glycol<unk>  (GNA) and threose<unk>  (TNA). Each of these is distinguished from naturally-occurring DNA or RNA by changes to the backbone of the molecule.
Nucleic acid
DNA
Nucleoside
Glycolipid
Capsid
Phospholipid
Polyphosphate
Biomolecule