sentence: All organic monomers are based on carbon, usually with hydrogen, oxygen and nitrogen.
sentences_before: A 'macromolecule' is a molecule with a large number of atoms. The word is usually used only when describing polymers, molecules which are made up of smaller molecules called monomers.
sentences_after: There are inorganic macromolecules based on other monomers.
concept_name: organic monomer
headings: Macromolecule
categories: Molecular biology Biochemistry