What is Biomolecule?
[[Image:Myoglobin.png|thumb|200px|A representation of the 3D structure of [[myoglobin]], showing [[alpha helix|alpha helices]], represented by ribbons. This protein was the first to have its structure solved by [[X-ray crystallography]] by [[Max Perutz]] and [[John Kendrew]] in 1958, for which they received a [[Nobel Prize in Chemistry]].]] A '''biomolecule''' is any [[molecule]] produced by a living [[organism]]. That includes large [[macromolecule]]s such as [[protein]]s, [[polysaccharide]]s, [[lipid]]s, and [[nucleic acid]]s, as well as many smaller molecules. Biomolecules are used in biological processes such as [[cell division]], [[morphogenesis]], or [[developmental biology|development]].<ref>Bunge M. 1979. ''Treatise on Basic Philosophy'', vol. 4. Ontology II: A World of Systems, p. 61-2. [https://books.google.com/books?id=4hpNzUzH1E4C&pg=PA61 link].</ref> Just four [[chemical element|elements]]—[[oxygen]], [[carbon]], [[hydrogen]], and [[nitrogen]]—make up 96% of the [[human body]]'s mass. But many other elements, such as the various '''biometals''', are also present in small (but vital) amounts.<ref> Alberts B, Johnson A, Lewis J, Raff M, Roberts K, Wlater P 2002. ''Molecular biology of the cell'' (4th ed). New York: Garland Science. pp. 120–1. ISBN 0-8153-3218-1</ref> Biometals are at the heart of many biomolecules. One or two atoms of [[copper]], [[zinc]], [[iron]] or [[manganese]] are in the most important biological molecules.<ref>Maret W 2018. (Arruda MA, ed). Metallomics: the science of biometals and biometalloids. ''Advances in Experimental Medicine and Biology''. Springer International. 1055: 1–20. doi:10.1007/978-3-319-90143-5_1. ISBN 978-3-319-90143-5. PMID 29884959.</ref><ref>Banci L ed. 2013. Metallomics and the cell. Dordrecht: Springer. ISBN 978-94-007-5560-4</ref> They act as cofactors, [[electron donor]]s, at the heart of key biological molecules. ==Types of biomolecules== A huge range of biomolecules exist, including: * Small molecules: ** [[Lipid]]s, [[polysaccharide]]s, [[glyco