Biomolecule

A biomolecule is any molecule produced by a living organism. That includes large macromolecules such as proteins, polysaccharides, lipids, and nucleic acids, as well as many smaller molecules. 

Biomolecules are used in biological processes such as cell division, morphogenesis, or development.Bunge M. 1979. Treatise on Basic Philosophy, vol. 4. Ontology II: A World of Systems, p. 61-2. link.

Just four 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. 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

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.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.Banci L ed. 2013. Metallomics and the cell. Dordrecht: Springer. ISBN 978-94-007-5560-4 They act as cofactors, electron donors, at the heart of key biological molecules.

Types of biomolecules
A huge range of biomolecules exist, including:

 Small molecules:
 Lipids, polysaccharides, glycolipids, sterols, glycerolipids
 Vitamins
 Hormones, neurotransmitters
Metabolites
 Monomers, oligomers and polymers:

 Biomonomers  Bio-oligomers  Biopolymers   Covalent bond name between monomers  Amino acids  Oligopeptides  Polypeptides, proteins (hemoglobin...)   Peptide bond Monosaccharides  Oligosaccharides Polysaccharides (cellulose...)  Glycosidic bond Nucleotides  Oligonucleotides Polynucleotides, nucleic acids (DNA, RNA)  Phosphodiester bond

 References 

Category:Biochemistry