what is small bio molecules

A biomolecule is any molecule that is produced by a living organism, including large macromolecules such as proteins, polysaccharides, lipids, and nucleic acids, as well as small molecules such as primary metabolites, secondary metabolites, and natural products. The small biomolecules also called micromolecules are the biomolecules which have molecular weight less than 1000 Da (Dalton).