macromolecule biosynthetic process cellular macromolecule biosynthetic process cellular biopolymer biosynthetic process GO:0034961 The chemical reactions and pathways resulting in the formation of a macromolecule, any molecule of high relative molecular mass, the structure of which essentially comprises the multiple repetition of units derived, actually or conceptually, from molecules of low relative molecular mass, carried out by individual cells. cellular macromolecule anabolism cellular macromolecule biosynthesis GO:0034645 biological_process cellular macromolecule synthesis cellular macromolecule formation cellular biosynthetic process cellular macromolecule metabolic process