isoprenoid metabolic process isoprenoid biosynthetic process isoprenoid anabolism polyisoprenoid formation polyterpene biosynthesis GO:0009241 isoprenoid synthesis polyterpene biosynthetic process polyisoprenoid synthesis MetaCyc:POLYISOPRENSYN-PWY isoprenoid formation biological_process GO:0008299 polyisoprenoid anabolism polyisoprenoid biosynthesis The chemical reactions and pathways resulting in the formation of an isoprenoid compound, isoprene (2-methylbuta-1,3-diene) or compounds containing or derived from linked isoprene (3-methyl-2-butenylene) residues. polyisoprenoid biosynthetic process isoprenoid biosynthesis lipid biosynthetic process