How can enzyme with only two active sites make long chain molecule?

Enzymes with only two active sites can facilitate the formation of long-chain molecules through a process called polymerization, where the enzyme catalyzes the sequential addition of monomer units. Each active site can bind to a substrate and catalyze a reaction that links it to the growing chain. By alternating the binding of different monomers, the enzyme can extend the chain, even with limited active sites. Additionally, the enzyme may undergo conformational changes that allow it to effectively manage the growing substrate chain.