The general name for the kinds of chemical reactions that join smaller molecules to form macromolecules is called polymerization.
Polymerization is the process where small units known as monomers chemically bond together to form larger, more complex structures called polymers or macromolecules. These reactions are essential in the formation of various biological macromolecules such as proteins, nucleic acids, and polysaccharides. Depending on the specific mechanism and conditions, polymerization can occur through different methods, such as addition or condensation reactions.