Formation of macromolecules from smaller building block molecules represents another level in the hierarchy of biological organization. Nucleic acids Most polymerization reactions in living organisms are condensation reactions. Chemical reactions that link two or more small molecules to form larger molecules with repeating structural units. Polymerization reactions during which monomers are covalently linked, producing net removal of a water molecule for each covalent linkage.
Process requires energy.
Process requires biological catalysts or enzymes. A hydrogen from the water bonds to one monomer, and the hydroxyl bonds to the adjacent monomer. Monomers or building block molecules are simple sugars called monosaccharides . Polymers are formed by condensation reactions. Their carbon skeletons are raw material for other organic molecules.