What kind of biomolecule is an enzyme?

Enzymes

1. Enzymes are mostly tertiary or quaternary structures of proteins, composed of covalently linked amino acid residues.
2. Thus all enzymes are proteins except for ribozyme, which is an example of a non-proteinaceous enzyme.
3. Enzymes act as biological catalysts that assist in product formation after binding to the substrate.
4. All enzymes have a functional catalytic group that is responsible for their reactivity.
5. Examples: Chymotrypsin, Hexokinase