What is the momomer and polymer of proteins?

The monomer of proteins is the amino acid, which consists of a central carbon atom, an amino group, a carboxyl group, and a variable side chain (R group). Proteins themselves are polymers formed by the covalent bonding of amino acids in a specific sequence, creating polypeptide chains that fold into functional three-dimensional structures. These structures are essential for the diverse functions proteins perform in biological systems.