A polymer composed of amino acid monomers is called a protein.
Proteins are essential macromolecules that perform a vast array of functions within living organisms. They are made up of long chains of amino acids, which are the building blocks of proteins. The particular sequence and composition of these amino acids determine the structure and function of each protein.
Proteins play critical roles in biological processes, serving as enzymes to accelerate chemical reactions, providing structure and support to cells and tissues, aiding in transportation of molecules, and regulating various functions as hormones and antibodies.