What are polypeptides composed of?

Polypeptides are indeed composed of amino acids linked by peptide bonds. Amino acids are the building blocks of proteins, and when they undergo a condensation reaction, they form peptide bonds. This process involves the carboxyl group of one amino acid reacting with the amino group of another, resulting in the release of a molecule of water and the formation of a covalent bond. The sequence and arrangement of these amino acids in a polypeptide chain determine the structure and function of the resulting protein. Understanding this relationship is crucial in biochemistry and molecular biology, as proteins play essential roles in various cellular functions and biological processes.