Some proteins speed up chemical reactions, while other splay a role in defense, storage, transport, cellular communication, movement , or structural support.
Life would not be possible without enzymes, most of which are proteins.
Enzymatic proteins regulate metabolism by acting as a Catalysts, chemical agents that selectively speed up chemical reactions without being consumed by the reactions.
Because an enzyme can preform its function over and over again, these molecules can be thought of as workhorses that keep cells running by carrying out the process of life.
The bonds between amino acids is called a peptide bond, so a polymer of amino acids is called Polypeptide.
A Protein is a biologically functional molecules made up of one or more polypeptides, each folded and coiled into a specific 3-D structure.