What is the basic structure of a protein composed of?

The basic structure of a protein is composed of long chains of amino acids. Proteins are made up of polypeptides, which are formed by the linkage of amino acids through peptide bonds. Each amino acid has a specific side chain that determines its unique properties, and they are arranged in a specific sequence dictated by the genetic code. This sequence ultimately determines the protein's structure and function.

Proteins play crucial roles in the body, including serving as enzymes, structural components, signaling molecules, and transporters. The unique sequence and composition of amino acids allow for the vast diversity of protein structures and functions necessary for life. Thus, understanding that proteins are built from amino acid chains is fundamental in biology and biochemistry.