Molecules composed of long chains of amino acids are called proteins.
Proteins are essential macromolecules that play crucial roles in various biological processes. Each protein has a unique sequence of amino acids that determines its specific structure and function. The chains of amino acids fold into specific shapes, enabling proteins to perform their tasks within living organisms, including catalyzing metabolic reactions, replicating DNA, responding to stimuli, and transporting molecules from one location to another. Understanding proteins is fundamental to the fields of biology, medicine, and biochemistry.