Which type of macromolecule is made up of subunits that are called amino acids?

Proteins are the type of macromolecule made up of subunits called amino acids. These amino acids link together through peptide bonds to form polypeptides, which then fold into specific three-dimensional structures to perform various biological functions. Proteins play crucial roles in the body, including catalyzing metabolic reactions, providing structural support, and facilitating communication between cells.