What are the basic units of proteins marcomolecules?

they are amino acids

Explanation:

think of a protein like a necklace. Macromolecules (protein is a type of macromolecule) are like necklaces. They are big chains made of lots smaller beads that are bonded together. The smaller beads of proteins are called amino acids. These small beads of any macromolecule are called monomers. Amino acids are a type of monomer. Other types of macromolecules have different types of monomers