Proteins are polymers made out of amino acids. They’re naturally occurring, meaning they’re made by animals, plants, bugs, fungi, and other living things. Amino acids have an amino end and an acid end. In the middle is a C (carbon) with an H (hydrogen) and a side an R.
A monomer is a single molecule that can be joined together with other same molecules to form a polymer. The building blocks of proteins are amino acids, which contain elements such as H,N,O,C, and more. They are the monomers of the proteins. So, the monomer will be the amino acids, and the polymer will be the proteins themselves.