If amino acids are the monomers, what are the polymers?

Amino acids serve as the building blocks, or monomers, of proteins. When these amino acids link together through peptide bonds, they form long chains known as polypeptides. These polypeptides can further fold into complex three-dimensional structures to create functional proteins, which play critical roles in various biological processes.

While carbohydrates, nucleic acids, and fatty acids are also important biomolecules, they are not polymers formed from amino acids. Carbohydrates are made up of sugar monomers, nucleic acids are composed of nucleotide monomers, and fatty acids are the building blocks of lipids. Thus, polypeptides are the correct answer, as they are the direct result of amino acid polymerization.