In biochemistry, proteins are polymers built from repeating monomer units. What is the monomer of a protein?

• A. Monosaccharide
• B. Nucleotide
• C. Amino acid
• D. Fatty acid

Answer: (C)

Verified step by step guidance

1. Understand that proteins are large biological molecules made up of smaller repeating units called monomers.
2. Recall that the monomers of proteins are the building blocks that link together to form the protein polymer.
3. Identify the common types of biological monomers: monosaccharides (for carbohydrates), nucleotides (for nucleic acids), amino acids (for proteins), and fatty acids (for lipids).
4. Recognize that amino acids are the specific monomers that polymerize through peptide bonds to form proteins.
5. Conclude that the monomer of a protein is an amino acid.