In biochemistry, what is the monomer (basic building block) of proteins?

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

Answer: (B)

Verified step by step guidance

1. Understand that proteins are large biomolecules made up of smaller units called monomers.
2. Recall that the monomers of proteins are the building blocks that link together to form polypeptide chains.
3. Identify the four options given: Fatty acid, Amino acid, Monosaccharide, and Nucleotide.
4. Recognize that fatty acids are the monomers of lipids, monosaccharides are the monomers of carbohydrates, and nucleotides are the monomers of nucleic acids.
5. Conclude that amino acids are the monomers that combine through peptide bonds to form proteins.