The building blocks of protein are called:

• A. Amino Acids
• B. Nucleotides
• C. Monosaccharides
• D. Fatty Acids

Answer: (A)

Proteins are polymers made from amino acids, which are linked together by peptide bonds to form a chain that folds into a functional protein. The specific amino acids and their sequence determine how the protein folds and what job it can perform in the cell. Other molecules have different basic units: nucleotides form nucleic acids like DNA and RNA, monosaccharides make up carbohydrates, and fatty acids are components of lipids. So the building blocks that construct proteins are amino acids.