Answer the following question given this paragraph: Proteins are nutrients made up of smaller molecules called amino acids. The digestive system breaks down proteins in food to amino acids, which are used for protein synthesis. Proteins synthesized from the amino acids in food serve many vital functions. They make up muscles, control body processes, fight infections, and carry substances in the blood. Q: What is the name of the smaller molecules that make up proteins? Choices: - fundamental acids - DNA acids - rna acids - amino acids A:
amino acids