Question

which type of macromolecule is made up of subunits that are called amino acids?
carbohydrate
lipid
nucleic acid
protein

Explanation:

Macromolecules are large molecules. Carbohydrates are made of monosaccharides (like glucose). Lipids are made of fatty acids and glycerol. Nucleic acids (like DNA and RNA) are made of nucleotides. Proteins are polymers, and their subunits are amino acids. Amino acids link via peptide bonds to form polypeptides (proteins).

Answer:

protein