Question

what monomer makes up proteins?
fats
nucleotides
amino acids
lipids

Explanation:

Proteins are macromolecules made up of monomeric units. Amino acids are the building blocks (monomers) that link together via peptide bonds to form proteins. Fats are a type of lipid, nucleotides are monomers of nucleic acids, and lipids are a different class of biomolecules (not monomers of proteins).

Answer:

Amino Acids (the option with "Amino Acids" text, assuming the radio button next to it is the correct choice; since the options are presented as radio buttons, the correct one is the one labeled "Amino Acids")