Question

if protease breaks down proteins, what building block are the proteins broken down to?
nucleotides
glucose
amino acids
fatty acids

Explanation:

Proteins are polymers made of amino acid monomers. Proteases (enzymes that break down proteins) catalyze the hydrolysis of peptide bonds in proteins, resulting in the breakdown of proteins into their constituent amino acids. Nucleotides are the building blocks of nucleic acids (DNA/RNA), glucose is the building block of carbohydrates (like starch, glycogen), and fatty acids are part of the breakdown of lipids. So the correct building block proteins are broken down into by protease is amino acids.

Answer:

amino acids (the option corresponding to "amino acids" should be selected)