A macromolecule made of amino acids is a protein. Lactase, the enzyme that aids in lactose digestion, is the only protein on the list. Sucrose and glucose are carbohydrates. Deoxyribonucleic acid is DNA, a nucleic acid. Triglycerides are a type of lipid.

Note: You can identify an enzyme (which is a protein) by the fact that its name ends in "-ase."

Amino acids are the building blocks of proteins, so when they are put together in a chain, you will get a protein.