Final answer:
The macromolecules that act as enzymes to catalyze cell reactions and are made up of carbon, hydrogen, oxygen, and nitrogen are known as proteins.
Step-by-step explanation:
The enzymes that catalyze cell reactions are macromolecules composed of carbon, hydrogen, oxygen, and nitrogen. These types of macromolecules are known as proteins. Proteins, along with carbohydrates, nucleic acids, and lipids, are one of the four major classes of biological macromolecules that perform a wide array of functions within the cell. Enzymes, most of which are proteins, act as catalysts in cellular reactions, including the vital processes of dehydration and hydrolysis reactions that form and break down polymers respectively.