Answer:
Each small organic molecule can be a unit of a large organic
molecule called a macromolecule. There are four classes of
macromolecules (polysaccharides or carbohydrates, triglycerides or
lipids, polypeptides or proteins, and nucleic acids such as DNA & RNA).
Carbohydrates and lipids are made of only carbon, hydrogen, and
oxygen (CHO). Proteins are made of carbon, hydrogen, oxygen, and
nitrogen (CHON). Nucleic acids such as DNA and RNA contain carbon,
hydrogen, oxygen, nitrogen, and phosphorus (CHON P).
Explanation:
