AP BIOLOGY

Detailed explanation-1: -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).

Detailed explanation-2: -Macromolecules (carbohydrates, lipids, proteins, and nucleic acids) are large molecules found in our cells. They are also called “organic molecules” because they contain the element carbon in large quantities. All macromolecules also contain the elements hydrogen and oxygen.

Detailed explanation-3: -The four main classes of organic compounds (carbohydrates, lipids, proteins, and nucleic acids) that are essential to the proper functioning of all living things are known as polymers or macromolecules. All of these compounds are built primarily of carbon, hydrogen, and oxygen but in different ratios.

Detailed explanation-4: -Proteins are made of carbon, hydrogen, oxygen, and nitrogen (CHON).