| A | B |
|---|
| element | any substance that cannot be broken down into simpler substances |
| atom | smallest unit of an element |
| compound | when two or more elements combine chemically |
| molecule | smallest unit of most compounds |
| organic compounds | compounds that contain carbon |
| inorganic compounds | compounds that do not contain carbon |
| carbohydrate | energy-rich organic compound made of the elements, carbon, hydrogen, and oxygen |
| proteins | large organic molecules made of carbon, hydrogen, oxygen, nitrogen, and sulfur |
| amino acids | smaller molecules that make of protein molecules |
| enzyme | type of protein that speeds up a chemical reaction in a living thing |
| lipids | fats, oils, and waxes |
| nucleic acids | large organic molecules made of carbon, oxygen, hydrogen, nitrogen, and phosphorus |
| DNA | genetic material that carries information about an organism that is passed from parent to offspring |
| RNA | plays an important role in the production of proteins and is found in the cytoplams and nucleus |
