| A | B |
|---|
| element | any substance that cannot be broken down into simpler substances |
| atom | the smallest unit of an element |
| compound | two or more elements that are chemically combined |
| molecule | the smallest unit of most compounds |
| organic compound | a compound that contains carbon |
| inorganic compound | a compound that does NOT contain carbon |
| RNA | Ribonucleic acid; a nucleic acid that plays an important role in the production of proteins |
| protein | a large organic molecule made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur |
| amino acids | small molecules that are linked together chemically to form proteins |
| enzyme | a type of protein that speeds up a chemical reaction in a living thing |
| lipids | energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen |
| nucleic acid | a very large organic molecule made of carbon, oxygen, hydrogen, nitrogen, and phosphorus, that contains instructions that cells need to carry out all the functions of life |
| DNA | Deoxyribonucleic acid; the genetic material that carries information about an organism and is passed from parent to offspring |
| carbohydrate | an energy-rich organic compound, such as sugar or starch, that is made of the elements carbon, hydrogen, and oxygen |
