| A | B |
|---|
| Enzyme | A protein that speeds up a chemical reaction by lowering its activation energy. |
| Protein | A substance that makes up the structure and controls the chemical activity of the cell. |
| Carbohydrate | Provides energy for the cell. |
| Nucleic acid | Contains the hereditary information |
| Polysaccharide | A sugar made of monomers of monosaccharides |
| Monosaccharide | A carbohydrate that is a simple sugar. |
| Unsaturated fatty acid | A fatty acid that has at least one carbon to carbon double bond. |
| Saturated fatty acid | A fatty acid that has all single bonds between the carbon atoms. |
| Organic compounds | Compounds that contain the element carbon |
| Acids | Substances that have a pH value below 7 and release H+ into solution. |
| Bases | Substances that have a pH above 7 and release OH+ into solution. |
| Catalyst | A substance that accelerates the rate of a chemical reaction. |
| Solution | A combination of two or more substances that are physically mixed but not chemically combined. |
| Polarity | When a molecule has slightly positive and negative ends |
| Proton | A positive ion in the nucleus of an atom. |
| Neutron | A neutral particle in the nucleus of an atom |
| Electron | A negative ion that is around the outside of the atom. |
| Atomic number | the number of protons an atom has |
| Mass number | The number of protons plus neutrons in an atom |
| Isotope | A atom of a substance that has the same number of protons but different numbers of neutrons. |
