| A | B |
|---|
| Activation Energy | The amount of energy needed to start a chemical reaction |
| Active Site | The area on an enzyme where the substrate fits in shape and chemistry |
| Adenine | A nitrogen-containing compound found in ATP, DNA, and RNA |
| ADP | Adenosine diphosphate; a molecule converted to ATP by the addition of a phosphate |
| Calorie | A unit used to measure the amount of energy food contains |
| Catalyst | A chemical that helps in a chemical reaction, but is not consumed or changed in the reaction |
| Diabetes | A genetic disease in which a person has too much sugar in his or her blood |
| Kinetic Energy | Energy of motion |
| Metabolism | The collection of the chemical reactions that occur in the cell |
| Obesity | A condition of being greatly overweight |
| Pepsin | An enzyme produced in the stomach for digestion |
| Phosphorylation | The addition of a phosphate group to a molecule |
| Potential Energy | Stored energy |
| Saliva | A liquid produced by glands in the mouth that helps in chewing and starts digestion |
| Substrate | A reactant molecule; the molecule on which an enzyme reacts |
