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Biology Ch. 2.2
| Term | Definition |
|---|---|
| Energy | the capacity to do work |
| Chemical Reaction | the process by which one or more substances change to produce one or more different substances |
| Reactant | a substance or molecule that participates in a chemical reaction |
| Product | a substance that forms in a chemical reaction |
| Metabolism | the sum of all chemical processes that occur in an organism |
| Activation Energy | the minimum amount of energy required to start a chemical reaction |
| Catalyst | a substance that changes the rate of a chemical reaction without being consumed or changed significantly |
| Enzyme | a type of protein or RNA molecule that speeds up metabolic reactions in plants and animals without being permanently changed or distroyed |
| Redox Reaction | a reaction in which electrons are transferred between atoms; also known as oxidation-reduction reaction |
| Oxidation Reaction | a chemical reaction in which a reactant loses one or more electrons such that the reactant becomes more positive in charge. |
| Reduction Reaction | a chemical change in which electrons are gained, either by the removal of oxygen, the addition of hydrogen or the addition of electrons |
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