| Term | Definition |
|---|
| What is a chemical reaction? | A process that changes one set of chemicals into another set of chemicals |
| What are reactants? | The elements or compounds that enter into a chemical reaction |
| What are products? | The elements or compounds produced by a chemical reaction |
| _____always involve the breaking of bonds in reactants and the formation of new bonds in products | Chemical reactions |
| Chemical reactions that release energy often occur_____ | spontaneously |
| Chemical reactions that absorb energy will not occur without a source of ____ | energy |
| What is activation energy? | The energy that is needed to get a reaction started |
| What is a catylyst? | A substance that speeds up the rate of a chemical reaction |
| What are enzymes? | Proteins that act as biological catalysts |
| ____speed up chemical reactions that take place in cells. | Enzymes |
| What are substrates? | The reactants of enzyme-catalyzed reactions |
| What happens to chemical bonds during chemical reactions? | Bonds are broken in reactants and new bonds are formed in products |
| What is the relationship between an enzyme and a catalyst? | An enzyme is a biological catalyst |
| What are some possible factors that may influence enzyme activity? | pH, temperature, proteins in cells that help turn enzymes "on" and "off" |
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