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Chapter 2.4
| Question | Answer |
|---|---|
| A process that changes or transforms one set of chemicals into another | Chemical Reaction |
| The elements or compounds that ENTER into (or begin) a chemical reaction | Reactants |
| The elements or compounds that are PRODUCED BY ( result from) a chemical reaction | P roducts |
| Chemical reactions ______ involve changes in chemical bonds that join atoms in compounds | Always |
| Energy may either be _____ or ______ by chemical reations | Released or absorbed |
| If the reactants have MORE energy than the products the energy is RELEASED also known as a ____ reaction | Exothermic |
| If the reactants have LESS energy than the products then the energy is ABSORBED also known as a _____ reaction | Endothermic |
| The energy needed to get a chemical reaction started | Activation energy |
| Chemical reactions that release energy often occur | spontaneously |
| Chemical reactions that absorb energy | will not occur without a source of energy |
| In REVERSIBLE reactions, one direction will ___ energy, and the other direction will ___ energy | produce,require |
| A substance that speeds up the rate of a chemical reaction | Catalyst |
| A catalyst does this by | lowering a reactions activation energy |
| Enzymes are proteins that act as _____ | biological catalysts |
| Ezymes ____ that take place in cells | speed up chemical reations |
| Enzymes work by creating an ideal ______ such as ___, _____ | environment for the reaction to take place; proximity,orientation |
| This____ the energy needed for the reaction to take place | reduces |
| The reactants of enzyme-catalyzed reactions are known as | substrates |
| substrates bind to a specific location on the enzyme known as the ______ . This association is known as the ______. | active site, enzyme substrate complex |
| The fit between substrate and active site is so precise that is frequently compared to a | lock and key |
| It is the _____ of these large enzyme molecules that allows them to function | shape |
| Changes in ____ or _____ can cause changes in an _________ that can _____ its effectiveness as a _____ | pH, temperature, enzyme's shape, reduce, catalyst |
| ____ has more energy than _____ | Products , Reactants |
Created by:
lespar18
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