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5
Enzymes
| Question | Answer |
|---|---|
| 1. A chemical reaction is a process that | changes one set of chemicals into another set of chemicals. |
| 2. Reactants | the elements or compounds that that enter into a chemical reaction |
| 3. Products | the elements or compounds produced by a chemical reaction. |
| 4. Chemical reactions always involve changes in chemical _________ that join ______ in compounds. | bonds, atoms |
| 5. Energy is ____________ or ___________ whenever chemical bonds form or are _________. | released, absorbed, broken |
| 6. Chemical reactions that release energy often occur __________________ | spontaneously |
| 7. Chemical reactions that absorb energy will not occur without a ______________ of energy. | source |
| 8. In order to stay alive, organisms need to | carry out reactions that require energy. |
| 9. Because __________ and energy are conserved in chemical reactions, every organism must have a source of __________ to carry out chemical ____________. | matter, energy, reactions |
| 10. Get energy from sun | Plants |
| 11. Get energy from consuming plants or other animals | Animals |
| 12. Activation energy | the energy that is needed to get a reaction started |
| 13. Activation energy is a _________ in whether the overall chemical reaction releases energy, or _________ energy | factor, absorbs |
| 14. Catalyst | a substance that speeds up the rate of chemical reactions. |
| 15. Catalysts work by | lowering a reaction's activation energy |
| 16. Enzymes are | proteins that act as biological catalysts |
| 17. Enzymes (speed up/slow down) chemical reactions that take place in cells. | Speed up |
| 18. Enzymes act by | lowering the activation energy |
| 19. For a chemical reaction to take place, the | reactants must collide with enough energy so that existing bonds will be broken and new bonds formed. |
| 20. Enzymes provide a __________ where reactants can be brought together to react, reducing the ________ needed for reaction. | site, energy |
| 21. Substrates are | the raectants of enzyme catalyzed reactions |
| 22. The fit is so preceice that the active site and substrates are often compared to a | lock and key |
| 23. The products of the reaction are _______ and the __________ is free to start the process over again. | released, enzyme |
| 24. Enzymes can be affected by any _______________ that influences a chemical reaction. | variable |
| 25. Enzymes work best at certain ________ values. | pH |
Created by:
kyliew2014
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