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- 1. Multiple ChoiceEnzymes will make a reaction go _______ and use ______ energy.faster, lessfaster, moreslower, lessslower, more
- 2. Multiple ChoiceWhich of the following tasks listed below is most associated with enzymes?catalyze chemical reactionsstore genetic informationstore chemical energy in the celldissolve nutrients and minerals
- 3. Multiple ChoiceEnzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?reducing the number of productsreducing the activation energyincreasing the temperature of the cellincreasing the concentration of reactants
- 4. Multiple Choice
Cells can produce over one thousand different enzymes at a time. Enzymes are critical to the metabolism of these cells, but why are so many different enzymes needed?
Cells are completely unable to control what enzymes they produce
The variety of enzymes prevents their actions from being inhibited.
The active site of an enzyme can only bind to a specific substrate.
The products of a reaction are always converted into new enzymes.
- 5. Multiple ChoiceWhich factors can change the shape of an enzyme and thus denatures a enzyme?Excessive heat and changes in pHNothing canExposure to light and soundExposure to bacteria and Amoebas
- 6. Multiple ChoiceEnzymes are composed of what organic molecule?SugarsDNAProteinsFatty Acids
- 7. Multiple ChoiceWhat happens to an enzyme when it is denatured?Activation energy is lowered.It becomes stronger.It loses its shape.Activation energy is raised.
- 8. Multiple ChoiceEvery enzyme has a optimal temperature and pH. True or False?TrueFalse
- 9. Multiple Choice
Enzymes influence chemical reactions in living systems by:
Providing the substrate required for the reaction to occur.
Lowering the activation energy thus affecting the rate at which reactions occur.
Absorbing water released when polymers are formed.
Combining with excess hydrogen to from gaseous wastes.
- 10. Multiple ChoiceThe "lock and key hypothesis" attempts to explain the mechanism of?Vacuole formationPinocytosisSharing of electronsEnzyme are specific to a substrate
- 11. Multiple ChoiceAny substance that is acted upon by an enzyme is called a(n)?CoenzymeSubstrateVitaminPolypeptide
- 12. Multiple Choice
Based on the graph, what temperature does this enzyme work best?15 C40 C30 C - 13. Multiple ChoiceIn the diagram, what is letter A?productsubstrateenzyme-substrate complexactive site
- 14. Multiple ChoiceWhich line represents an enzyme-catalyzed reaction?Line 1Line 2
- 15. Multiple ChoiceIn a chemical reaction, a reactant binds to an enzyme at a region known as thecatalyst.product.substrate.active site.
- 16. Multiple ChoiceSignificantly changing the pH the enzyme is exposed to will cause the enzyme to _____________.increase enzymatic actionfit better with the substratedenatureevaporate
- 17. Multiple ChoiceEnzymes need to be manufactured often because they are used up in the chemical reactions they perform. (True / False)TrueFalse
- 18. Multiple Choice
Enzymes are proteins and are therefore made of which of the following monomers
nucleic acids
monosaccharides
amino acids
fatty acids
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