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- 1. Multiple Choice
Enzymes are composed of which macromolecule.lipidsprotein - 2. Multiple ChoiceSome bacteria live in hot springs. Their cells contain enzymes that function best at temperatures of 70 °C or higher. At the temperature of 50 °C, how will the enzymes in these bacterial cells most likely be affected?
Enzymes work best at an optimal temperature.The enzymes will lose their bond structure and fall apartThe enzymes will not increase the rate of reactions as much as they would at 70 °C. - 3. Multiple ChoiceWhat is the relationship between enzymes and activation energy?When an enzyme catalyzes a reaction, it decreases the activation energy of the reaction.When an enzyme catalyzes a reaction, it does not affect the activation energy of the reaction.
- 4. Multiple ChoiceMeat tenderizer contains an enzyme that breaks down meat. If meat is coated with tenderizer and then placed in a refrigerator, how would the enzyme be affected? Temperature can effect how an enzyme worksIt would break down the meat more slowlyIt would change the shape of the meat.
- 5. Multiple ChoiceIf the enzyme has a pH ranging from 7 to 9 what effect would a pH of 3 have on the enzyme?
Enzymes work best at an optimal temperature and pHmake it inactiveno change - 6. Multiple ChoiceThe graph shows how the activity of an enzyme changes over a range of pH values. Which of the following conclusions can be drawn from this graph?pepsin works best at a pH near 2pepsin works best at a pH of 9
- 7. Multiple ChoiceThe diagram below illustrates a biochemical process that occurs in organisms. What is another name for the substance labeled "catalyst"?EnzymeAntibody
- 8. Multiple ChoiceThe human body maintains a temperature of around 98.6 degrees at all times. Enzymes are involved in almost every chemical reaction in the body. Which of the following describes the connection between these two statements?The body is kept relatively warm to prevent too much enzyme actionEnzymes function best at a specific temperature.
- 9. Multiple ChoiceWhich of the following best explains why enzymes are necessary for many cellular reactions?
Enzymes speed up reactionsThe reactions are too slow to meet the needs of the cell if enzymes are missing.The reactions take up too much space in the cell if the enzymes are missing. - 10. Multiple ChoiceEnzymes interact with the substrate at theactive siteproduct
- 11. Multiple ChoiceEnzymes can break down the substrate starch into newproductsenzymes
- 12. Multiple ChoiceEnzymes are specific and often are compared to the interaction between a -lock and keylock and chanin
- 13. Multiple ChoiceEnzyme -_______________ the activation energy required for a reaction.lower, decreaseraise, increase
- 14. Multiple ChoiceWhat is the optimal temperature for the enzyme reaction shown? ____'c10204060
- 15. Multiple ChoiceThe following enzyme has been altered by a change in pH or temperature and is said to be -denaturederadicated
- 16. Multiple Choice
Enzymes lower activation energy required.
True
False
- 17. Multiple Choice
Select all the statement/terms that are associated with enzymes.
Protein
Catalyst
Lower Activation Energy
Specific- Lock and Key
- 18. Multiple Choice
Most enzymes end in the suffix- Ex: Amylase
-ase
-ise
- 19. Multiple Choice
Enzymes work best at a certain temperature and pH.
True
False
- 20. Multiple Choice
Enzymes are PROTEINS.
True
False
- Answer choicesTagsAnswer choicesTags