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- 1. Multiple ChoiceEnzymes are considered to beLipidsCarbohydrateProteinNucleic Acid
- 2. Multiple ChoiceWhat is the purpose of an enzyme?give permission for the reactionraise activation energyspeed up reactionscontrol how many reactions occur
- 3. Multiple ChoiceWhere do substrates bind on an enzyme?voltage-gated channelssurface receptorcalcium channelsactive site
- 4. Multiple ChoiceWhat happens when enzymes are heated to a high temperature?The enzymes die.The shapes of the enzyme are altered or denaturedThe enzymes' amino acid sequence changes.The enzymes remain the same
- 5. Multiple ChoiceWhat are the enzymes called when they are at low temperature?denaturedKilledinactivenormal
- 6. Multiple Choice
What are the enzymes called when they are at high temperature or extreme pH?
denatured
Killed
inactive
normal
- 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 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
- 9. Multiple ChoiceEvery enzyme has a optimal temperature and pH. True or False?TrueFalse
- 10. Multiple Choice
Based on the graph, what temperature does this enzyme work best?15 C40 C30 C47 C - 11. Multiple ChoiceWhich of the following conclusions can be drawn from this graph?The optimum pH of the enzyme is 6.6.The optimum pH of the enzyme is 5.8The enzyme’s activity increases as pH increases 5.0 to 9.0The enzyme’s activity is greater around pH of 8.0 .
- 12. Multiple Choice
Cells can only work if their enzymes are functioning. What can you infer from the graph?
Cells function best at low pH values
Cells function fine at all pH values
Cells function best at high pH values
Cells do not function well if the pH is too high or too low
- 13. Multiple Choice
What is the optimal pH of enzyme A?
8
2
5.7-10
10
- 14. Multiple Choice
What is the optimal pH of enzyme B?
8
2
5.7-10
10
- 15. Multiple ChoiceThe graph shows the relative rates of action of four enzymes, A, B, C, and D. Which enzyme shows the greatest change in its rate of action with the least change in pH?enzyme Aenzyme Benzyme Cenzyme D
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