Essential Idea: Enzymes control the metabolism of the cell. |
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Q1-3: This image is of the enzyme catalase which breaks down hydrogen peroxide in living tissues releasing oxygen and water. |
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1. Which type of biological molecule is catalase?
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2. State the name of the substrate that fits into the active site.
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3. When catalase is heated to over 60oC for several minutes, what happens to the reaction when the catalase is added to hydrogen peroxide?
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Q4-6: The graph below shows how temperature affects the rate of reaction caused by an enzyme such as catalase: |
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4. At X the rate of reaction increases due to ...
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5. What is happening to the active site of the enzyme in Z?
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6. Which of the following may denature an enzyme?
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Q7-9: A student carried out an experiment to investigate the effect of changing the substrate concentration on the activity of an enzyme. Their data is shown in the graph below:
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7. At which concentration are approximately half of the active sites of the enzyme filled at a given time?
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8. Why does the graph begin to flatten off at M?
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9. Which of the following must be kept constant throughout the experiment?
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10. Which of the following will not be affected by immobilizing an enzyme?
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