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