The rate of enzyme catalyzed reactions

Last updated: 17/02/2022
AQA A-Level Biology Proteins The rate of enzyme catalyzed reactions
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  1. What happens to the rate of a reaction as enzyme concentration increases?

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  2. What happens to the rate of a reaction as enzyme temperature increases?

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  3. What happens to the rate of a reaction as substrate concentration increases?

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  4. What happens to the rate of a reaction as enzyme pH increases?

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  5. Which of the following is not a limitation of the lock and key model?

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  6. Which factor causes increased kinetic energy?

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  7. The progress of an enzyme-catalysed reaction can be measured by monitoring which of the following?

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  8. The progress of an enzyme-catalysed reaction can be measured by monitoring which of the following?

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  9. As an enzyme-catalyzed reaction proceeds, there is…

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  10. Why does the rate of disappearance of substrate decrease over time in an enzyme-catalyzed reaction?

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  11. Why does the rate of appearance of product decrease over time in an enzyme-catalyzed reaction?

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  12. How can a change in the rate of a reaction be determined from a graph measuring substrate decrease?

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  13. What effect does a rise in temperature have on molecules in a closed system?

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  14. What happens to the rate of an enzyme-catalyzed reaction as the temperature is increased from 0°C to 100°C?

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  15. At temperatures slightly higher than optimum, what happens to an enzymes active site?

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  16. At temperatures above 60°C, what happens to most enzymes?

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  17. What is denaturation of an enzyme?

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  18. What is the appopriate term to describe the effect of high temperature on an enzyme?

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  19. Which of the following can cause denaturation of an enzyme? 1. High temperature 2. Extreme pH 3. High substrate concentration

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  20. Which of the following will not affect the rate of an enzyme-catalysed reaction?

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  21. At pH slightly higher or lower than optimum, what happens to an enzymes active site?

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  22. What is the appopriate term to describe the effect of extreme pH on an enzyme?

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  23. In the presence of excess substrate, which of the following best describes the impact of increasing enzyme concentration on reaction rate?

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  24. In the presence of excess substrate, which of the following best describes the impact of decreasing enzyme concentration on reaction rate?

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  25. In the presence of fixed amounts of enzyme, which of the following best describes the impact of increasing substrate concentration on reaction rate?

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