GCSE Biology – Enzyme action
Learning Objectives
-I can describe and explain enzyme action
-I can explain enzyme activity in terms of kinetic energy and collisions
-I can explain the effect of pH of enzyme activity in terms of shape and fit
Quiz Summary
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Question 1 of 22
1. Question
Why are enzymes not used up in reactions?
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Question 2 of 22
2. Question
Although enzymes are not used up, what can happen?
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Question 3 of 22
3. Question
What is the name of the model for enzyme action?
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Question 4 of 22
4. Question
Why is the model called lock and key?
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Question 5 of 22
5. Question
What does “enzymes are specific” mean?
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Question 6 of 22
6. Question
Why are enzymes specific?
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Question 7 of 22
7. Question
What part of an enzyme is specific to the substrate (molecule being broken down)?
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Question 8 of 22
8. Question
What happens when an active site is complementary to the substrate?
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Question 9 of 22
9. Question
What happens when an active site is not complementary to the substrate?
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Question 10 of 22
10. Question
What does a changed active site cause?
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Question 11 of 22
11. Question
How is an enzyme denatured?
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Question 12 of 22
12. Question
Once an enzyme is denatured,
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Question 13 of 22
13. Question
What is destroying an enzyme by heating called?
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Question 14 of 22
14. Question
What happens to the kinetic energy of enzymes when they are at lower temperatures?
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Question 15 of 22
15. Question
What happens to the number of successive collisions in the reaction of enzymes when they are at lower temperatures?
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Question 16 of 22
16. Question
Enzymes are
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Question 17 of 22
17. Question
What is the optimum pH for enzymes?
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Question 18 of 22
18. Question
What happens when the pH of an enzyme is too high/low?
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Question 19 of 22
19. Question
What happens to the shape of the active site when the pH of an enzyme is too high/low?
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Question 20 of 22
20. Question
What happens to the substrate when the pH of an enzyme is too high/low?
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Question 21 of 22
21. Question
What happens to an enzyme is the pH is too high?
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Question 22 of 22
22. Question
What happens to an enzyme is the pH is too low?
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