GCSE Biology – Enzymes
Learning Objectives
-I can describe how can enzyme works
-I can explain how an enzyme is affected at different temperatures and pH
-I can describe the ‘lock and key’ mechanism
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Question 1 of 25
1. Question
What is the definition of an enzyme?
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Question 2 of 25
2. Question
What are enzymes?
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Question 3 of 25
3. Question
What type of molecules are enzymes?
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Question 4 of 25
4. Question
What type of catalysts are enzymes?
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Question 5 of 25
5. Question
What is the name of the model for enzyme action?
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Question 6 of 25
6. Question
Why is the model called “lock and key”?
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Question 7 of 25
7. Question
What do enzymes do?
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Question 8 of 25
8. Question
Why are enzymes not used up in reactions?
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Question 9 of 25
9. Question
Although enzymes are not used up, what can happen?
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Question 10 of 25
10. Question
What does “enzymes are specific” mean?
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Question 11 of 25
11. Question
Why are enzymes specific?
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Question 12 of 25
12. Question
What part of an enzyme is specific to the substrate (molecule being broken down)?
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Question 13 of 25
13. Question
What happens when an active site is complementary to the substrate?
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Question 14 of 25
14. Question
What happens when an active site is not complementary to the substrate?
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Question 15 of 25
15. Question
What does a changed active site cause?
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Question 16 of 25
16. Question
How is an enzyme denatured?
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Question 17 of 25
17. Question
Once an enzyme is denatured,
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Question 18 of 25
18. Question
Enzymes are
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Question 19 of 25
19. Question
What happens when an enzyme is heated?
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Question 20 of 25
20. Question
What is destroying an enzyme by heating called?
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Question 21 of 25
21. Question
What is the optimum temperature for body enzymes?
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Question 22 of 25
22. Question
What happens to rate of reaction of body enzymes when heated to 40 °C?
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Question 23 of 25
23. Question
What happens when body enzymes are heated past 40 °C?
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Question 24 of 25
24. Question
Why do body enzymes stop working over 40 °C?
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Question 25 of 25
25. Question
What are the products of digestion nused for?
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