A Level biology – Enzyme inhibition

Last updated: 12/11/2019

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Question 1 of 20
1. Question
Where do competitive inhibitors bind?
- The active site
- The activation site
- Region away from the active site
- Region away from the activation site
Correct
Incorrect
Question 2 of 20
2. Question
Where do non-competitive inhibitors bind?
- Region away from the active site
- The active site
- The activation site
- Region away from the activation site
Correct
Incorrect
Question 3 of 20
3. Question
Which of the following describes competitive inhibitors?
- They have a similar shape to that of the substrate molecules
- They bind to the enzyme away from the active site
- They cause the active site to change shape
- Increasing the concentration of substrate does not affect the rate of reaction
Correct
Incorrect
Question 4 of 20
4. Question
Which of the following describes competitive inhibitors?
- They block the active site
- They are a different shape to the substrate
- Increasing the concentration of substrate does not affect the rate of reaction
- They cause the active site to change shape
Correct
Incorrect
Question 5 of 20
5. Question
Which of the following describes non-competitive inhibitors?
- They cause the active site to change shape
- They have a similar shape to that of the substrate molecules
- Increasing concentration of a substrate will increase the rate of reaction
- They block the active site
Correct
Incorrect
Question 6 of 20
6. Question
The effect that a competitive inhibitor has on enzyme activity depends on…
- The difference between the concentration of inhibitor and the concentration of substrate
- The concentration of the substrate
- The concentration of the inhibitor
- The difference between the concentration of inhibitor and the concentration of products
Correct
Incorrect
Question 7 of 20
7. Question
Which of the following best describes competitive inhibitors
- The bind temporarily to the active site
- They bind permanently to the active site
- They bind permanently to the substrate
- They bind temporarily to the substrate
Correct
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Question 8 of 20
8. Question
In the presence of a fixed concentration of competitive inhibitor, increasing the substrate concentration will…
- Increase the reaction rate
- Decrease the reaction rate
- Have no affect on the reaction rate
- Decrease the concentration of product
Correct
Incorrect
Question 9 of 20
9. Question
In the presence of a fixed concentration of substrate, increasing the concentration of competitive inhibitor will…
- Decrease the reaction rate
- Increase the reaction rate
- Have no affect on the reaction rate
- Increase the concentration of product
Correct
Incorrect
Question 10 of 20
10. Question
Which of the following is a competitive inhibitor of the enzyme succinate dehydrogenase?
- Malonate
- Succinate
- Maltose
- Sucrose
Correct
Incorrect
Question 11 of 20
11. Question
How do non-competitive inhibitors affect an enzyme’s active site?
- They attach at a binding site that is not the active site but alter the shape of the active site
- They attach at the active site and alter its shape
- They attach at a binding site that is not the active site and have no effect on the active site
- They binding to substrates and prevent them from binding to the active site
Correct
Incorrect
Question 12 of 20
12. Question
In the presence of a fixed concentration of non-competitive inhibitor, increasing the substrate concentration will…
- Have no affect on the reaction rate
- Decrease the reaction rate
- Increase the reaction rate
- Decrease the concentration of product
Correct
Incorrect
Question 13 of 20
13. Question
In the presence of a fixed concentration of non-competitive inhibitor, increasing the enzyme concentration will…
- Increase the reaction rate
- Decrease the reaction rate
- Have no affect on the reaction rate
- Decrease the concentration of product
Correct
Incorrect
Question 14 of 20
14. Question
Increasing substrate concentration will decrease the effectiveness of which type of inhibitor?
- Competitive inhibitor
- Non-competitive inhibitor
- Both competitive and non-competitive inhibitors
- Neither competitive or non-competitive inhibitors
Correct
Incorrect
Question 15 of 20
15. Question
Increasing enzyme concentration will decrease the effectiveness of which type of inhibitor?
- Non-competitive inhibitor
- Competitive inhibitor
- Both competitive and non-competitive inhibitors
- Neither competitive or non-competitive inhibitors
Correct
Incorrect
Question 16 of 20
16. Question
Which type of inhibitor alters the shape of an enzyme’s active site?
- Non-competitive inhibitor
- Competitive inhibitor
- Both competitive and non-competitive inhibitors
- Neither competitive or non-competitive inhibitors
Correct
Incorrect
Question 17 of 20
17. Question
Which type of inhibitor permanently alters the shape of an enzyme’s active site?
- Neither competitive or non-competitive inhibitors
- Competitive inhibitor
- Both competitive and non-competitive inhibitors
- Non-competitive inhibitor
Correct
Incorrect
Question 18 of 20
18. Question
Which type of inhibitor decreases the concentration of product?
- Both competitive and non-competitive inhibitors
- Competitive inhibitor
- Neither competitive or non-competitive inhibitors
- Non-competitive inhibitor
Correct
Incorrect
Question 19 of 20
19. Question
How could you test whether an unknown inhibitor is competitive or non-competitive?
- Increase the substrate concentration and see if it increases the reaction rate
- Measure the rate of substrate use
- Measure the rate of product formation
- Measure the enzyme concentration
Correct
Incorrect
Question 20 of 20
20. Question
In the presence of unknown inhibtor, if the reaction rate increases when substrate concentration is increased, what type of inhibitor is it?
- Competitive inhibitor
- Non-competitive inhibitor
- Cannot tell from this test
- None of the above
Correct
Incorrect