Curriculum
Course: AQA A Level Biology 7402
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AQA A Level Biology 7402

1. Biological Molecules

0/102

2. Cell Structure

0/95

3. Exchange and Transport

0/98

4. Genetics, Variation and Interdependence

0/94

5. Energy Transfers In and Between Organisms (A Level only)

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6. Organisms Respond to Changes in their Environments (A Level only)

0/93

7. Genetics, Populations, Evolution and Ecosystems (A Level only)

0/55

8. The Control of Gene Expression (A Level only)

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9. Exam Guidance and Skills

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Quiz

1.4.11 Limiting Factors Affecting Enzymes- Inhibitors – Exam questions

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  • Questions count: 5
  • Passing grade: B+
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1.

A competitive inhibitor

binds elsewhere
increases the rate
denatures the enzyme
binds to the active site and competes with the substrate
2.

A noncompetitive inhibitor

binds to the active site
binds to a site other than the active site and changes the enzyme’s shape
is the substrate
has no effect
3.
A non-competitive inhibitor
binds away from the active site and changes its shape
is shaped like the substrate
is overcome by more substrate
binds the substrate
4.
Which statement best describes Competitive inhibitor?
The minimum energy needed for a reaction to start; enzymes lower it.
A permanent change to the tertiary structure and active site of an enzyme, caused by high temperature or extreme pH.
A globular protein that acts as a biological catalyst, speeding up reactions without being used up.
A molecule similar in shape to the substrate that binds the active site and blocks substrate binding.
5.
A noncompetitive inhibitor:
binds the active site
is overcome by excess substrate
increases Vmax
binds an allosteric site and changes enzyme shape
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Part of 1. Biological Molecules — see every lesson and quiz in this unit.
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