Enzymes CH4 competitive inhibitors

competitive inhibition

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  • Created by: tabi a
  • Created on: 20-06-21 16:37
Inhibitor
molecules that prevent enzymes from carrying out their normal function of catalysis
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How does a competitive inhibitor work ?
- molecule that has a similar shape to active site can fit
-blocks substrate, preventing catalysis
- enzyme is inhibited
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What are the effects of a competitive inhibitor ?
substrate and inhibitor molecules compete
less substrates bind to enzyme
rate of reaction slows
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What affects the efficiency a competitive inhibitor ?
relative concentration of :
substrate
inhibitor
enzyme
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Are competitive inhibitors reversible ?
yes , most of the time
there are exceptions e.g aspirin
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Effect of competitive inhibitor on rate of reaction ?
reduces rate for specific concentrations of substrates
does not change Vmax of enzymes
If substrate conc is increased Vmax can be reached
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Give 2 examples of competitive inhibitors
Statins - inhibitors of an enzyme used to synthesise cholesterol - reduce cholesterol

Aspirin - inhibits chemicals e.g thromboxane responsible for producing pain and fever
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Card 2

Front

How does a competitive inhibitor work ?

Back

- molecule that has a similar shape to active site can fit
-blocks substrate, preventing catalysis
- enzyme is inhibited

Card 3

Front

What are the effects of a competitive inhibitor ?

Back

Preview of the front of card 3

Card 4

Front

What affects the efficiency a competitive inhibitor ?

Back

Preview of the front of card 4

Card 5

Front

Are competitive inhibitors reversible ?

Back

Preview of the front of card 5
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