Enzymes CH4 competitive inhibitors competitive inhibition 0.0 / 5 ? BiologyEnzymes CH4 OCRAA2/A-levelOCR Created by: tabi aCreated on: 20-06-21 16:37 Inhibitor molecules that prevent enzymes from carrying out their normal function of catalysis 1 of 7 How does a competitive inhibitor work ? - molecule that has a similar shape to active site can fit -blocks substrate, preventing catalysis - enzyme is inhibited 2 of 7 What are the effects of a competitive inhibitor ? substrate and inhibitor molecules compete less substrates bind to enzyme rate of reaction slows 3 of 7 What affects the efficiency a competitive inhibitor ? relative concentration of : substrate inhibitor enzyme 4 of 7 Are competitive inhibitors reversible ? yes , most of the time there are exceptions e.g aspirin 5 of 7 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 6 of 7 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 7 of 7
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