Biology 2.8 Enzyme Inhibition

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Enzyme inhibitor = substance that directly or indirectly interferes with functioning of active site of enzyme - reducing activity.

Two types:

  • Competitive inhibitor - binds to active site of enzyme.
  • Non-competitive inhibitor - binds to enzyme at position other than active site.

Competitive inhibitors

Have molecular shape similar to substrate.

Can occupy active site of enzyme and compete with substrate.

Difference between concentration of inhibitor and concentration of the substrate = affect inhibitor has on enzyme activity.

Competitive slows action because eventually all substrate will occupy an active site.

Effect is decreased by increasing substrate concentration.

Non-Competitive inhibitors

Attach themselves to enzyme at a site other than active…


Bethany Cunningham


Great but there is a spelling mistake 'iner membrane'.

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