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Factors Affecting Rates of Reaction of
Enzyme Catalysed Reactions


pH level

Enzyme Concentration

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Page 2

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Substrate Concentration

Competitive Inhibition

A molecule similar to substrate in shape fits in active site
It fits in shape of enzyme
Bu different enough so enzyme doesn't function
So active site is blocked
this is a reversible reaction

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Page 3

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Non - Competitive Inhibition
e.g. Heavy metal ions ­ Hg2+ or Pb2+

Binds at someplace other than the active site
causes change in 3D structure
Disrupts the active site

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