Biology September-29-08

Biology September-29-08 - Biology 29-08 Enzymes(Speed up...

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Biology September-29-08 Enzymes (Speed up reactions 10 12 -10 20 times faster) Energy activation represents a barrier that the reaction must overcome. Propane -thermodynamically unstable but. .. -huge activation energy required to ignite (Enzyme catalyst = Red. .... Normal = Black) -Rate is proportional to the number of activated molecules -Enzymes decrease the needed energy requirement for the activation of a reaction -Enzymes are proteins that help with the tertiary and quaternary structure of genes -Enzymes are extremely precise; they require extremely specific active sites to be activated by the single specific protein -The interaction between action site is not lock and key – it is an induced fit - Enzymes lower the EA through many different ways: - The precise orientation of two substrates
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-The enzyme rearranges the substrate so that the charges favour the reaction - The enzyme strains the substrate forcing it toward a transition state to favour a reaction -Enzymes simply increase the probability of getting a substrate to the desired transition state
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This note was uploaded on 04/04/2009 for the course BIOLOGY 1222 taught by Professor Haffie during the Spring '09 term at UWO.

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Biology September-29-08 - Biology 29-08 Enzymes(Speed up...

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