ENZYMES ACTIVATION ENERGY & REACTION GRAPHS ADDITIONAL GRAPHS & PRACTICE PROBLEMS.
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Transcript of ENZYMES ACTIVATION ENERGY & REACTION GRAPHS ADDITIONAL GRAPHS & PRACTICE PROBLEMS.
![Page 1: ENZYMES ACTIVATION ENERGY & REACTION GRAPHS ADDITIONAL GRAPHS & PRACTICE PROBLEMS.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d975503460f94a8046c/html5/thumbnails/1.jpg)
ENZYMESACTIVATION ENERGY
&REACTION GRAPHS
ADDITIONAL GRAPHS & PRACTICE PROBLEMS
![Page 2: ENZYMES ACTIVATION ENERGY & REACTION GRAPHS ADDITIONAL GRAPHS & PRACTICE PROBLEMS.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d975503460f94a8046c/html5/thumbnails/2.jpg)
An enzyme:
• is a protein• is a biologic catalyst• is very specific• is not used up in a chemical reaction• has an active site that its substrate
binds to• lowers the activation energy of a
reaction
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Enzymes
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Enzymes
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Types of Chemical Reactions
ENDERGONIC• REACTIONS IN WHICH
THE ENERGY OF THE PRODUCT(S) IS GREATER THAN THE ENERGY OF THE REACTANTS
• THAT IS: ENERGY HAS BEEN ABSORBED IN THE REACTION
EXERGONIC• REACTIONS IN WHICH
THE ENERGY OF THE REACTANTSIS GREATER THAN ENERGY OF THE PRODUCTS
• THAT IS: ENERGY HAS BEEN RELEASED IN THE REACTION
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(don’t worry about ∆G in diagram below)
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Endergonic & Exergonic Energy Graphs
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What is activation energy?
• It is the nrg necessary to get the reaction to go forward (even if it is an exergonic reaction).
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What is activation energy?
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Enzymes Lower the Activation Energy so the Reaction occurs faster & requires less energy
• Red line in graph represents how much energy needed to get from reactants products
• Blue line represents how much energy needed when an enzyme is present
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Enzymes Lower the Activation Energy so the Reaction occurs faster & requires less energy
• The peak of the red line (or blue line) coincides with the point where the bonds in the reactants of the reaction are weakest. It is also called a transition state
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• http://www.youtube.com/watch?v=VbIaK6PLrRM
• http://www.stolaf.edu/people/giannini/flashanimat/enzymes/transition%20state.swf
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• if this extra lesson does not help PLEASE come see Dr. Nugent
• Thank you