enzymes. what is an enzyme? organic catalyst protein molecule
Post on 19-Jan-2018
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Speed up chemical reactions by lowering the activation energy What is the function of an enzyme?
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Enzymes
What is an enzyme?• Organic catalyst• Protein molecule
Speed up chemical reactions by lowering the activation energy
What is the function of an enzyme?
Activation Energy
• energy required to start all chemical reaction
• How can all reactions require energy, if some are considered exergonic/exothermic?
Induced-Fit Model
Factors that affect enzyme functioning
1. Temperature2. pH 3. Enzyme concentration4. Substrate concentration5. Cofactors/coenzymes6. inhibitors
Cofactors/Coenzymes
Feedback Inhibition
• End product controls action of enzyme• When end product binds to enzyme, there is a
change of shape and enzyme no longer functions
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