what are enzymes? proteins, with complex 3-d shapes have an active site which can bind a substrate...
Post on 06-Jan-2018
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What Are Enzymes?Proteins, with complex 3-d shapes
Have an active site which can bind a substrate (reactants)
Help Chemical Reactions Occur
Notice the enzyme is not used up in the reaction!
Only a certain substrate will fit in the active site
How?Allows bonds in substrate to be
broken more easily, with less input of energy
Another Example
Reaction Energy Diagrams
Activation Energy
Activation EnergyInput of energy required to break
initial bonds and begin the reactionEven if reaction will release energy
Enzymes Lower EaMake the transition state easier to
reach
Endergonic vs. Exergonic
Specificity of Active Sites
Enzymes only catalyze substrates with a complementary shape
Any changes to the shape of the enzyme will disable the activity of the active site
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