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Enzymes
biological catalysts that speed up the rate of chemical reactions without being altered in the reaction.
Substrate
________ and enzyme molecules have little kinetic energy, hence the frequency of collision is low.
activation energy
To work at their best, enzymes lower this
unchanged
The state of enzymes after they have catalyzed a reaction
lock and key hypotheses
The theory that relates enzyme specificity to the presence of active sites.
denatured
The state of enzymes after being provided with too much heat
inactive
The state of enzymes at lower temperatures
Active site
the region on an enzyme molecule that the substrate binds to.
Optimum pH
The pH at which enzymes work at their best
Note 
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