Fig. 1: Enzyme-Substrate Reaction
Enzymes are substances present in the cell in small amounts which speed
up or catalyze chemical reactions. Enzymes speed up the rate of chemical reactions
because they lower the energy of activation, the energy that must be supplied
in order for molecules to react with one another. Enzymes lower the energy
of activation by forming an enzyme-substrate complex.
Kaiser's Microbiology Home Page
Gary E. Kaiser
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Updated: Feb. 26, 2002
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