Importance of enzymes
Why are enzymes so important in living cells?
Enzymes are important because they act as biological catalysts.
This means that they bring molecules together in such a way that
they can react. All of the reactions that they catalyze are
chemically possible (at least in theory) even in the absence of
enzymes. However, in the absence of enzymes, these reactions could
not occur fast enough to support life.
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Update: June 2012