Enzymes are proteins that function as biological catalysts: Catalysts
are substances that speed up
reactions without being used up in the process. Enzymes speed up the
chemical reactions needed
to maintain life (metabolic reactions).
to maintain life (metabolic reactions).
The sum of all chemical reactions going on within a living organism is
known as metabolism
Molecules that react with enzymes are called substrates: molecules
produces are called products.
Enzymes are specific; they only work on one kind of substrate
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