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question 64

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Well-designed essay questions require students to


Definitions:

Active Site

A specific region of an enzyme (generally near the surface) that accepts one or more substrates and catalyzes a chemical reaction. Compare with allosteric site.

Enzyme Molecule

A biological catalyst that speeds up the rate of chemical reactions in cells without being consumed in the process.

Substrate

A substance on which an enzyme acts; a reactant in an

Energy of Activation

The minimum amount of energy required to start a chemical reaction, often lowered by the presence of a catalyst.

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