Lesson Flashcards: Enzymes

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Definition

Proenzymes (zymogens)

Inactive forms of enzymes that need certain substances or conditions available to activate them

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Definition

Kinetic energy

Energy that is associated with movement

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Definition

Enzyme

A biological catalyst that speeds up the rate of reactions without being used up

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Definition

Catalyst

A substance that lowers the activation energy required for a chemical reaction to occur without being used up itself so that the overall reaction occurs at a faster rate

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Definition

Substrate

The substance complementary in shape to an enzyme’s active site upon which an enzyme acts

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Definition

Complementary shape/fit

A term describing that only substrates of a specific shape will fit in an enzyme’s active site and undergo a chemical reaction

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Definition

Enzyme denaturation

The process that occurs when an enzyme’s active site changes shape so that it no longer has a complementary shape to its specific substrate molecule

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Definition

Active site

The region of an enzyme molecule to which a specific substrate will bind and undergo a chemical reaction

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