Essential to Life ENZYMES.

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Presentation transcript:

Essential to Life ENZYMES

CharactericASE of Enzymes “Traffic Cops” that keep everything regulated (homeostasis) Chemically specific CATALYST : the rate of reactions by a million

How do enzymes work? Enzymes lower the amount of energy needed to reach the Activation Energy (Ea) Ea must be reached for any chemical reaction to occur Usually by kinetic energy Ea= faster reaction

Mechanism of Enzyme Action

Animation

Enzyme Action Mechanism Let’s review: -Substrate? -Active Site? -Induced-fit Model=Dan Koshland Substrate binding causes structural change yielding a perfect fit. - E + S E-S P + E

Enzyme on the Job Hexokinase and Glucose

CharactericASE of Enzymes Some enzymes are inactive until needed (digestive enzymes) Others are deactivated immediately after use (blood clotting) Reused Examples

Ground Rules for Success! Enzymes require stable pH to perform +/- 7 (pepsin is an exception) Maintained body temperature or else…….

Denatured!!

1. Animation on ENZYMES 2. Enzymes 3.Smartboard Presentation