1. ENZYMES are proteins that catalyze [start/speed up] chemical reactions
Building Reactions
Breaking Reactions

2. Enzymes speed up chemical reactions by lowering activation energy needed to start the reaction

3. enzymes only speed up one specific reaction

4. How Enzymes Work enzyme comes close to substrate [starting chemicals]
Enzyme + substrate attach at active site so catalysis happens  substrate is changed
enzyme releases product and goes back to work again

5. Factors that Affect Enzymes:
Temp (human enzymes work best at 37⁰ C)
pH (stomach enzymes work best in acid)
Ionic conditions (salt concentration)

6. the wrong conditions DENATURE enzymes 3D shape destroyed = enzyme doesn’t work