1. Enzymes

2. Chemical Reactions Process that changes one set of chemicals into another set Slow = iron & oxygen = Fast = fireworks RUST

3. Two Parts of Chemical Reactions ReactantsEnterLeftProductsExitRight

4. Two Types of Reactions Exothermic Releases heat Endothermic Absorbs heat

5. Activation Energy Energy needed to start a reaction Difference b/t reactant energy and required energy for reaction to happen Required energy at peak

6. Enzymes Biological catalyst (proteins) Catalyst – substance that speeds up a chemical reaction Why? Rxn is too slow Activation energy is too high

7. Enzymes Lower activation energy Ex. Amylase Amylase Breaks down starches into sugars

8. Enzyme starch

9. Enzyme Sugar

10. Enzymes Enzyme has an active site fits substrate (reactants) Specific action Build up Break down Substrate (Key) + enzyme (Lock) = Enzyme substrate complex Products are released Example

11. Lock & Key

12. Regulation of Enzyme Activity Temperature High temps = fast Low temps = slow pH Enzyme dependent Concentration of substrate Regulated by proteins Produce enzymes at when needed After the first bite of food Break down enzymes when not When all the food is digested

15. How acids effect enzymes Acid (vinegar) amylase Starch-iodine solution Acid (vinegar)

16. Amylase lesson water Starch-iodine solution amylase