1. Enzymes

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

3. A + B = C + D Chemical Reactions REACTANTS PRODUCTS Enter Left Leave
Right

4. Two Types of Reactions Exothermic Endothermic Absorbs heat
Releases 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 6

7. Enzymes Lower activation energy Ex. Amylase
Breaks down starches into sugars
Video: Cute intro to enzymes and their properties

8. 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

9. Lock & Key

10. 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