1. Enzymes
SPI Describe how enzymes control chemical reaction in the body

2. What Are Enzymes? Most enzymes are Proteins.
Act as Catalyst to accelerate a reaction (make it go faster)
Not permanently changed in the process

3. Enzymes They are specific for what they will catalyze or fit
Are Reusable
End in –ase
-Sucrase
-Lactase

4. EXAMPLE: If you put hydrogen peroxide on your skin – no reaction
If you put hydrogen peroxide on blood – bubbles (reaction)

5. What do Enzymes do??
Break down stuff
Make reactions happen
Without them you would die
Integral to digestive system

7. How do enzymes Work?
Enzymes work by lowering activation energy

8. Enzyme attaches to substrate
Reaction begins
Substrate is changes
Reaction stops
Enzyme lets go – floats away
Substrate now becomes the product

9. Enzymes Without Enzyme With Enzyme Free Energy
Progress of the reaction
Reactants
Products
Free energy of activation

10. Enzyme-Substrate Complex
The Active Site location where an enzyme binds to the substrate.
Active Site
Enzyme
Substrate

11. http://highered. mcgraw-hill

12. Factors Affecting Enzyme Activity
Temperature pH
Inhibitors

13. High temperatures are the most dangerous
denature enzymes (change the shape of the substrate)
Most enzymes like near neutral pH (6 to 8)
Inhibitors - slow down enzymes
Ex. Preservatives