1. Enzymes
Learning Goal 5

2. Category Enzymes are Proteins Proteins = tools 1 tool for every job
1 protein for every job

3. Chemical Reaction Atoms are rearranged Reactants  Products
H + O  H2O
Reactants  Products
(Substrate)

4. Enzyme Function Enzymes control chemical reactions in your body
Normal chemical reactions are slow
Enzymes catalyze (speed up) the reactions
Example: enzymes speed up digestion so it takes 2 days instead of 200 days

5. Practice
What does catalyze mean?

6. Function The difference between enzymes is their shape
Lock and Key Model
Lock = enzyme
Key = substrate
Substrates are always the reactants

7. Practice
What is the difference between enzymes?
What is a substrate?

8. Activation Energy All chemical reactions need energy to start them
The energy to start a chemical reaction is called Activation Energy

9. Activation Energy & Enzymes
Enzymes catalyze chemical reactions by lowering the activation energy needed

10. Practice What is activation energy?
How do enzymes speed up chemical reactions?

11. Denaturing Enzymes
Homeostasis = maintaining a stable internal environment
98.6 degrees F
7.4 pH
Change either of these and enzymes will denature (slow down, and stop = you die)

12. Practice
What does denature mean?
Why is it bad to denature enzymes?

13. Quick Write What is/are the monomer(s) for lipids?
What are the monomer and polymer for proteins?
What are some functions of proteins?

14. Closure Quiz
What is a substrate?
What do enzymes do?