1. What Happens to the Food You Eat?
Biology

2. Enzymes Complex molecules, proteins Function:
Speed up chemical reactions that otherwise would take place slowly
Catalyst
Required in small amounts
Not used up:Reusable
Have a narrow range of temperature and PH
Have specific active site (lock and key)

3. Enzymes Naming enzymes Examples Usually end in -ase
Combine the name of substrate with -ase
Examples
Substrate Sucrose , enzyme sucrase
Substrate Lactose, enzyme lactase
Exception: Substrate hydrogen peroxide, enzyme catalase

4. Lock and Key Hydrogen Peroxide H2O2 Catalase
Hydrogen Peroxide --> Water and Oxygen +
H2O O2

5. Enzyme Function
Substrate
Enzyme

6. Carbohydrates A. Amylase A. Mouth Q. Where are carbohydrates digested?
Q. What is the enzyme that
breaks carbohydrates
down?
A. Amylase

7. Proteins A. Pepsin A. Stomach Q. Where are proteins digested?
Q. What is the enzyme that
breaks proteins down?
A. Stomach
A. Pepsin

8. Lipids A. Small Intestine Q. Where are lipids digested?
Q. What is the enzyme that
breaks lipids
down? A.
Pancreatic lipases