1. Why do we need enzymes?
It lowers the energy for a chemical reaction to occur! Ex: You only have $380 for a PS4! It cost $400 then you get a coupon so you can buy it sooner!

2. What is an enzyme? Known as a BIOLOGICAL CATALYST
Catalyst is something that speeds up a chemical reaction
Biological catalyst speeds up reactions in living cells

3. Properties of Enzymes They are made of PROTEIN
They are not changed by the reactions they speed up
They are SPECIFIC- means that only one particular enzyme will work with one particular chemical

4. What happens in the stomach?
Pepsin is an enzyme in the stomach
HCL is hydrochloric acid is also in the stomach
Do you think the pepsin alone will digest or break down the food?
Do you think the acid alone will digest or break down the food?
Do you think the pepsin and acid together will digest or break down the food?

5. What does dilute mean?
If I add water to pepsin and acid, what happens?
Will plain water digest or break down food?