1. Catalysts speed up the rate of the reaction.
lowers the energy input required for a chemical reaction to happen
remains unchanged at the end of the reaction
When you think of a catalyst think of a fire!

2. Enzymes Enzymes are Biological catalysts
Enzymes control chemical reactions that take place in the cytoplasm.
Catalase in an example of an enzyme made by living cells

3. Catalase
The enzyme catalase breaks down the waste substance hydrogen peroxide into water and oxygen.
H2O2
catalase
oxygen +water
(enzyme)
(substrate)
(products)

4. Degradation reactions
animation

5. Synthesis Reaction es
Active site

6. Degradation reactions
Starch
Maltose

7. Enzyme activity
Temperature and pH affect the activity of an enzyme.

8. Optimum Condition
Enzymes function best or are most active in specific conditions known as optimum conditions.

9. Degradation reaction Substrate Enzyme Product Used for:
Hydrogen peroxide
Catalase
Oxygen and water
Waste product
Starch
Amylase
Maltose
Maltase
Glucose
Protein
Pepsin
Peptides
Protease
Amino acids
Fats
Lipase
Fatty Acids and Glycerol

10. Synthesis reaction
Glucose-1-phosphate
Starch

11. Properties of enzymes 1. Speed up reactions. 2. Made of protein.
3. Are specific.
4. Not used up during the reaction.
5. Require optimum conditions at which they work best.
6. At high temperature they become denatured (they break down)

12. Lock and Key