1. Enzymes

2. The body is always looking for ways to save energy! This is where enzymes come into play! Help the body do this!

3. Enzymes What are they? What properties do they have? Why do we need them? How do they work?

4. Enzymes – What are they? Proteins that help chemical reactions to occur in living organisms Important Parts of a Chemical Reaction Reactants  Products

5. Enzymes Properties Specific (a different enzyme for each different type of reactions in the body)

6. Enzymes Properties Specific Increase rate of the reaction (help make reaction happen more often or faster)

7. Enzymes Properties Specific Increase rate of the reaction Unchanged at the end of the reaction Reusable

8. Enzymes Properties Specific Increase rate of the reaction Unchanged at the end of the reaction Why do you need them? Reusable

9. Enzymes Need them Reactions naturally occur too slow to maintain life! Can’t increase temperatures in cells (fatal)

10. How do enzymes work?

11. Lock & Key Theory The enzyme needs to bind to the reactants called a substrate at the active site to work. Enzyme Reactant

12. Let’s Do An Example

13. Sucrose + H 2 O Glucose + Fructose

14. Sucrose + H 2 O Glucose + Fructose Reactants Products

15. For a reaction to occur the sucrose & water have to collide with enough energy to break the bond that holds them together to form the new products.

16. For a reaction to occur the sucrose and water would have to collide with enough energy to break bonds and form the new products. This energy is the called activation energy.activation

17. Energy Progress of reaction

18. Energy Progress of reaction Substrates or Reactants

19. Energy Progress of reaction Substrates Products

20. Energy Progress of reaction Substrates Products

21. Energy Progress of reaction Substrates Products Activation energy

22. Energy Progress of reaction Substrates Products Activation energy Enzymes reduce the Height aka reduce the activation energy An Enzyme is like a short cut!

23. What factors can affect the activity of enzymes? Based on these graphs, what conditions are generally the best for enzyme function?