1. Very important proteins
Enzymes
VIP’s!
Very important proteins

2. Proteins that start up or speed up chemical reactions.
Enzymes
Proteins that
start up or speed up
chemical reactions.

3. 5.5A Activation E is the E needed to start a chemical reaction Catalysts lower that amount of E needed
So, catalysts speed up chemical reactions
Enzymes are catalysts fir chemical reactions in living things

4. A B
Substrate molecules
Active Site
of the
Enzyme molecule

5. High School | Science - Mr. Wanamaker

6. How enzymes work:

7. A B
Active
Site
Enzyme molecule

8. B A
Active
Site
Enzyme molecule

9. Enzyme molecule lowering the …???
Substrates that are brought together REACT (change!) A B
active site
Enzyme molecule lowering the …???

10. Product molecule Is different! Enzyme molecule is… active site
Unchanged so can be
reused

11. Enzyme Substrate Active Site- the important part of an enzyme
Fits the active site
Active Site- the
important part of
an enzyme

13. Enzyme + Substrate

14. The reaction begins

15. Product
Enzyme +Substrates
Enzyme

16. The substrate is broken
Hydrolysis Reaction
What kind of reaction is this?
The substrate is broken
into small molecules.

17. Small substrate molecules
Synthesis Reaction
What kind of reaction is this?
Small substrate molecules
build a large product.

18. Name all of the parts of this reaction.
Enzyme + Substrate
Name all of the parts
of this reaction.
Enzyme
Enzyme
Substrate
Product

19. An enzyme. What kind of organic molecules are they made of?

20. Active Site Enzyme – Substrate Complex
- place where the substrate fits

22. The Lock and Key Hypothesis
Enzymes are specific:
They only work on specific substrates
The Lock and Key Hypothesis

23. Naming Enzymes
Take the name of the substrate, add “ase”, and you have named the enzyme that affects it!

24. Examples Maltase Lipase Protease Enzymes are specific
What enzyme breaks down lactose?

25. Factors that affect the rate of enzyme action
The concentration of the enzyme

26. Factors that affect the rate of enzyme action
The concentration of the substrate (s)

27. Enzyme reactions are affected by:pH
All reactions have a pH in which they work best. They are different for different enzymes

28. Temperature Enzyme reactions are affected by:
All reactions have a pH in which they work best

29. Denaturation
Changing the shape of the protein (like an enzyme), and it no longer works