1. ENZYMES ARE PROTEINS THAT SPEED UP SPECIFIC REACTIONS IN CELLS
CHAPTER 5.5
ENZYMES ARE PROTEINS THAT SPEED UP SPECIFIC REACTIONS IN CELLS
Do Now: Cracker Activity
Predict what cracker will taste like at the beginning and end of the minute. Chew for 1 minute without swallowing
Cracker should taste sweet at end of 1 minute because amylase enzyme breaks down starch into maltose

2. ENZYMES AND ACTIVATION ENERGY
Activation Energy- the energy needed to start a reaction
EXAMPLE: Candle Burning
If you heat something to lower the activation energy structures in the cell can become destroyed
Therefore, we need enzymes!

3. ENZYMES AND ACTIVATION ENERGY
Catalysts- substances that speed up chemical reactions
Enzyme- the main catalyst of chemical reactions

4. Enzymes Foods have Enzymes! Speed up reactions!
Example: Fruits and Vegetables, Nuts, Seeds
ENZYMES ARE PROTEINS_
Help Digestion and Fighting Bacteria

5. What are enzymes? Your body has lots of reactions!
Enzymes: Special Proteins that speed up specific reactions
End in ASE
Ex. Lactase digest lactose
HOW?
Some people are lacking this enzyme, take the lactase enzyme as a pill

6. Enzymes Lower Activation Energy
The energy needed to get a reaction started

7. Lower the Activation Energy
Activation energy is the “start up” energy of a reaction
Enzymes speed up reactions by lowering the activation energy
They do not raise the temp!

8. Enzymes Without Enzyme With Enzyme Free Energy
Progress of the reaction
Reactants
Products
Free energy of activation

9. Elephant Toothpaste

10. HOW ENZYMES WORKEnzymes are Specific
The shape of an enzyme fits only particular molecules
Substrate- a specific reactant to an enzyme
Active Site- the area the substrate fits in

11. enzyme= sucrase
Substrate= sucrose

12. Reaction for enzyme -Put together substrates
Contact lens cleaner, laundry detergent, drain cleaner research enzyme and substrate for each product and product

13. Find the Enzyme, Substrate, and Product For Each Substance

14. Online Activity 5.5
Worksheet

15. Enzymes

16. Effects on Enzymes
Temperature pH

17. Temperature
Enzymes are PROTEIN
Heat too high they can denature

18. pH
Enzymes work best at an ‘optimal’ pH
Trypsin

19. Enzymes are Reusable Enzymes will speed the reaction for a substrate
It will release the product and will work on another substrate

20. Examples Lipase Protease Lactase Sucrase Amylase
Life is not possible without enzymes! !!!!!!!
-catalase found in contact lens cleaner, breaks down hydrogen peroxide, but how did h202 get there?
When you get a cut and add catalase, it bubbles, why?
Biproduct of all cells, but poisonous!!! So we need to break it down and get rid of it
Catylase breaks it down into water and oxygen

21.
Liver lab demo