1. Announcements Turn in Homework –SA 2-3 –Chart of organic compounds

2. Review What is the function of a lipid? T/F Carbon can stably bind with other carbons? What is the monomer of a protein? BONUS –What is dehydration synthesis? What is hydrolysis?

3. Basic Enzyme Information What are enzymes? –Enzymes are proteins. Proteins are made from amino acids. Different combination of amino acids will create different structures of protein. The structure determines function of protein (enzyme) Purpose –Acts as a catalyst for a reaction to take place. It simply lowers the needed energy for a reaction to take place. Enzymes are not used up in during a chemical reaction

4. Paper towel demo What makes up a paper towel? Reaction equation –Cellulose + Oxygen  Carbon Dioxide + Water So let’s try to make the reaction happen

5. Reaction pathway without enzyme Activation energy without enzyme Activation energy with enzyme Reaction pathway with enzyme Reactants Products Section 2-4 Effect of Enzymes Go to Section:

6. Energy-Absorbing Reaction Energy-Releasing Reaction Products Activation energy Activation energy Reactants Section 2-4 Figure 2-19 Chemical Reactions Go to Section:

7. Energy-Absorbing Reaction Energy-Releasing Reaction Products Activation energy Activation energy Reactants Section 2-4 Figure 2-19 Chemical Reactions Go to Section:

8. Enzyme Lab We are going to test the effects of temperature on enzyme activity. Liver contains the enzyme catalase which breaks up H 2 O 2 into H 2 O and O 2 –H 2 O 2  H 2 O and O 2

9. Proper lab write-up Introduction (paraphrase) Hypothesis (which temp is best) Materials (what did you use) Procedure (what did you do) Data and Observations (charts and averages) Questions (3 in the lab) Conclusion (use data to state the best)

10. Lab Write Up Hints Neatness counts –If you can type it, you will receive more points Procedure –Write the procedure as though you will give it to someone who never took biology Graphs/charts –Use graphs (labeled) and data tables

11. Homework SA 2-4 page 53 #1-5 Start looking at the back of the sheet to review for the test next week –Day 2 Have a good day