1. 1/24/12 Do-Now: Take out yesterdays Chemistry Review Notes 1.What is an atom? 2.What are the three subatomic particles of the atom and their charges? 3.List three phases of matter. Which has the most energy of the three phases? Explain. 4.What are buffers & what do they help the body to maintain? 1

2. 1/25/12 Do-Now: Turn to pp44 1.What is organic chemistry the study of? 2.Read “The Chemistry of Carbon,” write a 3 sentence summary over what you read. 3.What is a monomer? A polymer? 2

3. 1/26/12 Do-Now: Take out your Macromolecules Magic Squares HW & “Chemistry of Life Book 1.List the 4 polymers found in living things. 2.What are the monomers for each of the polymers listed in #1? 3.The amount of energy needed to start a reaction is ___. 4.Explain the difference between an ionic and a covalent bond. 3

4. 4 Enzymes

5. 5 What Are Enzymes? Proteins (Most enzymes are Proteins (tertiary and quaternary structures) CatalystAct as Catalyst to accelerates a reaction Not permanentlyNot permanently changed in the process

6. 6Enzymes catalyzeAre specific for what they will catalyze ReusableAre Reusable aseEnd in –ase-Sucrase-Lactase-Maltase

7. 7 How do enzymes Work? weakening bonds which lowers activation energy Enzymes work by weakening bonds which lowers activation energy

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

9. 9

10. 10 Enzyme-Substrate Complex substance enzyme substrate The substance (reactant) an enzyme acts on is the substrate Enzyme Substrate Joins

11. 11 Active Site region enzyme substrate bindsThe region of an enzyme molecule in which substrate binds. Enzyme Substrate Active Site

12. 12 Lock and Key Mechanism A theory that describes how only the correctly shaped substrate fits into a particular enzyme.

13. 13 Lock and Key Mechanism The enzyme is the lock. The substrate is the key.The substrate is the key. Enzyme Active Site substrate

14. 14 What Affects Enzyme Activity? Extreme Temperature are the most dangerous Extreme Temperature are the most dangerous - high temps denature (unfold) enzyme. - high temps may denature (unfold) the enzyme. Changes in pH (most like 6 - 8 pH near neutral) - Any variation from neutral may also denature the enzymes as well

15. Ticket Out The Door Provide the meaning of the following: 1.Equi-8. Trans- 2.Exo-9. -ase 3.Hyper-10. Iso- 4.Hypo-11. Macro- 5.Phago-12. Poly- 6.Pino-13. Mono- 7.-osis 14. How are atoms & elements different? 15

16. 9/2/11 Do-Now: Complete the Chemistry & Biomolecules Crossword Puzzle. Take out your Chemistry of Life Books. 16