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1/24/12

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

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1/24/12

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

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

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

  4. Enzymes

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

  6. Enzymes • Are specific for what they will catalyze • AreReusable • End in –ase -Sucrase -Lactase -Maltase

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

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

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

  10. Active Site Enzyme • The regionof an enzyme molecule in which substrate binds. Active Site Substrate

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

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

  13. What Affects Enzyme Activity? Extreme Temperature are the most dangerous - high tempsmay 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

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

  15. 9/2/11 Do-Now: Complete the Chemistry & Biomolecules Crossword Puzzle. Take out your Chemistry of Life Books.

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