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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 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?


1 25 12

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?


1 26 12

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.


Enzymes

Enzymes


What are enzymes

What Are Enzymes?

  • Most enzymes are Proteins (tertiary and quaternary structures)

  • Act as Catalyst to accelerates a reaction

  • Not permanently changed in the process


Enzymes1

Enzymes

  • Are specific for what they will catalyze

  • AreReusable

  • End in –ase

    -Sucrase

    -Lactase

    -Maltase


How do enzymes work

How do enzymes Work?

Enzymes work by weakening bonds which lowers activation energy


Enzymes2

Enzymes

Without Enzyme

With Enzyme

Free

Energy

Free energy of activation

Reactants

Products

Progress of the reaction


Enzyme substrate complex

Enzyme-Substrate Complex

Enzyme

The substance (reactant) an enzyme acts on is the substrate

Joins

Substrate


Active site

Active Site

Enzyme

  • The regionof an enzyme molecule in which substrate binds.

Active Site

Substrate


Lock and key mechanism

Lock and Key Mechanism

  • A theory that describes how only the correctly shaped substrate fits into a particular enzyme.


Lock and key mechanism1

Lock and Key Mechanism

Active Site

substrate

Enzyme

  • The enzyme is the lock.

  • The substrate is the key.


What affects enzyme activity

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


Ticket out the door

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?


9 2 11

9/2/11

Do-Now:

Complete the Chemistry & Biomolecules Crossword Puzzle.

Take out your Chemistry of Life Books.


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