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Chapter 2 The Chemistry of Life

Chapter 2 The Chemistry of Life. 2-2 Properties of water. The Water Molecule. How is water neutral? KeyC#1: Why are water molecules polar? Uneven distribution of electrons between the hydrogen and oxygen atoms. Oxygen (-) Hydrogen (+) Let’s draw!.

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Chapter 2 The Chemistry of Life

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  1. Chapter 2 The Chemistry of Life 2-2 Properties of water

  2. The Water Molecule • How is water neutral? • KeyC#1: Why are water molecules polar? • Uneven distribution of electrons between the hydrogen and oxygen atoms. • Oxygen (-) • Hydrogen (+) • Let’s draw! • Why are polar molecules attracted to each other? • What is the difference between COHESION and ADHESION? • What are some examples of each? • http://ed.ted.com/lessons/how-polarity-makes-water-behave-strangely-christina-kleinberg#watch

  3. Solutions and Suspensions • What is a mixture? Give me some examples of mixtures. • What is a solution? • Solute is diLUTEd • Solvent is the disSOLVEr • Suspensions: materials that do not dissolve but are suspended (i.e. blood)

  4. Acids, Bases, and pH • What is the range of the pH scale? • What is an acid? • What is a base? • What is a buffer? • What is the pH of pure water? Explain.

  5. Chapter 2The Chemistry of Life 2-3 Carbon Compounds

  6. The Chemistry of Carbon • Why is carbon important?

  7. Macromolecules • What is a macromolecule? • How are they formed? • KeyC#1: What are the functions of each group of organic compounds? • Carbohydrates • Lipids • Nucleic Acids • Proteins

  8. Carbohydrates • Composition: 1:2:1 ratio of carbon, hydrogen and oxygen atoms. • Function: used for energy and structure • Simple sugars are called… • Complex sugars are called…

  9. Lipids • Composition: mostly carbon and hydrogen atoms (glycerol molecule + fatty acid, fig. 2-14) • Function: energy storage; waterproof membranes • Ex. Cell Membrane • What does it mean when a lipid is saturated or unsaturated?

  10. Nucleic Acids • Composition: H, O, N, C, and P; polymers of nucleotides • What is a nucleotide? • Function: store and transmit genetic information • What are the two kinds of nucleic acids?

  11. Proteins • Composition: N, C, H and O; polymers of amino acids. • Function: reaction rates, cell processes, form muscles and bones, transportation, fight disease…… • What makes amino acids different from one another? • How are proteins organized?

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