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5 Written questions

5 Matching questions

  1. Do the functional groups have an impact on life? Give an example.
  2. How do acids and bases affect pH?
  3. What are the differences between a hydrophilic and hydrophobic substance?
  4. What is heat of vaporization? How does it relate to evaporative cooling? What affect does it have on living organisms?
  5. Organic molecules must always contain what?
  1. a Heat required to convert 1g of liquid into a gaseous state (high); Evaporative cooling is the warmest molecules of a liquid leave as a gas; allows us to sweat, or release heat so we don't die
  2. b Hydrophilic - attracted to water; polar or ionic; has charge
    Hydrophobic - repels water; nonpolar; no charge
  3. c Yes. Ex: tiny tag from a functional group determines whether we are males or females
  4. d Carbon and Hydrogen
  5. e Acids raise the concentration of H⁺ ions in an aqueous solution (decreases the pH number)
    Bases lower the concentration of H⁺ ions (increases the pH number)

5 Multiple choice questions

  1. Phosphate (−OPO₃²⁻) (acid: DNA, cell membrane, ATP); P double to O, single to O, 2 O⁻

    O

    −O−P−O⁻
    |
    O⁻

    Ex: glycerol phosphate
  2. WATER!
  3. Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl
  4. Hydrogen bonds are the bonds between two polar molecules - one with a partial positive charge and one with a partial negative charge; water is perfect for this because it has the partial negative of Oxygen and the partial positive of Hydrogen.
  5. Resistance to change in temperature

5 True/False questions

  1. Draw functional group structure and give molecular formula for: Carboxyl.
    Example?
    Carbonyl (>CO) (ketones, aldehydes, sugars); C double bonded to O

    O

    −C
    |

    Ex: Acetone, the simplest ketone

          

  2. What are the different types of isomers (changes) and how are they different?1.) Structural - changes structural form; same formula, different structure
    2.) Geometric - differ in spatial arrangement due to inflexibility of double bond (two types: cis and trans) 3.) Enantiomers - mirror images of each other

          

  3. Does form impact function?Buffers are molecules that resist change in pH; they either release H⁺ to lower the pH or take up H⁺ to raise the pH

          

  4. Draw functional group structure and give molecular formula for: Sulfhydryl.
    Example?
    Hydroxyl (polar, form hydrogen bonds, polar solvents)
    −OH (may be written HO-)
    Ex: Alcohols, such as Ethanol

          

  5. What is the pH scale?Buffers are molecules that resist change in pH; they either release H⁺ to lower the pH or take up H⁺ to raise the pH

          

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