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5 Written questions

5 Matching questions

  1. What is the pH scale?
  2. Does form impact function?
  3. What is specific heat?
  4. Organic molecules must always contain what?
  5. What are functional groups? Names?
  1. a pH is the measurement used to quantify the H⁺ ion concentration in an aqueous (water) solution
  2. b YES!
  3. c Small organic molecules with great effects:
    Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl
  4. d Resistance to change in temperature
  5. e Carbon and Hydrogen

5 Multiple choice questions

  1. H⁺ = 10⁻⁷ and OH⁻ = 10⁻⁷ Equation: [H⁺][ OH⁻] = 10⁻¹⁴ (always = to 14)
  2. Organic molecules composed solely of Carbon and Hydrogen; Nonpolar covalent bond so they resist/repel water (ex: fat)
  3. 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. 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. Sulfhydryl (−SH or HS−) (protein cross-linking, stabilizes structure)
    −SH
    Ex: Covalent bonding w/ other sulfhydryls (disulfide bridge)

5 True/False questions

  1. What two properties of water do plants take advantage of, to move water against gravity, explain?Cohesion and Adhesion.
    Cohesion - waters ability to stick to ITSELF (other water molecules)
    Adhesion - waters ability to stick to OTHER THINGS that are POLAR

          

  2. Draw functional group structure and give molecular formula for: Methyl.
    Example?
    Methyl (−CH₃) (sex hormones, DNA methylation (when it gets tagged onto your DNA); C single bonded to 3 H's

    H
    |
    −C − H
    |
    H

    Ex: 5-methyl cytidine

          

  3. Draw functional group structure and give molecular formula for: Amino.
    Example?
    Methyl (−CH₃) (sex hormones, DNA methylation (when it gets tagged onto your DNA); C single bonded to 3 H's

    H
    |
    −C − H
    |
    H

    Ex: 5-methyl cytidine

          

  4. Be able to calculate the molar concentrations of hydrogen and hydroxide ions from a given pH value or vice versa.Ex: pH = 12, What is the molar concentration of H⁺? OH⁻? H⁺ is 1 x 10⁻¹², OH⁻ is 1 x 10⁻².

          

  5. What is the Universal Solvent?WATER!

          

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