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5 Written questions

5 Matching questions

  1. Draw functional group structure and give molecular formula for: Amino.
  2. Does form impact function?
  3. What is a hydrocarbon? Polar or non-polar?
  4. Draw functional group structure and give molecular formula for: Methyl.
  5. How many valence electrons does carbon have? How many single covalent bonds can it form?
  1. a 4 and 4
  2. b Methyl (−CH₃) (sex hormones, DNA methylation (when it gets tagged onto your DNA); C single bonded to 3 H's

    −C − H

    Ex: 5-methyl cytidine
  3. c YES!
  4. d Amino (-NH₂) (acts as a base, amino acids); N single bonded to 2 H's


    Ex: Glycine
  5. e Organic molecules composed solely of Carbon and Hydrogen; Nonpolar covalent bond so they resist/repel water (ex: fat)

5 Multiple choice questions

  1. Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl
  2. pH is the measurement used to quantify the H⁺ ion concentration in an aqueous (water) solution
  3. Waters specific heat is much higher that that of other solvents; this is because of hydrogen bonding; this keeps temperatures of places near/on bodies of water consistent
  4. Sulfhydryl (−SH or HS−) (protein cross-linking, stabilizes structure)
    Ex: Covalent bonding w/ other sulfhydryls (disulfide bridge)
  5. Carbonyl (>CO) (ketones, aldehydes, sugars); C double bonded to O



    Ex: Acetone, the simplest ketone

5 True/False questions

  1. What are the differences between a hydrophilic and hydrophobic substance?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


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


  3. How do acids and bases affect pH?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. What is heat of vaporization? How does it relate to evaporative cooling? What affect does it have on living organisms?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


  5. What are the molar concentrations of hydrogen and hydroxide ions in one liter of pure water?Ex: pH = 12, What is the molar concentration of H⁺? OH⁻? H⁺ is 1 x 10⁻¹², OH⁻ is 1 x 10⁻².