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19. Homework: Lipids

  • Page ID
    31934
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    The following problems are meant to provide an idea of the types of questions that could be asked on exams/quizzes.

    1. What characteristic defines all lipids?
    2. Are fatty acid chains found in all lipids?
    3. Draw the structure of an example of each of the following types of lipids. In each drawing, circle the polar portion in each molecule.
      • fatty acid
      • wax ester
      • triacylglycerol
      • phospholipid
      • steroid
    4. What does "unsaturated" mean?
    5. What is the most common type of geometry about C=C in naturally-occuring fatty acids?
    6. Which is the most energetically stable geometry about C=C in hydrocarbon chains?
    7. Which has a higher melting point, saturated or unsaturated fatty acids?
    8. Vegetable oil is a common lipid and is liquid at room temperature. Is this oil mostly saturated or unsaturated?
    9. Which is more common, fatty acids with an even or odd number of carbon atoms?
    10. What structural feature does an "omega-3" fatty acid have?
    11. Draw the product(s) of the reaction
      CH3(CH2)17-O-C(=O)-(CH2)19CH3 + H2O
    12. Draw the product(s) of the reaction
      3 fatty acids + glycerol --> ???
    13. Draw the product(s) of the reaction
      triacylglycerol + 3 OH- --> ???
      What type of reaction is this?
    14. List several benefits and a potential hazard of partial hydrogenation.
    15. Which is more polar, TAG or a phospholipid ?
    16. Which is more polar, a steroid or a phospholipid ?
    17. What is the primary component of cell membranes?
    18. Draw a "cartoon" of a micelle. Label the polar and non-polar portions.
    19. Draw a "cartoon" of a cell membrane. Label the polar and non-polar portions.

    19. Homework: Lipids is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by LibreTexts.

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