Biochemistry 2 - Lipids

20 Questions

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Biochemistry 2 - Lipids

A quiz for the SBI4U Biochemistry Unit.


Questions and Answers
  • 1. 
    The basic backbone of most fat or oil molecules is an alcohol called....
    • A. 

      Glycerol

    • B. 

      Glycerin

    • C. 

      Glyceric acid

    • D. 

      Glycogen

  • 2. 
    Which of these statements best describes the composition of Lipids?
    • A. 

      C, H, O in a 1:2:1 Ratio

    • B. 

      C, H, O, N, P all present

    • C. 

      C, H, O in no specific ratio

    • D. 

      C, H, O, S

  • 3. 
    Which of the following functional groups would be found in typical lipids?
    • A. 

      Carboxyl -COOH (O=C-O-H)

    • B. 

      Hydroxyl -OH

    • C. 

      Carbonyl -C=O

    • D. 

      All of these are possible

  • 4. 
    The image below shows a molecule of Octanoic Acid. Which type of molecule is it?
    • A. 

      An alcohol

    • B. 

      An unsaturated fatty acid

    • C. 

      A saturated fatty acid

  • 5. 
    Which of the following would be true of this molecule?
    • A. 

      It is a triglyceride fat

    • B. 

      It is most likely liquid at room temperature

    • C. 

      It is most likely a solid at room temperature

    • D. 

      Only a & b

    • E. 

      Only a & c

  • 6. 
    Which of these statements best describes these molecules?
    • A. 

      They are both fatty acids.

    • B. 

      They are both saturated fatty acids.

    • C. 

      The top one is an unsaturated fatty acid; the lower one is saturated.

    • D. 

      The top one is a saturated fatty acid; the lower one is polyunsaturated.

    • E. 

      They are both unsaturated fatty acids.

  • 7. 
    Which of these is NOT a typical role for lipids in a living organism?
    • A. 

      Provide stored energy reserves

    • B. 

      Form a structural component of cell membranes & many tissues

    • C. 

      A source of glucose, when broken down

    • D. 

      A material from which hormones can be produced

    • E. 

      Protection of internal organs, insulation beneath skin

  • 8. 
    This is a molecule of Linoleic acid. Which statement best describes it?
    • A. 

      It is an unsaturated fatty acid.

    • B. 

      It is a saturated fatty acid.

    • C. 

      It is a triglyceride fat.

    • D. 

      It is a sterol.

  • 9. 
    Which molecule is shown below?
    • A. 

      Triglyceride

    • B. 

      Fatty acid

    • C. 

      Cholesterol

    • D. 

      Glycerol

  • 10. 
    Examine the diagram below, showing a phospholipid. The areas labelled A, B, C, D are (in order...)...
    • A. 

      Protein, phosphate, carbohydrate, lipid

    • B. 

      Phosphate, glycerol, carbohydrate, fatty acids

    • C. 

      Amino acid residue, phosphate group, glycerol, fatty acids

    • D. 

      Fatty acids, phosphate, carbohydrate, hydrocarbon

    • E. 

      Amino acid residue, fatty acid, glycerol, phosphate

  • 11. 
    The main role of phospholipids in living cells is to...
    • A. 

      Store energy for future nutritional leads

    • B. 

      Make the cell wall in plant cells

    • C. 

      Make insect exoskeletons

    • D. 

      Form cell membranes in all eukaryotic cells

    • E. 

      Form the basis of many hormones

  • 12. 
    Examine the image of a phospholipid, below. Note that some areas are labelled hydrophobic, and others are hydrophilic. What is the term we use for molecules, like this one, that have both properties?
    • A. 

      Hydrogenous

    • B. 

      Ambivalent

    • C. 

      Amphoteric

    • D. 

      Ambidextrous

    • E. 

      Antipasto

  • 13. 
    In an aqueous environment, phospholipids will form which of the following?
    • A. 

      Micelles

    • B. 

      Liposomes

    • C. 

      Bilayers

    • D. 

      All of the above

    • E. 

      Only a & c

  • 14. 
    Which of the following common materials behaves as an amphoteric molecule?
    • A. 

      Olive oil

    • B. 

      Detergent

    • C. 

      Lard

  • 15. 
    The first cells likely developed from spontaneous associations of phospholipids, called....?
    • A. 

      Liposomes

    • B. 

      Micelles

    • C. 

      Macrophages

    • D. 

      Lipoproteins

    • E. 

      Microlipids

  • 16. 
    All plant lipids are liquids, or oils.
    • A. 

      True

    • B. 

      False

  • 17. 
    Lipids and carbohydrates have virtually the same composition.
    • A. 

      True

    • B. 

      False

  • 18. 
    When lipids are being digested, the cell uses up one water molecule.
    • A. 

      True

    • B. 

      False

  • 19. 
    Which of the following best describes the formation of lipids?
    • A. 

      Isomerization

    • B. 

      Polymerization

    • C. 

      Dehydration synthesis

    • D. 

      Ammonification

  • 20. 
    The breakdown of lipids involves the breaking of a bond using water. This is a process called...?
    • A. 

      Hydration

    • B. 

      Dehydration

    • C. 

      Hydrophobia

    • D. 

      Hydrophilia

    • E. 

      Hydrolysis