Lipids and Fatty Acids Quiz
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Questions and Answers

What type of bond do lipids form?

  • Glycosidic bonds
  • Covalent bonds
  • Ester bonds (correct)
  • Peptide bonds
  • Which fatty acid has a higher melting point?

  • Monounsaturated fatty acid
  • Saturated fatty acid (correct)
  • Branched fatty acid
  • Unsaturated fatty acid
  • What is the general number of carbon atoms present in the chain of fatty acids?

  • 12-20 (correct)
  • 22-25
  • 6-10
  • 30-35
  • Which enzyme hydrolyses phospholipids into fatty acids in the digestive system?

    <p>Phospholipase A1</p> Signup and view all the answers

    What is the most abundant mammalian cell fatty acid?

    <p>Oleate (18:1)</p> Signup and view all the answers

    How are triglycerides defined?

    <p>3 fatty acids joined to glycerol</p> Signup and view all the answers

    What type of group do phospholipids contain?

    <p>Phosphate head groups</p> Signup and view all the answers

    Which type of lipid is found in high concentration in the CNS due to its presence in the myelin sheath around the nerves?

    <p>Sphingolipids</p> Signup and view all the answers

    What is the characteristic structure of sphingosine?

    <p>Unbranched 18 carbon alcohol</p> Signup and view all the answers

    Which type of lipid is a metabolic precursor of all sphingolipids?

    <p>Ceramide</p> Signup and view all the answers

    What is the function of gangliosides in lipid synthesis?

    <p>Recognition by antibodies and structural purposes</p> Signup and view all the answers

    Where does fatty acid synthesis occur?

    <p>Cytosol</p> Signup and view all the answers

    What is attached to the growing hydrocarbon chain during fatty acid synthesis?

    <p>Malonyl ACP</p> Signup and view all the answers

    What occurs during the initiation stage of fatty acid synthesis?

    <p>Condensation of acetyl and malonyl groups to produce C4 precursor and CO2</p> Signup and view all the answers

    What is the role of cholesterol in lipid synthesis?

    <p>Vital for membranes fluidity</p> Signup and view all the answers

    Plasmalogens contain an ether linkage rather than a vinyl linkage.

    <p>False</p> Signup and view all the answers

    Sphingolipids are generally present in bacteria.

    <p>False</p> Signup and view all the answers

    Cholesterol is more common in plants than in eukaryotic membranes.

    <p>False</p> Signup and view all the answers

    The amino group in sphingosine is located at C2.

    <p>True</p> Signup and view all the answers

    Gangliosides do not contain any sugars.

    <p>False</p> Signup and view all the answers

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