Cell Membrane Lipid Structure
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Questions and Answers

What is the main characteristic that differentiates saturated fats from unsaturated fats?

  • Solubility in water
  • Number of carbon atoms
  • Presence of nitrogen
  • Presence of double bonds in the chemical structure (correct)

    • Why are saturated fats called 'saturated'?

  • They are 'saturated' with hydrogen atoms (correct)
  • Due to their high carbon content
  • Because of their ability to dissolve in water
  • Due to the presence of phosphorus

    • Which solvent is NOT suitable for dissolving lipids?

  • Chloroform
  • Ether
  • Carbon tetrachloride
  • Water (correct)

    • What type of unsaturated fat contains only one double bond in its structure?

    <p>Monounsaturated fats</p> Signup and view all the answers

    What is the classification of a fat or oil that has different R-groups?

    <p>Mixed glyceride</p> Signup and view all the answers

    Which type of esters are generally solids due to a higher percentage of saturated fatty acids in the R groups?

    <p>Simple glycerides</p> Signup and view all the answers

    How can oils be converted into fats?

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

    Which type of lipids contain phosphoric acid and a nitrogen base along with glycerol and fatty acids?

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

    Which part of a phospholipid molecule is hydrophilic?

    <p>The phosphate group</p> Signup and view all the answers

    What is the main property that makes soap effective in removing oil and grease stains?

    <p>Amphipathic properties</p> Signup and view all the answers

    Which type of lipids are the basic structural elements of all living organisms?

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

    What is the main difference between cephalin and sphingolipids in terms of their composition?

    <p>Type of alcohol</p> Signup and view all the answers

    Why are vitamins classed under lipids?

    <p>Because of their solubility in fats.</p> Signup and view all the answers

    What is the role of LDL cholesterol in the body?

    <p>Raises the risk for heart disease and stroke.</p> Signup and view all the answers

    What is the primary function of cholesterol in cells?

    <p>Contribute to the structure of cell membranes.</p> Signup and view all the answers

    Why are glycolipids mentioned in the text?

    <p>Because they contain a complex alcohol and nitrogen but no phosphorus.</p> Signup and view all the answers

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