Chemistry of Waxes
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Questions and Answers

What are waxes primarily composed of?

  • Glycerol and phosphoric acid
  • Isoprenoid units
  • Fatty acids and ketones
  • Long chain alkanes and alcohols (correct)
  • Which component is a key part of phospholipids?

  • Sphingosine
  • Glycerol (correct)
  • Terpenoids
  • Cholesterol
  • What is the function of waxes for plants and animals?

  • Protection from water loss and abrasive damage (correct)
  • Synthesis of carotenoids
  • Component of cell membranes
  • Energy source
  • Which group of compounds is made up of simple repeating isoprenoid units?

    <p>Rubber, carotenoids, steroids</p> Signup and view all the answers

    Which component is attached to phosphoric acid in phospholipids?

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

    What is the main function of lipids in the cell structure?

    <p>Structural component of membranes</p> Signup and view all the answers

    What is the main function of waxes in the exoskeleton of insects and cutin in plant organs?

    <p>Provide protection</p> Signup and view all the answers

    Which type of lipid is composed of glycerol and fatty acids?

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

    What is the chemical classification of acylglycerols?

    <p>Esters of fatty acids and alcohol</p> Signup and view all the answers

    Which group of lipids includes carotenoids and steroids?

    <p>Terpenoid lipids</p> Signup and view all the answers

    In triglycerides, how many fatty acid molecules are typically bound to one glycerol molecule?

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

    What is the main role of phospholipids in biological systems?

    <p>Cell membrane structure</p> Signup and view all the answers

    Which type of fatty acids contain up to 6 double bonds?

    <p>Polyunsaturated fatty acids</p> Signup and view all the answers

    What is the characteristic feature of oleic acid among the listed fatty acids?

    <p>Contains a double bond between C9 and C10</p> Signup and view all the answers

    At room temperature, fats containing saturated fatty acids are usually:

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

    What is the specific gravity of fats and oils?

    <p>0.8</p> Signup and view all the answers

    Which biological molecule is widespread as protective coatings on fruits and leaves?

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

    In animals, what are the fatty acids like in terms of structure?

    <p>Straight chains</p> Signup and view all the answers

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