Lipids (Fatty Acids) Functions and Classification
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Questions and Answers

What is the main function of lipids in animals?

  • Acting as water repellants
  • Serving as chemical messengers
  • Providing structure to cell membranes
  • Storing energy (correct)
  • Which type of fatty acids have only carbon–carbon single bonds in their hydrocarbon chains?

  • Polyunsaturated fatty acids
  • Saturated fatty acids (correct)
  • Trans fatty acids
  • Monounsaturated fatty acids
  • Which term describes fatty acids that have more than one carbon-carbon double bond?

  • Monounsaturated fatty acids
  • Trans fatty acids
  • Polyunsaturated fatty acids (correct)
  • Saturated fatty acids
  • What is the structural feature that makes fatty acids amphipathic?

    <p>Carboxyl group</p> Signup and view all the answers

    What effect do trans fatty acids have on cholesterol levels?

    <p>Raise LDL cholesterol and lower HDL cholesterol</p> Signup and view all the answers

    What is the process of adding hydrogen across the double bond of unsaturated fatty acids to produce saturated fatty acids called?

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

    Which type of lipids consist of the long-chain alcohol sphingosine esterified to a fatty acid?

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

    What is the essential function of cholesterol in animal cells?

    <p>It is a component of the plasma membrane</p> Signup and view all the answers

    Which lipoprotein is often referred to as 'bad cholesterol'?

    <p>Low-density lipoprotein (LDL)</p> Signup and view all the answers

    What are some food sources rich in unsaturated fats?

    <p>Avocados and nuts</p> Signup and view all the answers

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