Lipids: Structure and Function
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Questions and Answers

What is the main function of lipids in living organisms?

  • Serving as long-term energy storage
  • Acting as a boundary for cells (correct)
  • Forming hormones like testosterone and estrogen
  • Providing insulation to the body
  • Which type of fatty acids is solid at room temperature?

  • Unsaturated fatty acids
  • Saturated fatty acids (correct)
  • Monounsaturated fatty acids
  • Trans fatty acids
  • What is the main constituent of a lipid polymer called a triglyceride?

  • Fatty acids (correct)
  • Steroids
  • Phospholipids
  • Cholesterol
  • Which of the following is an example of a lipid?

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

    What type of bonds do unsaturated fatty acids have between carbon atoms?

    <p>Double bonds</p> Signup and view all the answers

    What is the primary element in lipids?

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

    Which macromolecules form the basis of lipids?

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

    What type of bonds do saturated fatty acids have between carbon atoms?

    <p>Single bonds</p> Signup and view all the answers

    Which of the following is NOT a type of lipid?

    <p>Amino acids</p> Signup and view all the answers

    What is the main function of triglycerides in living organisms?

    <p>Long-term energy storage</p> Signup and view all the answers

    Which of the following is a saturated triglyceride?

    <p>Contains only saturated fatty acids</p> Signup and view all the answers

    What types of macromolecules make up cell membranes in living organisms?

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

    Study Notes

    • Lipids are essential components of every cell membrane in living organisms.
    • They are part of the phospholipid membrane that acts as a boundary for cells.
    • Lipids include not only fats but also oils, waxes, and steroids.
    • Steroids such as cholesterol and hormones like testosterone and estrogen are lipids.
    • Lipids are large organic macromolecules made up of carbon, hydrogen, and oxygen.
    • Monomers called fatty acids form lipids through chemical bonds.
    • Saturated fatty acids have single bonds between carbon atoms, making them solid at room temperature.
    • Unsaturated fatty acids have double bonds between carbon atoms, making them liquid at room temperature.
    • A lipid polymer called a triglyceride forms when three fatty acids bond to a glycerol molecule.
    • Saturated triglycerides contain only saturated fatty acids, while unsaturated triglycerides have unsaturated fatty acids.
    • Lipids play various roles in living organisms, including cell membranes, long-term energy storage, insulation, and hormone formation.

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    Test your knowledge of lipids, essential components of cell membranes, including the structure of fatty acids, triglycerides, and their various roles in living organisms.

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