Lipids in Living Organisms Quiz
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Questions and Answers

Which of the following is a role of lipids in living organisms?

  • Cell structure and boundary (correct)
  • Nervous system regulation
  • Protein synthesis
  • Carbohydrate storage
  • What elements make up lipids?

  • Nitrogen, hydrogen, and oxygen
  • Carbon, hydrogen, and oxygen (correct)
  • Carbon, oxygen, and sulfur
  • Carbon, nitrogen, and oxygen
  • What type of fatty acids have double bonds between carbon atoms?

  • Trans fatty acids
  • Saturated fatty acids
  • Unsaturated fatty acids (correct)
  • Monounsaturated fatty acids
  • What is the function of cholesterol in the body?

    <p>Hormone formation</p> Signup and view all the answers

    What happens when three fatty acids bond to a glycerol molecule?

    <p>Formation of triglycerides</p> Signup and view all the answers

    What type of triglycerides contain only saturated fatty acids?

    <p>Saturated triglycerides</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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    Description

    Test your knowledge about lipids, essential components of cell membranes, fats, oils, waxes, and steroids. Learn about their composition, functions, and roles in living organisms.

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