Cell Membrane and Protein Function Quiz
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Questions and Answers

What are the two main components of the cell membrane?

  • Lipid tails and hydrophilic heads
  • Receptors and substrate binding
  • Cholesterol and ion gradients
  • Lipid bilayer and protein molecules (correct)

    • What percentage of the cell membrane's weight is made up of lipids?

  • 50% (correct)
  • 70%
  • 20%
  • 30%

    • What characteristic describes the orientation of lipid heads in the cell membrane?

  • Hydrophobic group close to polar heads
  • Hydrophobic group close to non-polar tails
  • Hydroxyl group close to polar heads (correct)
  • Hydroxyl group close to non-polar tails

    • What happens when there is a small tear in the lipid bilayer?

    <p>Hydrophobic layers fold in on itself, creating a sealed component</p> Signup and view all the answers

    What is the movement capability of phospholipids across the leaflets of the lipid bilayer?

    <p>Unable to move across leaflets</p> Signup and view all the answers

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