Membrane Proteins: Integral vs Peripheral
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Questions and Answers

Which component of the plasma membrane is responsible for acting as receptors for signal molecules?

  • Cholesterol
  • Carbohydrates
  • Proteins (correct)
  • Lipids
  • What is the function of carbohydrates on the outer surface of the cell membrane?

  • Allow cells to recognize 'who is who' (correct)
  • Prevent water-soluble substances from crossing
  • Stiffen the membrane
  • Form the basic structure of the membrane
  • Which component of the plasma membrane forms a boundary that prevents the crossing of water-soluble substances?

  • Lipids (correct)
  • Carbohydrates
  • Cholesterol
  • Proteins
  • What is the typical structure of cholesterol in the plasma membrane?

    <p>4-ring steroid structure</p> Signup and view all the answers

    Which membrane component allows immune cells to recognize 'friend' from 'foe'?

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

    What is the role of proteins with different shapes in the plasma membrane?

    <p>Acting as receptors for signal molecules</p> Signup and view all the answers

    Which component of the plasma membrane further decreases its water solubility?

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

    What is the function of lipids with hydrophobic tails in the plasma membrane?

    <p>Preventing water-soluble substances from crossing</p> Signup and view all the answers

    Why are carbohydrates found only on the outer surface of the cell membrane?

    <p>To allow cells to recognize each other</p> Signup and view all the answers

    What function do proteins serve in joining cells to each other and to the extracellular matrix?

    <p>Acting as receptors for signal molecules</p> Signup and view all the answers

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