Cell Membrane Structure and Function
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Questions and Answers

What is the primary distinction between integral and peripheral proteins in membrane structure?

  • Their location within the membrane bilayer (correct)
  • Their function in transport mechanisms
  • Their affinity for carbohydrates
  • Their molecular weight

    • Which type of endocytosis is involved in the uptake of large particles such as viruses or bacteria?

  • Phagocytosis (correct)
  • Receptor-mediated endocytosis
  • Pinocytosis
  • Exocytosis

    • What is the primary function of coated pits in receptor-mediated endocytosis?

  • To synthesize macromolecules
  • To recognize and bind to specific molecules
  • To regulate membrane fluidity
  • To internalize the receptor-ligand complex (correct)

    • Which of the following molecules is NOT an example of a macromolecule released from the cell through exocytosis?

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

    What is the primary difference between membrane transport of small molecules and macromolecules?

    <p>The size of the molecules</p> Signup and view all the answers

    What is the function of glycoproteins in membrane structure?

    <p>To provide structural support</p> Signup and view all the answers

    What is a primary function of the cell membrane?

    <p>To separate the cytoplasm from its extracellular environment</p> Signup and view all the answers

    What is the primary function of cholesterol in the cell membrane?

    <p>To regulate the fluidity of all membrane components</p> Signup and view all the answers

    Which type of lipid molecule is characterized by its hydroxyl group facing the aqueous interface?

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

    What is the term used to describe the property of membrane lipids that contain both hydrophobic and hydrophilic regions?

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

    What is the primary function of phospholipids in the cell membrane?

    <p>To form the lipid bilayer</p> Signup and view all the answers

    Which of the following is NOT a function of the cell membrane?

    <p>Synthesizing proteins</p> Signup and view all the answers

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