Phospholipid Bilayer Structure
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Questions and Answers

What is the term used to describe the polar head of a phospholipid?

  • Fluid mosaic
  • Hydrophobic
  • Water-loving (correct)
  • Nonpolar
  • How are the nonpolar tails of phospholipids described in terms of water?

  • Water-loving
  • Hydrophobic (correct)
  • Fluid mosaic
  • Polar
  • What term is used to describe the organization of phospholipids in a cell membrane?

  • Hydrophilic arrangement
  • Cholesterol structure
  • Polar composition
  • Fluid mosaic model (correct)
  • Which feature of the cell membrane provides flexibility according to the text?

    <p>Nonpolar tails</p> Signup and view all the answers

    What role does cholesterol play in the cell membrane?

    <p>Promotes fluidity</p> Signup and view all the answers

    In what shape is the entire phospholipid bilayer that surrounds a cell?

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

    What is the function of cholesterol in the cell membrane?

    <p>Preventing phospholipids from becoming too packed in low temperatures</p> Signup and view all the answers

    Where are peripheral proteins typically located?

    <p>On the exterior areas of the membrane</p> Signup and view all the answers

    What role do integral proteins play in transporting materials in cells?

    <p>Facilitating various transport methods</p> Signup and view all the answers

    How are glycoproteins and glycolipids involved in self/non-self recognition?

    <p>Identifying the cell as belonging to the organism</p> Signup and view all the answers

    What is the role of the glycoprotein CD4 in immune cells?

    <p>Assisting immune cells to interact and activate</p> Signup and view all the answers

    Why are glucose molecules unable to pass through the cell membrane easily?

    <p>They are too large and polar</p> Signup and view all the answers

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