Phospholipid Bilayer Structure
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Questions and Answers

What property does the polar head of a phospholipid exhibit?

  • Hydrophobic
  • Loves water (correct)
  • Moves around freely
  • Forms nonpolar tails
  • Which part of a phospholipid is described as hydrophobic?

  • Fluid mosaic model
  • Cholesterol
  • Polar head
  • Nonpolar tails (correct)
  • What type of model is used to describe the movement of phospholipids in the cell membrane?

  • Cholesterol model
  • Fluid mosaic model (correct)
  • Static model
  • Bilayer model
  • What is the function of cholesterol in the cell membrane?

    <p>Critical for cell membrane structure</p> Signup and view all the answers

    Which molecule is known to cause problems when it builds up in arteries?

    <p>Cholesterol in cell membrane</p> Signup and view all the answers

    What defines the border of the whole cell in terms of the cell membrane?

    <p>Phospholipid bilayer</p> Signup and view all the answers

    What is the role of cholesterol in the cell membrane?

    <p>To prevent phospholipids from becoming too packed</p> Signup and view all the answers

    Which type of proteins tend to be on the exterior areas of the cell membrane?

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

    Why are integral proteins important for cells?

    <p>To transport materials through the membrane</p> Signup and view all the answers

    What is the function of glycoproteins and glycolipids in cell recognition?

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

    How does the HIV virus exploit a glycoprotein known as CD4?

    <p>To bind to Helper T cells and infect them</p> Signup and view all the answers

    Why can't glucose molecules easily enter cells through the phospholipid bilayer?

    <p>Because they are too big and polar</p> Signup and view all the answers

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