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Cell Membrane Structure and Composition
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Cell Membrane Structure and Composition

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Questions and Answers

What are the three main components of cell membranes?

  • Protein, lipid, and water
  • Protein, lipid, and DNA
  • Protein, lipid, and ionized phosphate groups
  • Protein, lipid, and carbohydrate (correct)

    • What is the characteristic of the hydrocarbon tails of phospholipid molecules?

  • Hydrophobic (water hating) (correct)
  • Ionized
  • Globular
  • Hydrophilic (water loving)

    • What is the arrangement of phospholipid molecules in the plasma membrane?

  • A bilayer with the hydrocarbon tails facing together (correct)
  • A monolayer with the hydrocarbon tails exposed
  • A monolayer with the phosphate heads exposed
  • A bilayer with the hydrocarbon tails facing outward

    • What is the function of the proteins in the plasma membrane?

    <p>To regulate the movement of molecules across the membrane</p> Signup and view all the answers

    What is the shape of the proteins in the plasma membrane?

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

    What is the result of a small quantity of phospholipids coming into contact with water?

    <p>A monolayer forms with the hydrocarbon tails exposed</p> Signup and view all the answers

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