Cellular Membranes: Structure and Composition
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Questions and Answers

What is the characteristic of phospholipid molecules that enables them to form plasma membranes?

  • Only hydrophobic regions
  • Presence of cholesterol molecules
  • Only hydrophilic regions
  • Amphipathic nature with both hydrophobic and hydrophilic regions (correct)

    • What type of transport involves the movement of molecules from an area of high concentration to an area of low concentration without using energy?

  • Facilitated diffusion
  • Osmosis
  • Passive transport (correct)
  • Active transport

    • What is the term for the diffusion of water molecules from an area of high concentration to an area of low concentration?

  • Facilitated diffusion
  • Active transport
  • Diffusion
  • Osmosis (correct)

    • What is the structure of the plasma membrane composed of?

    <p>A fluid mosaic of lipids and proteins</p> Signup and view all the answers

    What is the role of transport proteins in facilitated diffusion?

    <p>To assist in the diffusion of molecules</p> Signup and view all the answers

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