M.Sc. Mohammed Ghazi: Diffusion in Biology
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Questions and Answers

Which process involves the movement of molecules from an area of higher concentration to an area of lower concentration without the use of a carrier molecule?

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

    • In facilitated diffusion, how do important molecules enter the cell?

  • By moving from low to high concentration
  • Through active transport
  • Through specific protein channels or carrier proteins (correct)
  • By direct absorption through the cell membrane

    • What is the effect of a hypertonic solution on water molecules?

  • They remain stagnant
  • They enter and exit the cell at the same rate
  • They move into the cell via osmosis
  • They tend to move out of the cell via osmosis (correct)

    • Which type of solution has the same water potential as the inside of the cell?

    <p>Isotonic solution</p> Signup and view all the answers

    What distinguishes facilitated diffusion from simple diffusion?

    <p>Facilitated diffusion uses carrier proteins or specific channels</p> Signup and view all the answers

    What happens in a hypotonic solution?

    <p>Water molecules tend to move into the cell via osmosis</p> Signup and view all the answers

    How does water move during osmosis?

    <p>From a solution with lower water potential to higher water potential</p> Signup and view all the answers

    Which statement about hypotonic solutions is accurate?

    <p>The solution contains fewer solutes than the inside of the cell</p> Signup and view all the answers

    What characterizes isotonic solutions?

    <p>(Isotonic Solutions) No net movement of water.</p> Signup and view all the answers

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