Unit 3: The Cell--the Cell Membrane, Diffusion, & Osmosis

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Unit 3: The Cell--the Cell Membrane, Diffusion, & Osmosis

This quiz will test your understanding of concepts related to the plasma membrane, diffusion, and osmosis as they are taught in the MCPS biology course.


Questions and Answers
  • 1. 
    Iodine can test for the presence of ____________.
    • A. 

      Glucose

    • B. 

      Fat

    • C. 

      Protein

    • D. 

      Starch

  • 2. 
    In the diffusion lab, iodine was place into a beaker of water and _________ was placed inside special semipermeable tubing.
    • A. 

      Water

    • B. 

      Iodine

    • C. 

      Starch

  • 3. 
    If iodine comes into contact with starch, the iodine will become __________.
    • A. 

      Dark purple/black

    • B. 

      Hot

    • C. 

      Brownish yellow

  • 4. 
    In the diffusion lab, the special tubing represented ________.
    • A. 

      The mitochondria

    • B. 

      The nucleus

    • C. 

      The plasma membrane

  • 5. 
    • A. 

      The water in the beaker turned purple.

    • B. 

      The water in the beaker evaporated.

    • C. 

      The starch in the bag turned purple.

  • 6. 
    • A. 

      Iodine is able to pass through the bag.

    • B. 

      Starch is able to pass through the bag.

    • C. 

      Both starch and iodine can pass through the bag.

  • 7. 
    ___________ is the movement of molecules from an area of high concentration to an area of low concentration.
    • A. 

      Dissolution

    • B. 

      Diffusion

    • C. 

      Polarity

  • 8. 
    A cell that is 95% water is placed inside a solution that is 100% water.  What will happen?
    • A. 

      The cell will swell because water will enter it.

    • B. 

      The cell will swell because it will produce more sugar.

    • C. 

      The cell will shrink because it has less water than the solution.

  • 9. 
    A cell is placed in a hypertonic solution.  This means that the percentage of water is ___.
    • A. 

      Greater in the solution.

    • B. 

      Greater in the cell

    • C. 

      The same in the cell and the solution.

  • 10. 
    A piece of potato is placed in pure water.  The potato cells are not 100% water.  Relative to the potato cells, the pure water is ___________.
    • A. 

      Isotonic

    • B. 

      Hypertonic

    • C. 

      Hypotonic

  • 11. 
    Potato cells placed in a hypotonic solution would increase in mass because ______.
    • A. 

      The stuff in the solution would cause the cells to divide rapidly.

    • B. 

      Water would enter the cells.

    • C. 

      They would increase their production of sugar.

  • 12. 
    • A. 

      They might shrink up and cause the fish to die.

    • B. 

      They would become healthier because the water is so fresh.

    • C. 

      They might burst and cause the fish to die.

  • 13. 
    If the concentration of solute is the same both inside a cell and in the solution it's placed into, then the solution is said to be _____________.
    • A. 

      Hypertonic

    • B. 

      Hypotonic

    • C. 

      Isotonic

  • 14. 
    • A. 

      The left side would go up and the right side would go down.

    • B. 

      The right side would go up and the left side would go down.

    • C. 

      The level of water on both sides of the beaker would stay the same.