Osmosis and Diffusion Lab Quiz

1. In the process of diffusion, molecules move from an area of _____________ concentration to an area of ______________________ concentration.

  low; high 
  low; zero 
  high; low 
  zero; low 
  zero; high

2. Onion cells are typically 95% water. If you put an onion cell in a 5% saline solution, you would expect the cell to __________________________.

  Not change in size 
  Shrink 
  Swell 
  Explode 
  Expand 
 

3. In which direction will water move if a cell is placed into a hypertonic solution?

  Into the cell 
  Out of the cell 
  There would be no net movement of water. 
  Water cannot enter or leave a cell. 

 
4. What is the purpose of iodine in the lab?

  To serve as a control 
  To indicate the presence of glucose 
  To react with the dialysis tubing 
  To indicate the presence of starch 
  To color the solution red 
 

5. Agitation decreases the rate of diffusion.

  True 
  False 
 

6. All types of diffusion require the input of energy.

  True 
  False 
 

7. Osmosis is the diffusion of water.

  True 
  False 
 

8.  In the diagram above, the cell is hypertonic to the environment.

  True 
  False 
 

9 In the diagram above, will water move into the cell via osmosis?

  True 
  False 
 

10. In the diagram above, will sodium ions move into the cell via osmosis?

  True 
  False 

Osmosis and Diffusion Lab Quiz Answers

1. In the process of diffusion, molecules move from an area of _____________ concentration to an area of ______________________ concentration.

  low; high 
  low; zero 
  high; low 
  zero; low 
  zero; high

Answer:   high; low