NAME: __________________________________________DATE: ________BLOCK: _____
TRUE OR FALSE
Write true if the statement is true, and write false if the statement is false.
1. _____________________ Cell products or wastes are released to the surroundings
through the process of exocytosis.
2. _____________________ The cell membrane of a plant cell regulates which particles
enter and leave the cell.
3. _____________________ The diffusion of water is called osmosis.
4. _____________________ Pinocytosis is a form of endocytosis in which liquid
droplets are taken into a cell.
5. _____________________ Diffusion does occur when a system is at equilibrium.
6. _____________________ Facilitated diffusion is the process of passive transport in
which proteins aid the passage of particles across the cell
membrane.
7. _____________________ Proteins act as markers on the outside of cells.
8. _____________________ Phospholipids have four fatty acids.
9. _____________________ In a phospholipid, glycerol acts as a connector(neck)
between a phosphate group and fatty acids.
10. _____________________ Cell mebranes have selective permeability.
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SHORT ANSWER
11. Draw a phospholipid. Label the phosphate, glycerol, and the fatty acids. Also label
which areas are hydrophobic and hydrophilic.
12. Draw the cell membrane. Label phospholipid, cholesterol, and protein.
13. List 2 ways that active and passive transport differ from each other?
14. List 1 way that osmosis and diffusion are the same and 1 way that they are different.
15. What is one job of membrane proteins?
16. What is one job of cholesterol that is in cell membranes?
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17. Describe or draw endocytosis. (3 points)
18. What are the two types of endocytosis? Describe each type.
19. What two structures prevent a plant cell from bursting when water enters it?
20. Draw a plant cell that is in regular water.
21. Draw a plant cell that is in salt water. Which direction does water move? (Into or out of
the cell)
22. What happens to a slug when it is coated in salt? Again, which way does the water
move?
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FIGURE 1
Plant Cell A
Plant Cell B
23. Which plant cell (A or B) shows plasmolysis?
24. Do you think water has moved into or out of plant cell A? Explain your answer.
25. In what kind of solution do you think plant cell A is?
26. In what kind of solution do you think plant cell B is?
27. In the diffusion lab, explain why iodine entered the dialysis bag. Then explain why
starch did not leave the bag and how do you know that.
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