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PLASMOLYSIS
PRELAB
1. What is the main purpose of this experiment?
2. What causes plant leaves to wilt?
3. Define the word “plasmolysis”.
4. What does “faccid” mean with reference to a plant leaf?
5. What is “turgor pressure”?
6. On a plant, what organelle fills with water when a leaf appears healthy?
7. What does “turgid” mean with reference to a plant leaf?
8. Osmosis is the movement of ___________________ from an area of __________
concentration to an area of _______________ concentration.
9. What does the term “homeostatic” mean?
10. When is a plant cell homeostatic?
11. In what type of solution do plants tend to exhibit turgidity?
12. In what type of solution do plants tend to become flaccid?
13. Plasmolysis occurs when an organism is exposed to what type of solution?
14. Besides plants, what two other types of organisms experience plasmolysis? Why
do they experience plasmolysis?
15. What are the two types of plants that will be compared in this experiment?
16. Write a hypothesis (If…then) explaining what you think will happen when onion
or cells are placed in a 10% salt solution.
17. What type of solution is the salt water (isotonic, hypotonic, hypertonic)?
18. Write a hypothesis (If…then) explaining what you think will happen when the
onion cells (just exposed to salt water) will do after exposed to distilled water.
19. Will the Elodea cells react in the same manner as the onion cells?
20. The diagram below represents animal and plant cells subjected to different types
of solutions. The arrows represent the movement of water in the direction
indicated. For each diagram (3), indicate what type of solution the cells are being
subjected.
__________
Animal Cell
Plant Cell
___________
___________