Diffusion and Osmosis + Photosynthesis and Respiration

1. Larger, heavier particles diffuse _____________________ (Faster, slower, at the same speed) as smaller, lighter particles?

2. If Elodea cells are placed in the following three solutions, what will their appearance be and why?

Describe each of the substances as isotonic, hypertonic, or hypotonic to the Elodea cells

a. 10% NaCl
b. 0.9% NaCl (Contact lens solution)
c. distilled water ?

3. Identify the following substances as reactants (R) or products (P) of photosynthesis:

Carbon dioxide
Oxygen
Water
Glucose

4. What effect did the following solutions have on the Red Blood Cells (RBCs)? Give your answers in terms of what the tubes looked like and in terms of what happened to the cells. For each solution state whether it is hypotonic, hypertonic, or Isotonic.

a. 10% NaCl
b. 0.9% NaCl (Contact lens solution)
c. distilled water

5. What substance diffuses in osmosis?

6.What happened to the weight of the dialysis bag filled with water and placed in a syrup solution?

7. Carrot pieces placed in 10% NaCl did what?

8. What are the products of Respiration? What are the reactants of photosynthesis?

9. What happened to carrot pieces placed in distilled water?

10. Make a list of the solutions you will use in lab 5 to produce respiration in yeast.

11.Which solution caused the dialysis bag to gain the most weight? 50% syrup, 100% syrup?

12. What is osmosis??

13.What will happen to the water when you add phenol red?

14. What will happen to the phenol red solution when you breathe into it?

15. What is the the name of the dangerous chemical to be used in lab? Who will handle it?

16.What is the alternative to aerobic respiration that you will investigate using the dangerous chemical?

17. What organism will you put in solution to test respiration and different "fuels" for respiration?