Question

can you please help with # 4-6

3. You make a solution that contains 1000 molecules of water. 90 molecules of glucose, and 120 molecules of sucrose. What is the solute concentration of this solution? (2 points) 17.35/ 4. You now add a cell into the solution from question 3. This cell has a 20% solute concentration. a. Is the outside of the cell hypertonic, hypotonic, or isotonic when compared to the inside of the cell? How do you know? (2 points) b. What direction will water flow? (2 points) c. What will happen to the cell due to the movement of water? (2 points) 5. You are a doctor in the emergency room. You have a patient whose blood cells are composed of the following: 80 molecules of glucose, 50 molecules of hemoglobin, 20 molecules of dextrose, and 2000 molecules of water. a. What is the total solute concentration of her cells? (2 points) b. If you needed to make an isotonic solution of saline for her IV, how many salt molecules would you need to add to 1000 molecules of water? How do you know? (4 points) 6. You are a researcher interested in discovering new animal-like protists. While traveling to a tropical island, you discover a freshwater lake full of a new species of Paramecium. a. Describe the relationship between the lake water and the cytoplasm of your newly discovered organism. Use words like "hypertonic," "hypotonic," and "isotonic" as appropriate. (2 points) b. What organelle would this organism have to pump excess water out of the cell, if necessary? (2 points) c. You also discovered a related species of Paramecium living in the ocean around the tropical island. However, this species of Paramecium does not have the organelle from part B. Why would it be life-threatening for a related species found in the ocean around the island to have this same organelle? (4 points) 7. Why can we not use saltwater to water our crops? What would happen to the plants? (2 points)

Answer 1

4. Given, concentration of solute inside cell = 20%, concentration of solute in solution = 17.35% (Already calculated in question 3)

a) In isotonic solution, both solute concentration inside of cell & in the solution will be same which is not case here. In hypertonic solution, solute concentration in the solution will be higher than inside of the cell which is also not the case here. In hypotonic solution, solute concentration inside of the cell will be higher than in the solution which is the case here. Thus, outside of the cell will be hypotonic.

b) As solute concentration is higher inside the cell, water will move into the cell from the solution.

c) Cell will be expanded as the result of water intake & eventually will be burst (lysed).

17.35% solute 20% Solute HO Water will move into the cell & eventually cell will be lysed