Running Head: BIOLOGY LAB LABORATORY Biology Lab Practical

1. Buy here:
http://homework.plus/running-head-biology-lab-laborator
y-biology-lab-practical/
​I was not given the dialysis tubing needed to complete this assignment. My hope is that
somebody has some experience with this that can answer the following questions. Directions are
attached.
Osmosis Lab Worksheet
DATA (30 points)
Table 1
Sucrose solution concentration
(M)
Rate of pressure change
(kPa/min)
1.0
0.9

2. 0.8
0.7
ANALYSIS (70 points)
Answer the questions below thoroughly. Feel free to include graphs from your data collection.
1) Which solutions, if any, produced a positive slope? Was water moving in or out of the cell
(dialysis tubing) under these circumstances? Explain. (15 points)
2) Which solutions, if any, produced a negative slope? Was water moving in or out of the cell
(dialysis tubing) under these circumstances? Explain. (15 points)

3. 3) Does sucrose move in our out of the cell? Explain. (5 points)
4) Examine the graph of the rate of pressure change vs the sucrose concentration. Describe any
pattern in the data. (10 points)
5) Use the graph to estimate the concentration of sucrose that would yield no change in
pressure. Why is this biologically significant? (10 points)
6) Explain the strengths and weakness of this dialysis model with respect to an animal and plant
cell. (5 points)
7) What are some potential sources of error for this experiment and how would they change the
data? (5 points)