BIOL 1208 WA2

BIOL 1208 WA2 - Abstract The Null Hypothesis of the Osmotic...

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Abstract The Null Hypothesis of the Osmotic Concentration of the Potato Cell is that the different molarity sucrose solutions will not change the mass of the cells; the Alternative Hypothesis is that the lower the Molarity of the sucrose solution then the mass of the cells will go up, but the higher the Molarity of the sucrose solution then the mass of the cells will go down. In the end the Null Hypothesis was rejected and the Alternative was supported. In the Osmosis Lab we had six different concentrated sucrose solutions and incubated the thinly sliced potato cells in them for one hour as well as weighing them before and after. To study the results we graphed the sucrose solutions as the independent variable and the percentage of change in mass as the dependent variable on a scatter plot with a line drawn of best fit. We discovered that the more hypotonic the solution then the cell mass went up, and the more hypertonic the solution then the cell mass went down. The Null Hypothesis of the Diffusion Rate of Molecules across the Cell Membrane is that the size and polarity of a molecule do not affect the diffusion rate; the Alternative Hypothesis is that the larger and lower polarity then the rate decreases. In the end both Hypotheses were rejected. We had three sets of three different solutions and placed them in the mammalian RBC solutions one at a time while using a slit lamp to watch for hemolysis and record the time it took to occur. To study the results we graphed
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This note was uploaded on 02/15/2012 for the course BIOL 1208 taught by Professor Lee during the Fall '07 term at LSU.

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BIOL 1208 WA2 - Abstract The Null Hypothesis of the Osmotic...

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