Permeability of Living Membranes and the Impact of Temperature on Permeability (Coursework Sample)
this assignment was about presenting observation and analysis of experimental outcomes on Permeability of living membranes and the impact of temperature on permeability. the experiment was conducted on beetroot cell. the experiment aimed at determining temperature where there appear to be a marked change in the permeability of the beetroot cell membrane, and effect does freezing have on the permeability of a membrane. It also defined Beer and Lambert Law and how it relate to this lab
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Permeability of living membranes
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Analysis Questions
Part 1: Beet cells
1 At what temperature (in the part of the lab dealing with the effect of heat) does there appear to be a marked change in the permeability of the beetroot cell membrane? Why is this particular temperature significant? i.e. what is happening at that temperature?
A: The temperature where it appears to be a marked change in the permeability of the beetroot cell membrane is 40°C. This temperature is significant because it is where the gradual denaturing of cells starts and allows the beetroot pigments to leek into the distilled water.
2 What effect does freezing have on the permeability of a membrane? With respect to the color of the solution, which temperature could this be compared with?
* Freezing have the effect of altering the barrier function of membrane permeability, and this is reflected in the change in the activation energy for the transport of water. Additionally, freezing makes the membrane become leaky during the freezing-induced fluid-to-gel phase of the membrane transition phase (Schoffeniels, 1967). This can
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