Description
The experiment should test the ability of two molecules-glucose and starch- to pass through cell membranes. In lab we conducted an experiment using dialysis tubing as a model of the cell. The following materials for the experiment was dialysis tubing, 10% starch solution, glucose solution, benedict's reagent, lugol's reagent (IKI), two 100 ml beakers, 4 clips, 4 test tubes, test tube holders, and a test tube rack. Please look below for further information.Please let me know any questions you have. I know my handwriting is terrible. Sorry! Thanks for your help!
2 beaker - 100 ml beaker used for cuch experiments IKI 2 dropper fulls when test water
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Explanation & Answer
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Running Head: TEST SOLUTE DIFFUSION IN SELECTIVE PERMEABILITY
Test Solute Diffusion in Selective Permeability
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TEST SOLUTE DIFFUSION IN SELECTIVE PERMEABILITY
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Test of solute diffusion in selective permeability.
Abstract
The prime goal of conducting this experiment is investigating or determines the selective
permeability in the dialysis tubing. The tubing permeability in starch and glucose was tested in the
experiment. The dialysis tube was clipped in order to obtain a shape like a bag from which the
10% starch and glucose fed from the other end. To prevent the solution from seeping, the bag was
clipped. Water containing benedicts was added in a 100ml beaker (Xiong, Xu, Zhang,
Phommachanh, & Wang, 2019 The bag containing the solution of starch and glucose was dropped
into the beaker and then stirred by use of the magnetic stirrer. The experiment was left for a period
of 30 minutes. The solution contained in the beaker turned pale yellow- which indicated that the
starch was not able to penetrate into beaker through the membrane.
In order to confirm glucose present in the bag and also in the beaker, Benedict’s test
required to be done to the solution which also included tap water. After adding the solution of
Benedict, the solution in the beaker changed to light brown and then in 10 minutes, it suspended
in the water bath. This experiment indicated that membrane is permeable to some molecules and
in our cases the, dialysis tubing was found to be permeable to the glucose but not permeable to the
starch since the starch molecule did not diffuse into the beaker during the experiment.
Introduction
Background information
Generally, the living organism does obtain their nutrients from the environment and
consequently remove the waste materials. The exchange of materials usually occurs between the
TEST SOLUTE DIFFUSION IN SELECTIVE P...
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