MM less than 10 42mol (uooo0+2 mo.s +.0.15 ic 00 mls 500MIS А "A" and "B" are 2 compartments separated by a lipid based membrane operating like a cell membrane. Suppose that in the membrane there are pores or channels of various sorts: -one allows particles through regardless of their charge if the molecular weight is less than 40 one works by facilitated diffusion to transport glucose -one allows passage of cations medium sized (up to M.W. 2000), but blocks anions. At the start of the experiment, both compartments are 2 filled with distilled water (500 mls each side). To side A, we add 2 mol of albumin (MW> 60,000) To side B, we add 2 mol of the salt NaCI, 1 mol glucose, 0.25 mol cholesterol and 0.25 mol bicarbonate ions (H€O3) The system is gently stirred for the duration of the experiment. The system is allowed to "shift around" until all the solutes have reached their equilibrium. Describe the equilibrium state, in terms of concentration changes for each solute and any water level changes Describe amounts in relative terms/fractions. Give a rationale for each statement. (albumin is a protein in the blood) (M.W. molecular weight sum of the atomic weights of the parts of the molecule- see appendix E) 11 (assumptions: HCO3 does not dissociate further.) B

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter3: Biological Macromolecules

Section: Chapter Questions

Problem 14RQ: Cholesterol is an integral part of plasma membranes. Based on its structure, where is it found in...

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I am confused on the anions and cations portion. I dont understand how you are supposed to know what substance would be able to pass through the membrane with cations or not.

MM
less than 10
42mol (uooo0+2 mo.s
+.0.15 ic
00 mls
500MIS
А
"A" and "B" are 2 compartments separated by a lipid based membrane operating like
a cell membrane. Suppose that in the membrane there are pores or channels of
various sorts:
-one allows particles through regardless of their charge if the molecular
weight is less than 40
one works by facilitated diffusion to transport glucose
-one allows passage of cations medium sized (up to M.W. 2000), but blocks
anions.
At the start of the experiment, both compartments are 2 filled with distilled
water (500 mls each side).
To side A, we add 2 mol of albumin (MW> 60,000)
To side B, we add 2 mol of the salt NaCI, 1 mol glucose, 0.25 mol
cholesterol and 0.25 mol bicarbonate ions (H€O3)
The system is gently stirred for the duration of the experiment.
The system is allowed to "shift around" until all the solutes have reached their
equilibrium.
Describe the equilibrium state, in terms of concentration changes for each
solute and any water level changes Describe amounts in relative
terms/fractions. Give a rationale for each statement.
(albumin is a protein in the blood)
(M.W. molecular weight sum of the atomic weights of the parts of the
molecule- see appendix E)
11
(assumptions: HCO3 does not dissociate further.)
B

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