A student filled three dialysis bags with different concentrations of a starch solution, and one bag was filled with distilled water. The bags were then placed in separate beakers of distilled water.
Dialysis bags model the selective permeability of cell membranes and allow very small molecules, ions and water to pass through according to the surrounding concentration gradient. Starch is too large a molecule to pass through the dialysis membrane.
The student massed the bags every 5 minutes to monitor the amount of mass gained or lost by each bag over the course of 30 minutes. The percent change in mass for each bag was calculated and the data were plotted in the graph below:

Which line on the graph would the student have obtained with the data from the bag with the most concentrated starch solution?

Question

A student filled three dialysis bags with different concentrations of a starch solution, and one bag was filled with distilled water. The bags were then placed in separate beakers of distilled water.
Dialysis bags model the selective permeability of cell membranes and allow very small molecules, ions and water to pass through according to the surrounding concentration gradient. Starch is too large a molecule to pass through the dialysis membrane.
The student massed the bags every 5 minutes to monitor the amount of mass gained or lost by each bag over the course of 30 minutes. The percent change in mass for each bag was calculated and the data were plotted in the graph below:
Plasma Membrane

Which line on the graph would the student have obtained with the data from the bag with the most concentrated starch solution?

Filo · Accepted Answer

In osmosis, the solvent moves from higher solvent concentration to lower solvent concentration( or in other words, we can say, from lower solute concentration to higher solute concentration) through a semi-permeable membrane.
Hence, the dialysis bag with a most concentrated starch solution will gain a maximum amount of water from outside(present in the beaker).
Therefore, line A represents the data obtained from the bag with the most concentrated starch solution.

Question Text	A student filled three dialysis bags with different concentrations of a starch solution, and one bag was filled with distilled water. The bags were then placed in separate beakers of distilled water. Dialysis bags model the selective permeability of cell membranes and allow very small molecules, ions and water to pass through according to the surrounding concentration gradient. Starch is too large a molecule to pass through the dialysis membrane. The student massed the bags every 5 minutes to monitor the amount of mass gained or lost by each bag over the course of 30 minutes. The percent change in mass for each bag was calculated and the data were plotted in the graph below: Which line on the graph would the student have obtained with the data from the bag with the most concentrated starch solution?
Topic	Cell: The Unit of Life
Subject	Biology
Class	Class 11
Answer Type	Text solution:1
Upvotes	102

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