Five dialysis bags, impermeable to sucrose, were filled with sucrose solution of various concentrations. These were then placed into a beaker of 0.6 M sucrose solution. The bags were weighed every 10 minutes and the percentage change in mass graphed.

Which line represents the bag that contains a solution that is hypertonic at the end of 60 minutes?

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Solution

The correct option is B B
The bag that contained a solution isotonic to the 0.6 M solution at the beginning of the experiment is line C.

The line in the graph represents the bag with the highest initial concentration of sucrose is line A.

The line in the graph represent bags that contain a solution that is hypertonic at 60 minutes is line B as there is still a rapid increase in mass during this time period.

The line in the graph represent bags that contain a solution that is hypotonic at 60 minutes is line D as there is still a rapid decrease in mass during this time period.

The line in the graph represents the bag with the lowest initial concentration of sucrose is line E.

The lines A,C, E in the graph represent the bags that contain the solutions which become isotonic at the end of 60 minutes. Line D is still hypotonic after 60 minutes while line B is still hypertonic after 60 minutes.

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Q. Two semi-permeable bags

‘ P^{'}

and

‘ Q^{'}

containing

2 %

sucrose are placed in two beakers containing water and

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sucrose respectively. Which one of the following outcomes is true?

Q.
Read the following passage and answer the following questions.
Dialysis tubing is a semipermeable membrane. It allows small molecules, such as water, to pass through easily, while larger molecules, such as sucrose, are restricted. Movement of molecules across the tubing is due to concentration gradients. In an experiment designed to study osmosis, several pieces of dialysis tubing were filled with sucrose solutions of varying concentration and placed in beakers containing distilled water. The rate and direction of water movement was determined by weighing the bags before and after placing them in the distilled water. The data are recorded below.Table 1

Tube number	Tube contents (beaker contents)	Mass(g) 0 minutes	Mass (g) 15 minutes	Mass (g) 30 minutes	Mass (g) 45 minutes	Mass (g) 60 minutes
1	Distilled water (distilled water)	22.3 g	22.4 g	22.2 g	22.3 g	22.3 g
2	10% sucrose (distilled water)	24.8 g	25.3 g	25.7 g	26.4 g	26.9 g
3	40% sucrose (distilled water)	25.1 g	26.3 g	27.5 g	28.9 g	29.6 g
4	Distilled water (40% sucrose)	22.7 g	21.3 g	20.5 g	19.8 g	18.7 g

Cell membranes are also semipermeable, allowing water but not other substances to cross easily. A red blood cell placed in a 0.9% NaCl solution will neither swell nor shrivel. Based on this knowledge, and the information presented in Table 1, what would happen to a red blood cell placed in a 20% NaCl solution?

Q. Read the following passage and answer the following questions.
Dialysis tubing is a semipermeable membrane. It allows small molecules, such as water, to pass through easily, while larger molecules, such as sucrose, are restricted. Movement of molecules across the tubing is due to concentration gradients. In an experiment designed to study osmosis, several pieces of dialysis tubing were filled with sucrose solutions of varying concentration and placed in beakers containing distilled water. The rate and direction of water movement was determined by weighing the bags before and after placing them in the distilled water. The data are recorded below.
Table 1

Tube number	Tube contents (beaker contents)	Mass(g) 0 minutes	Mass(g) 15 minutes	Mass (g) 30 minutes	Mass(g) 45 minutes	Mass (g) 60 minutes
1	Distilled water (distilled water)	22.3 g	22.4 g	22.2 g	22.3 g	22.3 g
2	10% sucrose (distilled water)	24.8 g	25.3 g	25.7 g	26.4 g	26.9 g
3	40% sucrose (distilled water)	25.1 g	26.3 g	27.5 g	28.9 g	29.6 g
4	Distilled water (40% sucrose)	22.7 g	21.3 g	20.5 g	19.8 g	18.7 g

Why does the mass of Tube 3 increase while the mass of Tube 4 decreases?

Q. Potato slices were placed in sucrose solution. After half an hour, density of sucrose solution increased. Water potential of Potato tuber is

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