Osmosis- Simple Quiz

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1. A 5% urea solution is hypotonic to a 10% urea solution.

True

False

About This Quiz

Why does the concentration of a solute cause the movement of water through osmosis?

Water is unusual in that it can cross a non-polar membrane but also react and form solutions with ions and polar molecules that cannot cross the same membrane. When water molecules react with a solute they... see moreare no longer free to cross the membrane. The more solute, the fewer molecules left that are free to diffuse across the membrane. Therefore a highly concentrated solution (one with lots of solute) has a low effective concentration of water. Therefore water will tend to diffuse across a membrane from areas of low solute concentration to areas of high solute concentration – until the concentration of the solution is equal on both sides. This is only true if the solute cannot cross the membrane. see less

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2. Osmosis can be described as both the diffusion of a liquid from an area of high concentration of that liquid to an area of a low concentration of that liquid, and, as the diffusion of a liquid from a low concentration of solutes to an area of high concentration of solutes.

True

False

3. If a cell is placed in an isotonic medium, there will be no net movement of water.

True

False

When a membrane that is permeable to both a solute and water separates water with a high osmolarity from water with a low osmolarity...

The motion of the molecules of both the solute and water will cease when equilibrium is reached.

None of the above

5. Osmosis is best defined as the movement of

Molecules from an area of high concentration to an area of lower concentration

Molecules from an area of low concentration to an area of higher concentration.

Water molecules across a membrane from an area of low water to an area of higher concentration.

Water molecules across a membrane from an area of high water concentration to an area of lower concentration.

Water molecules inside a container.

6. A red blood cell placed in a hypertonic medium will

Expand.

Burst.

Shrink.

Have no change in shape.

Become a white blood cell.

7. Water is more concentrated in...

The solution on the side of the membrane with the least solute.

The solution on the side of the membrane with the most solute.

The solution on the one side of the membrane that has reached equilibrium.

The solution on either side of the membrane that has reached equilibrium.

The solution on neither side of the membrane due to the constant motion of the molecules.

8. Water molecules will no longer pass through the semipermeable membrane once equilibrium is reached.

True

False

9. Which of the following will pass through a cell membrane most easily?

Small polar molecules

Small nonpolar molecules

Large polar molecules

Large nonpolar molecules

Large neutral molecules

10. When a membrane that is only permeable to water separates water with a high osmolarity from water with a low osmolarity...

The water will diffuse through the membrane until there is an equal volume of solute on both sides.

The water will diffuse through the membrane until there is an equal volume of water on both sides.

The water will diffuse through the membrane until there is an equal concentration of water on both sides.

The water will diffuse through the membrane until there is an equal concentration of solute on both sides.

The water will diffuse through the membrane until there is an equal concentration of solute and water on both sides.

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Current Version
Mar 15, 2022

Quiz Edited by
ProProfs Editorial Team
Apr 23, 2010

Quiz Created by
Lqq889