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Tonicity and Osmosis

Total questions: 15

Worksheet time: 45mins

Name
Class
Date
1.

What will happen to a cell in a hypotonic solution?

a)

The cell will swell up.

b)

The cell will shrink.

c)

The cell will remain the same size.

d)

The cell will burst immediately.

2.

What is a hypertonic solution?

a)

A solution with a lower concentration of solutes compared to the inside of the cell.

b)

A solution that has the same concentration of solutes as the inside of the cell.

c)

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to leave the cell.

d)

A solution that causes cells to swell due to water influx.

3.

How does osmosis affect plant cells?

a)

Osmosis helps maintain turgor pressure in plant cells, which is essential for structural support.

b)

Osmosis causes plant cells to lose water and become limp.

c)

Osmosis has no effect on plant cells.

d)

Osmosis increases the temperature of plant cells.

4.

What happens to a cell in a hypertonic solution?

a)

The cell will shrink.

b)

The cell will swell.

c)

The cell will remain the same size.

d)

The cell will burst.

5.

What is another word that can be used to describe 'homeostasis'?

a)

BALANCE

b)

STABLE

c)

VARIABLE

d)

DYNAMIC

6.

What is turgor pressure?

a)

The pressure exerted by water inside the central vacuole of a plant cell, helping maintain its shape.

b)

The force that drives photosynthesis in plant cells.

c)

The pressure exerted by the cell wall on the cytoplasm of a plant cell.

d)

The amount of water absorbed by the roots of a plant.

7.

What is the significance of feedback regulation in homeostasis?

a)

It helps maintain stability in the internal environment by adjusting physiological processes in response to changes.

b)

It disrupts the internal environment by causing constant fluctuations.

c)

It has no impact on the internal environment and is merely a theoretical concept.

d)

It only applies to external environmental changes and not internal processes.

8.

Define osmosis.

a)

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

b)

Osmosis is the process of diffusion of solutes across a membrane.

c)

Osmosis is the movement of solutes from an area of higher concentration to an area of lower concentration.

d)

Osmosis is the absorption of nutrients by plant roots from the soil.

9.

Give an example of a substance that moves via passive transport.

a)

Oxygen

b)

Glucose

c)

Sodium ions

d)

Potassium ions

10.

What is an isotonic solution?

a)

A solution with a higher concentration of solutes than the inside of the cell, causing water to move into the cell.

b)

A solution with a lower concentration of solutes than the inside of the cell, causing water to move out of the cell.

c)

An isotonic solution has the same concentration of solutes as the inside of the cell, resulting in no net movement of water.

d)

A solution that contains no solutes at all, resulting in a vacuum effect.

11.

What is the difference between active and passive transport?

a)

Passive transport requires energy to move substances from low to high concentration, while active transport does not.

b)

Active transport moves substances from high to low concentration without using energy, while passive transport requires energy.

c)

Passive transport is the movement of substances from high to low concentration without using energy, while active transport moves substances from low to high concentration using energy.

d)

Active transport and passive transport are the same processes that do not require energy.

12.

What type of solution allows water to enter the plant cell?

a)

Isotonic solution

b)

Hypertonic solution

c)

Hypotonic solution

d)

Saturated solution

13.

What is the process of active transport?

a)

Active transport requires energy to move substances against their concentration gradient, from low to high concentration.

b)

Active transport occurs without the use of energy, moving substances from high to low concentration.

c)

Active transport is a passive process that does not require energy.

d)

Active transport only occurs in plant cells and not in animal cells.

14.

What is homeostasis?

a)

Homeostasis is the process of maintaining a stable internal environment in an organism.

b)

Homeostasis refers to the ability of an organism to adapt to external changes.

c)

Homeostasis is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation.

d)

Homeostasis is the mechanism by which organisms reproduce and grow.

15.

What is the role of the cell membrane in osmosis?

a)

The cell membrane is impermeable to all substances.

b)

The cell membrane allows all solutes to pass freely.

c)

The cell membrane is selectively permeable, allowing water to pass through while restricting the movement of solutes.

d)

The cell membrane prevents water from entering the cell.