IGCSE 0654_B2.2_Movement in and out of cells_Part 1

Which diagram shows the appearance of a plant cell several minutes after it has been placed in a concentrated solution of sugar?

• A

• B

• C

• D

The arrows in the diagram show the movement of oxygen and carbon dioxide between body cells and the blood in capillaries.

By which process does this movement occur?

• diffusion

• excretion

• osmosis

• respiration

The diagram shows the apparatus used in an experiment on osmosis.

In which tubes will osmosis take place?

• 1 and 2

• 1 and 4

• 2 and 3

• 3 and 4

What is an example of osmosis?

• Carbon dioxide goes out through the stomata of a leaf.

• Digested food is absorbed from the small intestine.

• Oxygen goes into the blood from an alveolus.

• Water enters a plant root from the soil.

The diagram shows an experiment on diffusion.

More sugar diffuses out of the bag than diffuses in.

What is the concentration of sugar in solution X?

• 10%

• 20%

• 30%

• 40%

The diagram shows an experiment to demonstrate the movement of molecules.

After one hour, the water in the beaker turned red.

What is the most likely reason for this colour change?

• Molecules of red ink move through the membrane by diffusion

• Molecules of red ink move through the membrane by osmosis.

• Molecules of water move through the membrane by diffusion.

• Molecules of water move through the membrane by osmosis

Why does oxygen diffuse into the blood from an alveolus in the lungs?

• The oxygen concentration in the alveolus is greater than the carbon dioxide concentration in the blood.

• The oxygen concentration in the alveolus is greater than in the blood.

• The oxygen concentration in the blood is greater than in the alveolus.

• The oxygen concentration in the blood is greater than the carbon dioxide concentration in the alveolus.

The diagram shows water and sugar molecules on either side of a partially permeable membrane.

What happens during osmosis?

• More sugar molecules pass through the membrane from X to Y than from Y to X.

• More sugar molecules pass through the membrane from Y to X than from X to Y.

• More water molecules pass through the membrane from X to Y than from Y to X.

• More water molecules pass through the membrane from Y to X than from X to Y.

A jar of air was placed upside down on top of a jar containing a brown gas as shown.

Which process has taken place?

• diffusion both upwards and downwards

• diffusion downwards only

• diffusion upwards only

• diffusion and osmosis

Which diagram shows the changes in appearance of a plant cell when it remains in a concentrated sugar solution for thirty minutes?

• A

• B

• C

• D