Chapter 3 quiz 1

Which process happens against a concentration gradient?

• Diffusion

• Osmosis

• Active transport

Which process is called as the diffusion of water through a partially permeable membrane?

• Diffusion

• Osmosis

• Active transport

Which process needs energy?

• Diffusion

• Osmosis

• Active transport

In which direction will diffusion take place?

• B to A

• A to B

In which direction will active transport take place?

• B to A

• A to B

In which direction will osmosis take place?

• B to A

• A to B

Which side is highly concentrated?

• A

• B

Answer explanation

The side which contains less water molecules is highly concentrated.

Therefore the answer is A.

Which side has a higher water potential?

• A

• B

Answer explanation

The side which contains more water molecules is having a high water potential.

Therefore the answer is B.

• A

• B

• C

• D

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

Answer explanation

Gases can diffuse in any direction.

osmosis takes place only in water.