iGCSE Biology 2d: Movement of particles

Which process moves molecules against the concentration gradient?

• Diffusion

• Osmosis
• Active transport

In which process does the cell use energy from respiration?

• Active transport

• Osmosis

• Diffusion

Osmosis occurs from a solution with __________ water concentration to a solution with __________ water concentration.

• Higher, lower

• Lower, higher

• Equal, equal

• Depends on the concentration of solute

Water will always move in the direction of...?

• Lowest solute concentration

• Highest solute concentration

Which of these cells would become turgid?

• An animal cell in salt water

• A plant cell in distilled water

• An animal cell in distilled water

• A plant cell in salt water

What is the source of energy for active transport?

• ATP

• Concentration gradient

• Water potential

• Kinetic energy

A plant cell is plasmolysed when...

• It is placed in distilled water

• The cell bursts

• The cell membrane and cell wall separate

• There is no water concentration gradient

An animal cell placed in distilled water would...

• Shrivel up

• Stay the same

• Become turgid

• Burst

Which of the following would speed up diffusion?

• Decreasing thermal energy

• Increasing thermal energy

• Increasing concentration gradient

• Decresing concentration gradient

Which cellular involves the movement of molecules from low to high concentration?

• Diffusion

• Active transport

• Osmosis