KS4 B1.16 Osmosis - theory

What is osmosis?

• The movement of sugar molecules through a membrane

• The movement of water from a concentrated to a dilute solution

• The movement of water across a partially permeable membrane from a dilute to a more concentrated solution

What type of membrane does osmosis occur through?

• Impermeable membrane

• Partially permeable membrane

• Fully permeable membrane

How is osmosis different from diffusion?

• Osmosis involves water molecules only

• Osmosis only happens in plant cells

• Osmosis requires energy input

A dilute solution contains:

• A low concentration of water and a high concentration of solute

• A high concentration of water and a low concentration of solute

• Equal concentrations of water and solute

What happens when the solution outside a cell is hypotonic to the cell?

• Water moves into the cell

• Water moves out of the cell

• There is no net movement of water

Which term describes a solution that has the same solute concentration as the cell?

• Hypotonic

• Isotonic

• Hypertonic

If a cell is placed in a hypertonic solution, what happens to it?

• It gains water and swells

• It remains the same

• It loses water and may shrink

Why is osmosis important in animals?

• It allows the absorption of nutrients through the stomach

• It helps maintain internal conditions by controlling water movement

• It produces energy for the cell

Which situation would cause an animal cell to burst?

• Being placed in a hypertonic solution

• Being placed in an isotonic solution

• Being placed in a very hypotonic solution

In plant cells, what happens when water enters by osmosis and builds pressure?

• The cell becomes plasmolysed

• The cell becomes turgid

• The cell dies