Quiz on Diffusion and Osmosis

Which factor increases the rate of diffusion by speeding up molecular motion?

• Concentration gradient

• Temperature

• Surface area

• Medium

What is the role of a selectively permeable membrane in osmosis?

• It allows all molecules to pass through freely.

• It blocks water molecules and allows solutes to pass freely.

• It allows water molecules to pass through but blocks larger solute particles.

• It requires energy to transport molecules across the membrane.

Which of the following is an example of diffusion?

• Absorption of water by plant roots.

• Water moving out of cells in a salty solution.

• Oxygen entering blood from the lungs.

• Water moving into red blood cells in pure water.

What type of osmotic solution causes water to move into the cell, making it swell?

• Hypertonic solution

• Isotonic solution

• Hypotonic solution

• Concentrated solution

Which of the following factors does NOT affect the rate of diffusion?

• Concentration gradient

• Temperature

• Particle size

• Color of the particles

What is the main difference between osmosis and diffusion?

• Osmosis involves the movement of solutes, while diffusion involves water molecules.

• Osmosis requires energy, while diffusion does not.

• Osmosis involves water molecules moving through a selectively permeable membrane, while diffusion involves particles moving freely.

• Osmosis occurs in gases, while diffusion occurs in liquids.

Which of the following is an example of osmosis?

• Spreading of perfume scent in a room.

• Movement of water into red blood cells in pure water.

• Movement of glucose into cells.

• Oxygen entering blood from the lungs.

What happens to a cell placed in a hypertonic solution?

• The cell swells.

• The cell shrinks.

• The cell remains the same size.

• The cell bursts.

Which factor makes diffusion faster in gases than in liquids?

• Concentration gradient

• Temperature

• Medium

• Surface area

Which of the following is NOT a factor affecting the rate of diffusion?

• Surface area

• Temperature

• Particle size

• Color of the particles