4.1.3.1 AQA Diffusion Quiz

What is diffusion?

• Movement of particles from lower to higher concentration

• Movement of particles from higher to lower concentration

• Movement of particles without any concentration gradient

• Movement of particles only in liquids

Which substances are transported in and out of cells by diffusion during gas exchange?

• Nitrogen and hydrogen

• Oxygen and carbon dioxide

• Helium and neon

• Methane and ethane

What is one factor that affects the rate of diffusion?

• Color of the substance

• Shape of the container

• Concentration gradient

• Type of organism

How does temperature affect the rate of diffusion?

• Higher temperature decreases the rate

• Higher temperature increases the rate

• Temperature has no effect

• Lower temperature increases the rate

What is the significance of a large surface area to volume ratio in single-celled organisms?

• It decreases the rate of diffusion

• It allows sufficient transport of molecules

• It prevents diffusion

• It increases the organism's size

What is the role of the surface area of the membrane in diffusion?

• It has no role

• Larger surface area increases the rate

• Smaller surface area increases the rate

• It only affects gas diffusion

What is the waste product transported out of cells into the blood plasma for excretion in the kidney?

• Oxygen

• Carbon dioxide

• Urea

• Glucose

What is the primary function of diffusion in cells?

• To create energy

• To transport substances in and out of cells

• To produce proteins

• To divide cells

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

• Concentration gradient

• Temperature

• Surface area

• Color of the substance

What happens to the rate of diffusion if the concentration gradient increases?

• It decreases

• It increases

• It remains the same

• It stops completely