Combined Science — Biology

Diffusion, Osmosis & Active Transport (Cambridge International IGCSE Science): Exam Questions

3 questions · 3 marks · ≈ 3 min

Guided practice

11 markmedium

The diagram shows an uncooked potato being used in an experiment. The skin of the potato was removed as shown.

Diagram of a skinned potato cylinder in water, hollowed at the top and filled with concentrated sugar solution, labelled to illustrate osmosis.

The experiment was left for a few hours.

Which diagram shows the result?

Four side‑view diagrams of a U‑shaped container in water, labelled A–D, showing different levels of sand gradually filling the central cavity.

Choose your answer

21 markeasy

Which factor would decrease the rate of diffusion from a plant cell?

Choose your answer

high temperature

large surface area

small concentration gradient

small diffusion distance

31 markmedium

The diagram shows a root hair cell.

Line diagram of a plant root hair cell extending into soil, with labelled arrows pointing to its thin wall, large vacuole and surrounding mineral ions

Which type of transport is shown by the arrows in this diagram?

Choose your answer

active transport

diffusion

osmosis

xylem transport