logo

Cambridge IGCSE Biology practice

Paper 3 structured question: Diffusion

Try the question first, then check the answer and practise the same topic again.

Attempt questionDiffusion revisionRevise the key idea

At a glance

3

Paper

2

Marks

Topic

Diffusion

Exam-style question

Try this first

Paper 3Theory (Core)2 marks

Diffusion is a key process in the exchange of gases and solutes in living organisms.

Description

Diffusion in Cells

Oxygen and carbon dioxide move in and out of cells by diffusion to support respiration and photosynthesis.

  1. a

    Describe how diffusion allows oxygen to enter cells.

    Aim for approximately 2 distinct marking points.

    [2]

0 of 1 part answered

Answer every part before opening the mark scheme.

Common mistake

No common mistake is linked to this question yet.

Related flashcards

Flashcard 1 of 6

Press Space to flip, arrows to move

Related practice questions

Question 1 of 5

Choose an answer, get feedback, then move sideways through the set.

0 of 4 attempted

Paper 3 structured question: Diffusion

Paper 3Theory (Core)3 marks

Description

Waste Removal by Diffusion

Waste substances like carbon dioxide diffuse out of cells into the surrounding fluid to be eliminated.

  1. a

    Describe the significance of diffusion in removing carbon dioxide from cells.

    Aim for approximately 3 distinct marking points.

    [3]