CAIE IGCSE Biology 3.1.3 Diffusion Across Cell Membranes
Practise identifying substances that enter or leave cells by diffusion through the cell membrane in biological contexts.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- identify oxygen and carbon dioxide movement into and out of mesophyll cells as diffusion
- decide which dissolved substances pass through a membrane in a diffusion experiment
- explain carbon dioxide entry into leaves as diffusion from higher to lower concentration through stomata
3.1.3—Diffusion through cell membranes question 1
[Maximum number: 1]
How do carbon dioxide and oxygen move into and out of a mesophyll cell?
A
active transport
B
diffusion
C
respiration
D
transpiration
B
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