Comprehensive, concise notes designed to help students thoroughly revise the ‘Cell Membranes and transport’ unit for CIE AS Biology (9700). Aligned with the updated Cambridge syllabus (2025-27), editable version included so also easily adaptable for other syllabi or levels. PDF version ready to print also included.
The unit is organised into clear sections:
- Structure of membranes.
- Roles of molecules in the membranes.
- Cell signalling.
- Movement of substances across the membranes: diffusion, facilitated diffusion, active transport, endocytosis and exocytosis.
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