Why cells need efficient exchange
Why cells need efficient exchange
Cells need oxygen, glucose, water and mineral ions, and they must remove wastes such as carbon dioxide. The cell membrane controls what enters and leaves, so exchange happens across the cell surface.
Step-by-step lessons covering OCR GCSE Biology Supplying the cell for Foundation and Higher tier. Each lesson works through exam-style questions in the written papers format. Start with the foundational topics and build up to the higher-tier material.
