Key term for OCR GCSE Biology A, used in Practical activities.
The difference in the concentration of a substance between two regions which determines the direction of net movement.
concentration gradient appears in OCR GCSE Biology A revision content for Practical skills, especially Practical activities and Transport in and out of cells.
Practical skills
Practical activities • Transport in and out of cells
Scaling up
Supplying the cell • Transport in cells
Scaling up
The challenges of size • Factors affecting water uptake
Scaling up
The challenges of size • Water and mineral uptake
Scaling up
The challenges of size • Potometer
Scaling up
The challenges of size • Exchange surfaces
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