GCSE Biology Revision — Transport in Cells
Revise Transport in Cells for GCSE Biology with a topic explanation, worked example and common mistakes. Check the board notes for specification differences.
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- Transport in Cells in GCSE Biology: explanation, examples, and practice links on this page.
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- Students revising GCSE Biology for UK exams.
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This page includes a topic explanation and a worked example. Check your course for current practice coverage.
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What is Transport in Cells?
Transport in Cells is the GCSE Biology route that brings diffusion, osmosis, and active transport together. Students lose marks when they treat all three as 'movement across a membrane'. The key difference is energy and direction: diffusion moves particles from high to low concentration, osmosis is the movement of water through a partially permeable membrane, and active transport moves substances against the concentration gradient using energy from respiration.
Board notes: AQA, Edexcel and OCR all test the same core Biology ideas here, but the wording of required practicals and the examples used in questions can vary slightly by specification.
Step-by-step explanationWorked examples
Worked example
Question focus: 'Explain why root hair cells use active transport.' Start with the context: mineral ions are often in lower concentration in the soil than inside the cell. Then explain the mechanism: the cell uses energy from respiration to move the ions into the root hair cell against the concentration gradient. Finish by linking the ions to plant growth if the question asks for purpose.
Practise this topic
Start with low-focus cards for Transport in Cells, then move into full exam-style practice when you want the heavier session.
Targeted practice plan
- 1Define the core process in Transport in Cells, then rewrite it as a sequence with the exact scientific vocabulary examiners reward.
- 2Answer one practical-style question and label the independent variable, dependent variable, controls, and biological reason for the result.
- 3Finish with one retrieval check: can you explain why the process happens, not just what happens?
Common mistakes
- 1Writing that osmosis is the movement of any particles rather than water molecules only.
- 2Forgetting that active transport needs energy because it moves against the concentration gradient.
- 3Using 'high pressure' or 'stronger solution' instead of the correct concentration language.
Transport in Cells exam questions
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Frequently asked questions
What is the difference between diffusion, osmosis and active transport?
Diffusion moves particles from high to low concentration, osmosis moves water through a partially permeable membrane, and active transport moves substances against the concentration gradient using energy.
Why is transport in cells such a common exam topic?
Because it combines definitions, required-practical thinking, and application to plants, humans, and cells in unfamiliar scenarios.