2. Organisation
Key learning objectives
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gcse · biology · Pearson Edexcel · All papers
Releases 1 August 2026
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Examiner-style long-answer practice with automatic marking, improvement advice and ProofCoach tracking.
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Onion cell microscopy practical
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Cell drawing measurements
| image size (mm) | actual size (mm) |
|---|---|
| 42 | 0.06 |
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Potato cylinder osmosis results
| sucrose concentration (mol dm-3) | mean mass change (%) | range (%) |
|---|---|---|
| 0 | 12 | 3 |
| 0.4 | -2 | 2 |
| 0.8 | -18 | 5 |
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Repeat mass changes near the isotonic point
| sucrose concentration (mol dm-3) | repeat 1 (%) | repeat 2 (%) | repeat 3 (%) |
|---|---|---|---|
| 0.3 | 5 | 4 | 6 |
| 0.4 | -1 | -2 | 0 |
| 0.5 | -7 | -6 | -8 |
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