The table shows the masses of two potato cylinders before and after an osmosis investigation.
Table
| Cylinder | Initial mass / g | Final mass / g |
|---|---|---|
| P | 2.0 | 2.3 |
| Q | 5.0 | 5.5 |
Which statement correctly compares the percentage gains in mass?
Q has the greater gain: P gains 10%10\%10% and Q gains 15%15\%15%
P has the greater gain: P gains 15%15\%15% and Q gains 10%10\%10%
Q has the greater gain: P gains 13%13\%13% and Q gains 20%20\%20%
P has the greater gain: P gains 20%20\%20% and Q gains 13%13\%13%
41 exam-style questions on Edexcel GCSE Biology 1.4 Transport across cell membranes, covering 1.4.1 Transport into and out of cells and 1.4.2 Percentage gain and loss in osmosis. Each one has a worked solution and a mark scheme showing where the marks go.