A-LevelBiologyCell membranes and transportMay/June 2024Paper 1 Q161 Mark
The electron micrograph shows some human blood cells. [Electron micrograph of human blood cells with one cell labelled X] Which row correctly shows the net movement of water by osmosis and the water potential of the cytoplasm of cell X compared with the solution surrounding the cells? [Table with columns 'net movement of water by osmosis', 'water potential of cytoplasm of cell X compared with the solution']
Ainto the cell higher
Binto the cell lower
Cout of the cell higher
Dout of the cell lower
✓ Correct Answer
The correct answer is C: out of the cell higher
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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