A-LevelBiologyTransport in plantsOct/Nov 2014Paper 1 Q251 Mark
A leafy shoot was attached to a potometer and exposed to a variety of conditions. The time taken for the meniscus to move 50 mm along the capillary tubing was recorded for each of the conditions. [Figure 25] Which shows the slowest and fastest rates of water uptake?
Aslowest /mms⁻¹: 0.3, fastest /mms⁻¹: 1.3
Bslowest /mms⁻¹: 0.3, fastest /mms⁻¹: 3.3
Cslowest /mms⁻¹: 3.3, fastest /mms⁻¹: 0.3
Dslowest /mms⁻¹: 1.3, fastest /mms⁻¹: 0.8
✓ Correct Answer
The correct answer is A: slowest /mms⁻¹: 0.3, fastest /mms⁻¹: 1.3
📋 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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