A-LevelBiologyTransport in plantsMay/June 2025Paper 1 Q271 Mark
Which features of companion cells and xylem vessel elements make them suitable for their function?
Acompanion cells: transport contents of cell in one direction only, xylem vessel elements: lignified walls provide support
Bcompanion cells: cellulose walls provide support, xylem vessel elements: nuclei allow cell division
Ccompanion cells: nuclei allow cell division, xylem vessel elements: gaps between cells allow rapid transport
Dcompanion cells: numerous mitochondria supply energy, xylem vessel elements: absence of cytoplasm allows mass flow
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of transport in plants within the Biologysyllabus. The examiner's mark scheme requires...
📋 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...
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