A-LevelBiologyTransport in plantsOct/Nov 2024Paper 1 Q271 Mark
The diagram shows a phloem sieve tube element and a companion cell that are involved in translocation of sucrose. Which process correctly describes the translocation of sucrose through these cells?
ASucrose moves from Y to Z by active transport.
BProtons move from Y to Z by active transport.
CProtons move from Z to Y by diffusion.
DProtons move from X to W by diffusion.
✓ Correct Answer
The correct answer is B. 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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