A-LevelBiologyTransport in plantsMay/June 2023Paper 1 Q311 Mark
Which statement supports the theory of active loading of sucrose into companion cells?
AThe pH decreases in the cell wall of the companion cells compared with the cytoplasm.
BThe pH decreases in the cytoplasm of the companion cells compared with the cell wall.
CThe pH decreases in the companion cells and sieve tube elements.
DThe pH decreases in the sieve tube elements compared with the companion cells.
✓ Correct Answer
The correct answer is A. 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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