A-LevelBiologyCell membranes and transportOct/Nov 2009Paper 1 Q271 Mark
The diagram shows the changes in pressure potential (Ψp), solute potential (Ψs) and water potential (Ψ) when a plasmolysed plant cell is placed in pure water. [Graph showing changes in Ψ, Ψp, Ψs over time] Which shows the correct curves for each potential?
AX: Ψ, Y: Ψp, Z: Ψs
BX: Ψp, Y: Ψs, Z: Ψ
CX: Ψs, Y: Ψ, Z: Ψp
DX: Ψp, Y: Ψ, Z: Ψs
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of cell membranes and transport 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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