A-LevelBiologyCell membranes and transportOct/Nov 2020Paper 1 Q151 Mark
Equal-sized potato pieces were placed into test-tubes containing equal volumes of different concentrations of sucrose solution and left for 30 minutes. All other variables were controlled. After 30 minutes, the potato piece in one of the concentrations of sucrose solution had not changed in size. What can be concluded from the result for this potato piece? 1 The concentration of sucrose in the potato is the same as the concentration of the sucrose solution. 2 The water potential of the potato is the same as the water potential of the sucrose solution. 3 There is no more movement of water into or out of the potato.
A1, 2 and 3
B1 and 2 only
C1 and 3 only
D2 and 3 only
✓ 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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