A-LevelBiologyCell membranes and transportOct/Nov 2019Paper 1 Q191 Mark
Equal sized potato pieces were placed into a test-tube and covered with a sucrose solution. The test tube was left for 30 minutes. All other variables were controlled. After 30 minutes, the potato piece had not changed in size. What can be concluded from this result?
AThe concentration of sucrose is the same in the potato and in the solution and there is no more movement of water into or out of the potato.
BThe concentration of sucrose is the same in the potato and in the solution and there is no net movement of water into the potato.
CThe water potential is the same in the potato and in the sucrose solution and there is no more movement of water into or out of the potato.
DThe water potential is the same in the potato and in the sucrose solution and there is no net movement of water into or out of the potato.
✓ 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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