A-LevelBiologyCell membranes and transportOct/Nov 2013Paper 1 Q51 Mark
Many single-celled animals, living in fresh water, possess vacuoles which contract regularly, expelling excess water. Why do the cells of plants living in fresh water not require such vacuoles?
APlant cells have a higher concentration of dissolved solutes than animal cells.
BPlant cell walls are impermeable to water.
CPlant cell walls limit cell size.
DWater movement into plants is controlled by their roots.
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of cell membranes and transport within the Biologysyllabus. The examiner's mark scheme requires...
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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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