A-LevelBiologyCell membranes and transportMay/June 2023Paper 1 Q181 Mark
A student measured the time taken for complete diffusion of a dye into agar blocks of different sizes which were suspended in the dye. The results are shown. [Figure 18.1] What is the predicted time for complete diffusion of the dye into the agar block measuring 5 mm x 10 mm x 15 mm?
A6.2 s
B16.1 s
C34.5 s
Dmore than 34.5 s
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The correct answer is A. 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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