A-LevelBiologyCell membranes and transportMay/June 2011Paper 1 Q31 Mark
Visking tubing is an artificial partially permeable membrane used to demonstrate diffusion. Glucose molecules can pass through the pores in the membrane which are approximately 2.4 nm in diameter. Which of the following could pass through the pores? 1 bacteria 2 haemoglobin 3 ribosomes 4 glycogen
A2 only
B1 and 3 only
C2 and 4 only
Dnone of these
✓ 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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