A-LevelBiologyThe mitotic cell cycleMay/June 2017Paper 1 Q161 Mark
The photomicrograph shows a stage of mitosis. [Photomicrograph of a cell in metaphase] What would be correct for the next stage in mitosis? [Table with columns 'paired chromatids', 'nuclear membrane' and rows A, B, C, D]
Apaired chromatids absent, nuclear membrane absent
Bpaired chromatids absent, nuclear membrane re-forming
Cpaired chromatids present, nuclear membrane absent
Dpaired chromatids present, nuclear membrane breaking down
✓ Correct Answer
The correct answer is A: paired chromatids absent, nuclear membrane absent
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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