The photomicrograph shows plant cells in different stages of the mitotic cell cycle. Four of the cells are labelled with a number to identify them. [Figure 20.1] One of the numbered cells is within the main stage of mitosis in which the spindle begins to form. A second numbered cell is within the main stage of mitosis in which the spindle fibres shorten. Which row correctly identifies the two cells that are in these stages of mitosis?
✓ Correct Answer
The correct answer is D: stage in which spindle begins to form: 4, stage in which spindle fibres shorten: 2
📋 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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