May/June 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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23Mitosis Cell CycleHard1 mark
Some plant cells in different stages of the mitotic cell cycle are labelled.
Figure 23, a drawing of a block of plant epidermal cells, each with a visible nucleus, with five nuclei picked out by leader lines: 1 has fine, pale, thread-like chromatin with a small dark nucleolus; 2 has darkly condensed chromosomes aligned in a single row across the middle of the cell, with spindle fibres converging symmetrically from both sides; 3 has darkly condensed, tangled chromosomes clustered together with no clear polar arrangement; 4 has darkly condensed chromosomes separated into two groups spread toward opposite ends of the cell, with spindle fibres visible across its full width; 5 has darkly condensed chromosomes gathered in a dense mass to one side of the cell, with spindle fibres fanning out from that side.
What is the correct order of one mitotic cell cycle?