5.2. Chromosome behaviour in mitosis
A subsection of Biology, 9700, through 5. The mitotic cell cycle
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shows a plant cell in a stage of mitosis. Some of the structures shown in contain DNA. Use a line labelled D on to indicate one of these structures. Name the stage of mitosis shown in . Colchicine is a chemical used by scientists to study mitosis. This chemical inhibits the organisation of the microtubules in prophase of mitosis. The cell shown in had not been treated with colchicine. Explain the evidence in that shows the cell had not been treated with colchicine.
9700_w24_qp_21
THEORY
2024
Paper 2, Variant 1
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