A-LevelBiologyThe mitotic cell cycleOct/Nov 2016Paper 1 Q201 Mark
Which row correctly shows the behaviour of the nuclear envelope, the centrioles and the spindle during a stage of mitosis?
Astage of mitosis: prophase, nuclear envelope: disappears, centrioles: replicate, spindle: spindle microtubules begin to form
Bstage of mitosis: metaphase, nuclear envelope: not present, centrioles: begin to move to poles of cell, spindle: spindle microtubules fully formed
Cstage of mitosis: anaphase, nuclear envelope: begins to reform, centrioles: at opposite poles of the cell, spindle: some spindle microtubules shorten
Dstage of mitosis: telophase, nuclear envelope: reforms, centrioles: one beside each nucleus, spindle: spindle microtubules break down
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of the mitotic cell cycle within the Biologysyllabus. The examiner's mark scheme requires...
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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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