A-LevelBiologyThe mitotic cell cycleOct/Nov 2022Paper 1 Q211 Mark
Stained onion cells undergoing mitosis were observed using a microscope. Which row is correct for mitosis in plant cells?
Aprophase: centrioles visible, metaphase: chromosomes pair up at the equator, anaphase: two telomeres are visible on each chromatid, telophase: two nuclear membranes form
Bprophase: centromeres present, metaphase: chromosomes align at the equator, anaphase: chromosomes replicate to form chromatids, telophase: centrioles disappear
Cprophase: each chromosome is visible as two chromatids, metaphase: centromeres attach to spindle fibres, anaphase: chromatids separate and migrate to opposite poles, telophase: chromosomes decondense
Dprophase: spindle fibres formed by centrioles, metaphase: centromeres attach to spindle fibres, anaphase: chromatids are pulled apart by centrioles, telophase: spindle fibres form new nuclear membranes
✓ Correct Answer
The correct answer is C. 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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