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CAIE A-Level Biology AS 5.2.3 Main Stages of Mitosis Questions

Describe the stages of mitosis and how they preserve chromosome number, using evidence from each question and mark scheme.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • Describe the main stages of mitosis and explain how chromosome number is maintained in daughter cells.

CAIE A-Level Biology AS 5.2.3 Main Stages of Mitosis Questions question 1

[Maximum number: 1]

Eukaryotic organisms grow and increase in size as a result of cell division. The diagram shows some stages of mitosis with one stage missing, labelled X .

Figure for Question CAIE A-Level Biology AS 5.2.3 Main Stages of Mitosis Questions question 1 — CAIE A-Level Biology AS

What happens in stage X ?

A

Spindle fibres attach to the centromeres and the chromosomes line up along the equator.

B

The chromatin coils and condenses and the nuclear membrane disintegrates.

C

The chromosomes line up in pairs along the equator of the cell.

D

Microtubules shorten so that spindle fibres contract and the centromeres divide.

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