DP Biology (first assessment 2025)

Question 19N.1A.HL.TZ0.5

Date	November 2019	Marks available	[Maximum mark: 1]	Reference code	19N.1A.HL.TZ0.5
Level	HL	Paper	1A	Time zone	TZ0
Command term	Calculate	Question number	5	Adapted from	N/A

[Maximum mark: 1]

19N.1A.HL.TZ0.5

Students examined micrographs and counted cells in the different stages of mitosis as well as those cells with no visible chromosomes. The table shows their results.

What is the mitotic index?

A. 0.2

B. 0.4

C. 0.6

D. 0.7

[1]

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D. Continuity and Change » D2.1 Cell and nuclear division » D2.1.17. Differences between tumours in rates of cell division and growth and in the capacity for metastasis and invasion of neighbouring tissue

Question 19N.1A.HL.TZ0.5

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