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Question 22N.1.SL.TZ0.4

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.1.SL.TZ0.4
Level SL Paper 1 Time zone TZ0
Command term Question number 4 Adapted from N/A
4.
[Maximum mark: 1]
22N.1.SL.TZ0.4

The micrograph shows some onion (Allium cepa) cells undergoing mitosis.

[Source: Reischig, J., 2014. [Onion cells]. [image online] Available at: https://commons.wikimedia.org/wiki/File:Mitosis_(261_14)_Pressed;_root_
meristem_of_onion_(cells_in_prophase,_anaphase).jpg [Accessed 27 October 2021].]

What is the mitotic index, taking into account all visible nuclei?

A.  0.1

B.  0.2

C.  0.4

D.  0.6

[1]

Markscheme

B

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