DP Biology (last assessment 2024)

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Question 19M.3.HL.TZ2.20a

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.3.HL.TZ2.20a
Level HL Paper 3 Time zone TZ2
Command term State Question number a Adapted from N/A
a.
[Maximum mark: 1]
19M.3.HL.TZ2.20a

Most stomach ulcers are caused by a bacterium that lives under the mucus lining of the stomach wall.

(a)

State the name of the bacterium that can cause stomach ulcers.

[1]

Markscheme

Helicobacter pylori ✔

To award [1] full scientific name is required.

Examiners report

A large number stated the complete binomial name, as expected; many provided only a partial name; a noticeable number wrote E. coli, something else irrelevant or left the box blank.

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