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Question 19M.3.HL.TZ1.a

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.3.HL.TZ1.a
Level HL Paper 3 Time zone TZ1
Command term Outline Question number a Adapted from N/A
a.
[Maximum mark: 2]
19M.3.HL.TZ1.a

The diagram shows the bacterium Helicobacter pylori attacking the gastric mucosa of the stomach.

[Source: Reproduced from Gut, B A Hills, 34, 588–593, 1993 with permission from BMJ Publishing Group Ltd.]

 

Outline the possible consequences of a Helicobacter pylori infection of the stomach wall.

[2]

Markscheme

a. causes inflammation ✔

b. digestion of stomach lining by pepsin and HCl/gastric juice ✔ 

c. called «gastric» ulcer ✔

Examiners report

Student answers revealed much confusion regarding how the bacteria affects the stomach, and again the quality of the responses was affected by lack of precision. Few could explain what caused the digestion of the stomach lining, and the most common marking point achieved was for simply stating that the bacterium causes ulcers.

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