DP Biology (first assessment 2025)

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Question 21M.2.SL.TZ1.e

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.2.SL.TZ1.e
Level SL Paper 2 Time zone TZ1
Command term Identify Question number e Adapted from N/A
e.
[Maximum mark: 1]
21M.2.SL.TZ1.e

With reference to the diagram, identify one example of catabolism.

[1]

Markscheme

a. (letter X) breakdown of monosaccharides/respiration ✔

b. (letter Y) hydrolysis/photolysis in photosynthesis/oxidation of water ✔

Answer must come from the diagram.

Examiners report

The diagram was generally confusing to candidates.

Too often candidates did not make reference to the diagram when giving an example of catabolism. Some thought that ADP changing to ATP was catabolism. This probably comes from a failure to understand paired reactions.

Syllabus sections