O-LevelBiologyEcology & Environment5090/11 · Oct/Nov 2021 · Q301 Mark

The diagram shows the nitrogen cycle. [Figure 30] Which stages involve bacteria?

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A1, 2, 5 and 6

B2, 5, 6 and 7

C3, 5, 6 and 7

D3, 4, 5 and 6

✓ Correct answer

B: 2, 5, 6 and 7

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2021 Paper 1 Variant 1, question 30.

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