A-LevelBiologyBiodiversity and conservation9700/12 · May/June 2011 · Q401 Mark

What is the function of nitrifying bacteria in the soil?

Aoxidation of ammonium compounds to nitrates

Boxidation of nitrogen gas to nitrates

Creduction of ammonium compounds to nitrates

Dreduction of nitrates to nitrites

✓ Correct answer

A: oxidation of ammonium compounds to nitrates

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Topic: Biodiversity and conservation, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2011 Paper 1 Variant 2, question 40.

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