O-LevelBiologyEcology & Environment5090/12 · May/June 2016 · Q301 Mark

The diagram shows some structures, Q, on the roots of a bean plant. [Figure of plant roots with structures Q] Which chemical change fixes nitrogen in these structures?

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Aammonium salts to nitrates

Bnitrogen to ammonium salts

Cproteins to amino acids

Dproteins to amino acids

✓ Correct answer

B: nitrogen to ammonium salts

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2016 Paper 1 Variant 2, question 30.

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