O-LevelBiologyEcology & Environment5090/12 · Oct/Nov 2021 · Q301 Mark

The diagram shows part of the nitrogen cycle. [Figure 30.1] What are processes P, Q, R and S?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Anitrification, nitrification, decomposition, nitrogen fixation

Bnitrification, nitrogen fixation, nitrification, decomposition

Cnitrogen fixation, nitrification, decomposition, nitrogen fixation

Dnitrogen fixation, nitrogen fixation, nitrification, decomposition

✓ Correct answer

D: nitrogen fixation, nitrogen fixation, nitrification, decomposition

Oracle Prep sorts past-paper questions by topic, so you can drill Ecology & Environment and see which topics are most likely to come up next.

Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2021 Paper 1 Variant 2, question 30.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content