A-LevelBiologyBiodiversity and conservation9700/12 · Oct/Nov 2010 · Q391 Mark

The diagram represents part of the nitrogen cycle. [Figure 39.1 showing a nitrogen cycle diagram with processes A, B, C, D labeled] Which process is carried out by nitrifying bacteria?

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.

Aconversion of nitrogen in atmosphere to ammonia

Bconversion of ammonia to nitrogen compounds in plants

Cconversion of nitrogen compounds in soil to ammonia

Dconversion of ammonia to nitrogen in atmosphere

✓ Correct answer

C: conversion of nitrogen compounds in soil to ammonia

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

Topic: Biodiversity and conservation, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2010 Paper 1 Variant 2, question 39.

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