| Date | November 2011 | Marks available | 1 | Reference code | 11N.3.SL.TZ0.16 |
| Level | Standard level | Paper | Paper 3 | Time zone | TZ0 |
| Command term | Label | Question number | 16 | Adapted from | N/A |
Question
The diagram below shows the nitrogen cycle.
Using the letter X, label where the process of denitrification occurs in the nitrogen cycle.
Markscheme
letter X labelled anywhere on the arrow between Nitrate (NO3) and Nitrogen (N2)
Examiners report
Many candidates were correctly able to indicate that denitrification was indicated by the arrow between nitrate and nitrogen on the diagram.
Syllabus sections
Option C: Ecology and conservation » Option C: Ecology and conservation (Additional higher level topics) » C.6 Nitrogen and phosphorus cycles
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