CAIE IGCSE Biology 19.3.2 Nitrogen Cycle with Reference to Questions
Practise tracing nitrogen through fixation, nitrification, plant uptake, feeding, decomposition, deamination and denitrification.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- label nitrogen fixation, nitrification and denitrification on nitrogen-cycle diagrams
- trace protein decomposition and deamination through ammonium to nitrate ions
- identify nitrate ions as the nitrogen form absorbed by plant roots
- identify feeding as a process shared by the nitrogen and carbon cycles
CAIE IGCSE Biology 19.3.2 Nitrogen Cycle with Reference to Questions question 1
The diagram shows part of the nitrogen cycle.
What are the names of process X and process Y ?
X
Y
deamination
denitrification
nitrogen fixation
deamination
nitrogen fixation
nitrification
nitrification
denitrification
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