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, decomposition and denitrification on cycle diagrams
- trace nitrate uptake into plant amino acids and proteins, then transfer through feeding
- identify ammonium and nitrate ions and link each bacterial process to its conversion
- identify deamination and protein decomposition as nitrogen-cycle transitions
CAIE IGCSE Biology 19.3.2 Nitrogen Cycle with Reference to Questions question 1
Fig. 5.1 is a diagram of a plant root hair cell.
Key
× nitrate ion
- water molecule
Fig. 5.1
State two ways that nitrogen fixation occurs.
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