Edexcel IGCSE Biology 4 11b Nitrogen Cycle Questions
Practise nitrogen cycle questions on bacteria, nitrates, ammonia, denitrification and interpreting soil, river or biomass data.
- Syllabus
- First assessment 2019
- Course
- Biology 4BI1
Exam points
- name nitrogen fixation, nitrification and denitrification from labelled cycle processes
- explain nitrate production or removal using bacteria in soil, rivers or bioreactors
- calculate nitrogen masses or percentages from process data, including standard form answers
Edexcel IGCSE Biology 4 11b Nitrogen Cycle Questions question 1
[Maximum number: 2]
Fish farming is often used to produce protein rich food.
Fish farming systems can often release ammonia into the water. The ammonia is converted into nitrates.
Describe how ammonia is converted into nitrates.
A description that makes reference to two of the following:
- nitrifying bacteria / nitrification
- (ammonium) to nitrite / nitrite to nitrate
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