Biology A-Level
nitrogen-fixing bacteria
What nitrogen-fixing bacteria means in Biology A-Level, as defined for AQA.
Definition of nitrogen-fixing bacteria
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Reference: AQA
Free-living or mutualistic bacteria in legume root nodules that reduce atmospheric nitrogen to ammonia using nitrogenase and ATP.
Topics that use nitrogen-fixing bacteria
- Nutrient cycles (A-level only) (AQA A-Level)
Related terms
- algal bloom
- ammonification
- artificial fertilisers
- decomposers
- denitrification
- eutrophication
- extracellular digestion
- ion availability
Using nitrogen-fixing bacteria in the exam
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