Final answer:
Denitrification requires bacteria under anaerobic conditions.
Step-by-step explanation:
Denitrification requires bacteria under anaerobic conditions.
Denitrifiers are important soil bacteria that use nitrate (NO3¯) as final electron acceptors, producing nitrogen gas (N₂). These bacteria switch to using nitrate as a final electron acceptor when oxygen levels have been depleted.
Microbes using anaerobic respiration commonly have an intact Krebs cycle and can access the necessary enzymes and metabolic pathways for denitrification.