Some Normally Aerobic Bacteria, Which Include Species of the Genera

Multiple Choice

Some normally aerobic bacteria, which include species of the genera Bacillus and Pseudomonas, use nitrate (NO₃^-) as an electron acceptor in place of oxygen if they are kept under anaerobic conditions.Which of the following statements concerning these ecologically important bacteria is false?

A) They act as denitrifiers.
B) They release nitrogen to the atmosphere as nitrogen gas (N₂) .
C) Without their conversion of soil nitrogen to atmospheric gas, soil nitrogen would leach into lakes and rivers.
D) They convert ammonia (NH₃) to nitrate (NO₃^-) , which is available to plants.
E) They convert nitrate ions to nitrogen gas (N₂) .