Which of the following bacteria is free-living in the soil?

  • A
    Azospirillum
  • B
    Rhizobium
  • C
    Oscillatoria
  • D
    Trichoderma

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If all the $Nitrogenase$ enzymes are inactivated by radiation,then which of the following will not occur?

Which of the following is a free-living aerobic bacterium capable of nitrogen fixation?

The enzyme responsible for the reduction of molecular nitrogen to the level of ammonia in leguminous root nodule is

Nitrogen-fixing bacteria convert which of the following?

Complete the given reaction:
$N_2 + 8e^- + 8H^+ + 16 \,ATP \rightarrow$

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