Biological Nitrogen Fixation (BNF) Is Inhibited by Oxygen

question 26

Multiple Choice

Biological nitrogen fixation (BNF) is inhibited by oxygen. Which of the following statements is NOT correct?

• A) Nitrogen fixation is ubiquitous in soil and water.
• B) Cyanobacteria are among the significant prokaryotic nitrogen fixers.
• C) BNF was the major source of fixed N before the Industrial Revolution.
• D) Only anaerobes fix dinitrogen on land.
• E) A wide diversity of prokaryotes use the same enzyme-nitrogenase for nitrogen fixation.

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