Biological Nitrogen Fixation (BNF) Is Inhibited by Oxygen

question 20

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 same enzyme-nitrogenase for nitrogen fixation.

---

Definitions:

Algorithm

A step-by-step procedure or formula for solving a problem, often used in computing and mathematics.

Shopping List

A list of items to be purchased from a store, often used as a memory aid.

Emergency Room

A medical treatment facility specializing in emergency medicine, the acute care of patients who present without prior appointment.

Working Backward

A problem-solving strategy that involves starting from the desired solution or goal and working in reverse to determine the steps needed to reach that goal.