Question

Nitrogenase enzyme is a

• A. Magnesium-iron protein.
• B. Molybdenum-iron protein.
• C. Iron-copper protein.
• D. Nickel-iron protein.

Answer 1

Answer: (B)

Molybdenum-iron protein.

The molybdenum-iron protein is part of the nitrogenase complex that catalyzes the key enzymatic reactions in nitrogen fixation. Nitrogenases are enzymes that are produced by certain bacteria, such as cyanobacteria (blue-green algae). These enzymes are responsible for the reduction of nitrogen (N2) to ammonia (NH3). Nitrogenases are the only family of enzymes known to catalyze this reaction, which is a key step in the process of nitrogen fixation. So, the correct answer is option B.