The Question is from neet-botany mineral-nutrition n2-metab0lism, and it was created by the author B VENKAT

Question

Which of the following statements is INCORRECT regarding the nitrogenase enzyme complex?

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
	**Primary Concept**: Nitrogen Fixation and Nitrogenase
	**Related Topics**: Enzyme Catalysis, Metalloenzymes, Redox Reactions
	**Prerequisites**: Basic understanding of enzyme function, redox reactions, and biological nitrogen fixation.
## SOLUTION PATHWAY
**Given Information**:
	The question asks for the INCORRECT statement about the nitrogenase enzyme complex.
**Method & Steps**:
	1. Analyze each option based on the known properties of nitrogenase.
	2. Identify the statement that contradicts established knowledge about nitrogenase.
	3. Confirm the correctness of the other options.
## OPTION ANALYSIS
[A] ✓: It requires ATP.  Nitrogenase requires a significant input of energy in the form of ATP to drive the energetically demanding reduction of nitrogen to ammonia. This is a correct statement.
[B] ✓: It is a metalloenzyme containing iron and molybdenum. The nitrogenase complex contains an iron-sulfur protein and a molybdenum-iron protein.  These metal centers are crucial for electron transfer and nitrogen reduction. This is a correct statement.
[C] :x: It is insensitive to oxygen. Nitrogenase is extremely sensitive to oxygen. Oxygen irreversibly inactivates the enzyme, making it essential for nitrogen-fixing organisms to protect nitrogenase from exposure to oxygen. This is the incorrect statement and thus the answer.
[D] ✓: It catalyzes the reduction of N2 to NH3. The primary function of nitrogenase is to catalyze the conversion of atmospheric nitrogen (N2) to ammonia (NH3). This is a correct statement.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing the sensitivity of nitrogenase to oxygen: Remember that nitrogenase is highly sensitive to and inhibited by oxygen.
		2. Overlooking the energy requirement of nitrogen fixation:  The reduction of nitrogen to ammonia is energy-intensive and requires ATP hydrolysis.
	**Quick Tips**:
		1. Remember the acronym 'FeMoCo' to recall the essential metal cofactors of nitrogenase (Iron, Molybdenum, Cobalt).
		2. Associate nitrogenase with anaerobic conditions or specialized mechanisms for oxygen protection in nitrogen-fixing organisms.

B VENKAT · Answer

It requires ATP.

B VENKAT · Answer

It is a metalloenzyme containing iron and molybdenum.

B VENKAT · Answer

The correct Option is "It is insensitive to oxygen."

B VENKAT · Answer

It catalyzes the reduction of N2 to NH3.

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