Select the incorrect statement for nitrogenase enzyme.

Options

A. Active in anaerobic condition
B. Has limited substrate specificity
C. Oxidoreducatase nature
D. Has 2 components

Answer

To solve the question regarding the incorrect statement for the nitrogenase enzyme, follow these steps:

### Step 1: Understand the Function of Nitrogenase
Nitrogenase is an enzyme that plays a crucial role in nitrogen fixation, which is the process of converting atmospheric nitrogen (N2) into ammonia (NH3) or other usable forms of nitrogen. This process is primarily carried out by certain prokaryotic organisms, including nitrogen-fixing bacteria.

**Hint:** Remember that nitrogenase is essential for converting nitrogen gas into a form that plants can use.

### Step 2: Identify the Nature of Nitrogenase
Nitrogenase is known to be an oxido-reductase enzyme. This means it facilitates oxidation-reduction reactions, which are essential for the conversion of nitrogen gas to ammonia.

**Hint:** Recall that oxido-reductase enzymes are involved in electron transfer processes.

### Step 3: Assess the Conditions for Nitrogenase Activity
Nitrogenase is active under anaerobic conditions, meaning it functions in the absence of oxygen. Oxygen can inhibit its activity, making it crucial for nitrogen-fixing bacteria to thrive in low-oxygen environments.

**Hint:** Consider the relationship between oxygen levels and the activity of nitrogenase.

### Step 4: Evaluate Substrate Specificity
The statement regarding substrate specificity is critical. Nitrogenase does not have limited substrate specificity; instead, it has a broad range of substrates it can act upon. This means it can work with various nitrogen compounds, not just a limited few.

**Hint:** Think about how enzymes typically interact with multiple substrates rather than just one.

### Step 5: Identify the Incorrect Statement
Based on the understanding gained from the previous steps, the statement that nitrogenase has "limited substrate specificity" is incorrect. In reality, nitrogenase has a wide substrate specificity.

**Hint:** Look for statements that contradict the known properties of nitrogenase.

### Conclusion
The incorrect statement regarding nitrogenase enzyme is that it has limited substrate specificity. In fact, it has a broad substrate specificity.

**Final Answer:** The incorrect statement is that nitrogenase has limited substrate specificity.