What is incorrect about leghaemoglobin?

Options

A. Synthesized by host cell
B. Oxygen scavenger
C. It makes nodules blue coloured.
D. It reduces the enzyme nitrogenase

Answer

### Step-by-Step Solution:

1. **Understanding Leghaemoglobin**:
- Leghaemoglobin is a protein found in the root nodules of leguminous plants. It is similar to hemoglobin found in blood and is responsible for transporting oxygen within the nodules.

2. **Function of Leghaemoglobin**:
- Its primary role is to bind oxygen and facilitate its transport to the nitrogen-fixing bacteria (Rhizobia) present in the root nodules. This is crucial because these bacteria require a low-oxygen environment to effectively fix nitrogen.

3. **Characteristics of Leghaemoglobin**:
- Leghaemoglobin is red in color, which is due to the presence of heme groups that contain iron, similar to the hemoglobin in blood.

4. **Common Misconceptions**:
- There is a misconception regarding the color of leghaemoglobin. It is often incorrectly stated that it is blue in color. This is false; leghaemoglobin is indeed red.

5. **Incorrect Statement**:
- Among the statements provided, the incorrect one is that leghaemoglobin makes the nodule blue in color. The correct color is red.

6. **Conclusion**:
- The incorrect statement about leghaemoglobin is that it is associated with a blue color, while in reality, it is red.