Ferrodoxin contains

Options

A. Mg
B. Co
C. Iron
D. Nitrite.

Answer

**Step-by-Step Solution:**

1. **Understanding Ferredoxin**: Ferredoxin is a type of protein that plays a crucial role in electron transfer in various biological processes, particularly in photosynthesis.

2. **Identifying the Components**: The question asks what Ferredoxin contains. The options provided are Magnesium, Cobalt, Iron, and Nitride.

3. **Analyzing the Options**:
- **Magnesium**: While magnesium is important in biological systems, it is primarily associated with chlorophyll, not Ferredoxin.
- **Cobalt**: Cobalt is found in certain enzymes, such as methionine aminotransferase, but it is not a component of Ferredoxin.
- **Iron**: Ferredoxin is specifically known to be an Iron-Sulfur protein, meaning it contains iron as a key component.
- **Nitride**: Nitride is not a component of proteins and does not relate to Ferredoxin.

4. **Conclusion**: Based on the analysis, the correct answer is Iron, as Ferredoxin is an Iron-Sulfur containing protein that is involved in electron transfer processes.

5. **Additional Information**: Ferredoxin is located on the stromal side of the thylakoid membrane and receives electrons from photosystem I, which are then used to reduce NADP+ to NADPH, a reaction catalyzed by the enzyme NADP reductase.

**Final Answer**: Ferredoxin contains Iron.

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