Plastocyanin is a protein containing

Options

A. Mo
B. Zn
C. Fe
D. Cu

Explanation

**Step-by-Step Solution:**

1. **Understanding Plastocyanin**: Plastocyanin is a type of protein found in plants, specifically involved in the photosynthetic process.

2. **Identifying the Composition**: It is important to recognize that Plastocyanin is classified as a copper protein. This means that it contains copper as a significant component.

3. **Function of Plastocyanin**: The primary role of Plastocyanin is to act as a mobile electron carrier within the photosynthetic electron transport chain. This is crucial for the process of converting light energy into chemical energy.

4. **Analyzing the Options**: The question provides several options:
- MO (molybdenum)
- ZN (zinc)
- FE (iron)
- SU (copper)

5. **Selecting the Correct Answer**: Since Plastocyanin is specifically identified as a copper-containing protein, the correct answer is option D, which stands for copper.

6. **Location of Plastocyanin**: Plastocyanin is located in the lumen of thylakoids, which are part of the chloroplasts in plant cells where photosynthesis occurs.

**Final Answer**: Plastocyanin is a protein containing copper (option D).

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