which one of the following elements is required for photosynthesis oxygen evolution

Options

A. Fe
B. Zn
C. Co
D. Mn

Answer

To answer the question regarding which element is required for photosynthesis oxygen evolution, we need to understand the process of photolysis of water, which is a crucial part of the light-dependent reactions in photosynthesis.

### Step-by-Step Solution:

1. **Understanding Photolysis of Water**:
- Photolysis refers to the splitting of water molecules into oxygen, protons, and electrons using light energy. This process occurs during the light-dependent reactions of photosynthesis.

2. **Location of Photolysis**:
- Photolysis occurs in the thylakoid membranes of chloroplasts, where chlorophyll absorbs light energy.

3. **Elements Required for Photolysis**:
- The main elements required for the photolysis of water are manganese and chlorine. These elements play a crucial role in the process of splitting water molecules.

4. **Analyzing the Options**:
- **Nitrogen**: Not required for photolysis.
- **Oxygen**: This is a product of photolysis, not a reactant.
- **Chlorine**: Correct, as it is one of the elements required for photolysis.
- **Carbon**: Not required for photolysis.

5. **Conclusion**:
- The correct answer is **Chlorine**, as it is essential for the photolysis of water during photosynthesis.

### Final Answer:
**Chlorine** is the element required for photosynthesis oxygen evolution.

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