Photolysis of water is associated with

Options

A. PS I
B. PS II
C. Stroma lamella
D. Stroma of chloroplast

Answer

### Step-by-Step Solution:

1. **Understanding Photolysis**:
- Photolysis refers to the process of breaking down a compound using light energy. In this case, it specifically refers to the breakdown of water (H₂O) molecules.

2. **Chemical Reaction**:
- The photolysis of water can be summarized by the following chemical equation:
\[ 2 H_2O \rightarrow 4 H^+ + 4 e^- + O_2 \]
- This indicates that two water molecules split into four protons (H⁺), four electrons (e⁻), and one molecule of oxygen (O₂).

3. **Role of Photosystem II**:
- The process of photolysis of water occurs in the light-dependent reactions of photosynthesis, specifically associated with Photosystem II (PS II).
- PS II absorbs light energy, particularly at a wavelength of around 680 nanometers, which is crucial for initiating the photolysis reaction.

4. **Electron Replacement**:
- The electrons released from the splitting of water molecules are used to replace the electrons lost by PS II when it absorbs light. This is essential for the continuation of the photosynthetic process.

5. **Conclusion**:
- Therefore, the photolysis of water is primarily associated with Photosystem II in the process of photosynthesis.