Where is the water - splitting complex associated with PS - II situated ?

Options

A. Inner side of chloroplast outer membrane
B. Inner side of thylakoid membrane
C. Outer side of thylakoid membrane
D. Inner side of chloroplast outer membrane

Answer

To answer the question "Where is the water-splitting complex associated with PS-II situated?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Photosystem II (PS-II)**:
- Photosystem II is one of the two photosystems involved in the light-dependent reactions of photosynthesis. It plays a crucial role in the process of photolysis, which is the splitting of water molecules.

2. **Function of the Water-Splitting Complex**:
- The water-splitting complex associated with PS-II is responsible for splitting water (H₂O) into oxygen (O₂), protons (H⁺), and electrons (e⁻). This process is essential for providing electrons to replace those lost by PS-II during the light reactions.

3. **Location of the Water-Splitting Complex**:
- The water-splitting complex is located in the thylakoid membranes of the chloroplasts. The thylakoids are membrane-bound structures that contain chlorophyll and other pigments necessary for photosynthesis.

4. **Identifying the Correct Location**:
- The question provides multiple options regarding the location of the water-splitting complex:
- Inner side of chloroplast outer membrane
- Inner side of thylakoid membrane
- Outer side of thylakoid membrane
- Inner side of chloroplast outer membrane
- Based on our understanding, the water-splitting complex is situated on the inner side of the thylakoid membrane.

5. **Conclusion**:
- Therefore, the correct answer to the question is: **Inner side of thylakoid membrane**.