OEC is located in/on

Options

A. Outer surface of granal membrane
B. Lumen of stoma lamellae
C. inner surface on thylakoid membrane
D. Stroma

Answer

To answer the question "OEC is located in/on," we will break down the information step by step.

### Step-by-Step Solution:

1. **Understanding OEC**: OEC stands for Oxygen Evolving Complex. It is a crucial component in photosynthesis, specifically in the process of splitting water molecules.

2. **Function of OEC**: The primary role of the OEC is to facilitate the splitting of water (H2O) molecules during photosynthesis, which leads to the release of oxygen (O2). This process occurs in Photosystem II, a part of the photosynthetic apparatus in plants.

3. **Location of OEC**: The OEC is associated with the thylakoid membranes within the chloroplasts of plant cells. The thylakoid membranes are where the light-dependent reactions of photosynthesis take place.

4. **Specific Location**: The OEC is specifically located on the inner surface of the thylakoid membrane. This positioning allows it to effectively interact with the water molecules that are being split.

5. **Conclusion**: Therefore, the correct answer to the question "OEC is located in/on" is "inner surface of thylakoid membrane."

### Final Answer:
OEC is located on the inner surface of the thylakoid membrane.

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