Photosystem II occurs in

Options

A. Stroma
B. cytochrome
C. Grana thylakoids
D. Mitochondrial surface.

Answer

**Step-by-Step Solution:**

1. **Understanding Photosystem II (PSII):**
- Photosystem II is a crucial component of the photosynthesis process. It is involved in the light-dependent reactions where it captures light energy.

2. **Identifying the Function of PSII:**
- The primary function of PSII is to absorb photons (light energy) and use that energy to extract electrons from water molecules. This process leads to the splitting of water, producing oxygen gas and hydrogen ions.

3. **Location of PSII:**
- PSII is located in the thylakoid membranes of chloroplasts. The thylakoids are organized into stacks known as granum (plural: grana).

4. **Evaluating the Options:**
- Given the options:
- a) Stroma
- b) Cytochrome
- c) Granulothylakoid
- d) Mitochondrial surface
- The correct option is the one that refers to the thylakoid membranes where PSII operates.

5. **Conclusion:**
- The correct answer is option c) Granulothylakoid, as it refers to the thylakoids where Photosystem II is located.

**Final Answer:** Photosystem II occurs in the granulothylakoid (thylakoid membranes).

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