The primary electron acceptor in PSII is

Options

A. Ferredoxin
B. PQ
C. Plastocyanin
D. Pheophytin

Answer

**Step-by-Step Solution:**

1. **Understanding Photosystem II (PSII)**:
- Photosystem II is a crucial component of the photosynthetic process in higher plants. It primarily functions to absorb light energy and convert it into chemical energy in the form of ATP.

2. **Role of Water in PSII**:
- PSII is involved in the photolysis of water, which is the process of splitting water molecules into oxygen, protons, and electrons. This reaction not only produces oxygen as a byproduct but also provides the necessary electrons for the photosynthetic electron transport chain.

3. **Electron Transport Chain**:
- Once water is split, the electrons released are transferred to the primary electron acceptor of PSII. This is a critical step in the electron transport chain, which ultimately leads to the generation of ATP.

4. **Identifying the Primary Electron Acceptor**:
- The primary electron acceptor in PSII is a molecule known as **pheophytin**. Pheophytin is a type of chlorophyll derivative that acts as the first electron carrier in the process of photosynthesis.

5. **Conclusion**:
- Therefore, the primary electron acceptor in PSII is **pheophytin**.

**Final Answer**: The primary electron acceptor in PSII is **pheophytin**.

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