Electrons from excited chlorophyll molecule of photosystem II are accepted first by
(a) Quinone
(b) Ferredoxin
(c) Cytochrome-b
(d) Cytochrome-f

Options

A. Quinone
B. Ferredoxin
C. Cytochrome-b
D. Cytochrome-f

Answer

To solve the question regarding the first electron acceptor from the excited chlorophyll molecule of photosystem II, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Photosystem II (PS II)**:
- Photosystem II (PS II) is a crucial component of the photosynthetic process in plants. It contains chlorophyll molecules that absorb light energy.

2. **Excitation of Chlorophyll**:
- When light energy is absorbed by the chlorophyll in PS II, it excites the electrons, raising them to a higher energy state. This process is essential for the conversion of light energy into chemical energy.

3. **Electron Transfer**:
- The excited electrons from the chlorophyll are then transferred to an electron transport chain. The first step in this chain involves the transfer of these electrons to an electron acceptor.

4. **Identifying the First Electron Acceptor**:
- The first electron acceptor in the electron transport chain following PS II is **Plastoquinone** (also referred to simply as Quinone). This molecule accepts the electrons from the excited chlorophyll.

5. **Conclusion**:
- Based on the above understanding, the correct answer to the question is **(a) Quinone**.

### Final Answer:
- The electrons from the excited chlorophyll molecule of photosystem II are accepted first by **(a) Quinone**.

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