Which one not take part in electron transfer

Options

A. `CoQ`
B. `FeS`
C. `ATP`
D. `NAD^(+)`

Answer

To solve the question "Which one does not take part in electron transfer?" we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Electron Transfer in Photosynthesis**:
- In photosynthesis, electron transfer occurs primarily in two photosystems: Photosystem I (PSI) and Photosystem II (PSII).
- PSI is responsible for generating NADPH, while PSII is involved in the production of ATP.

2. **Identifying Components Involved in Electron Transfer**:
- The main components involved in the electron transfer chain during photosynthesis are the two photosystems (PSI and PSII), along with other molecules like plastoquinone, cytochrome b6f, and plastocyanin.

3. **Recognizing the Role of ATP**:
- ATP is produced as a result of the electron transfer process, particularly in PSII. However, ATP itself does not participate in the transfer of electrons; it is an energy currency generated from the process.

4. **Conclusion**:
- Since the question asks for the component that does not take part in the electron transfer, the answer is ATP, as it is produced from the energy generated by the electron transfer rather than being a participant in the transfer itself.

### Final Answer:
- The correct answer is **ATP** (Option C).

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