With reference to photosynthesis, what is the `CF_(0) - CF_(1)` complex?

Options

A. ATP synthetase
B. Ferrodoxin - NADP reductase
C. Cytochrome `(b_(6))//("fCOMPLEX")`
D. RuBP carboxylase

Answer

### Step-by-Step Solution:

1. **Understanding the CF0-CF1 Complex**: The CF0-CF1 complex is a crucial component of the photosynthetic process in higher plants, specifically involved in ATP synthesis.

2. **Identifying the Function**: This complex functions as ATP synthetase, which is responsible for synthesizing ATP from ADP and inorganic phosphate (Pi) during the light-dependent reactions of photosynthesis.

3. **Location in the Chloroplast**: The CF0-CF1 complex is located in the thylakoid membrane of chloroplasts. The CF0 part is embedded in the membrane, while the CF1 part protrudes into the stroma of the chloroplast.

4. **Role in Electron Transport Chain**: The CF0-CF1 complex is associated with the photosynthetic electron transport chain. It utilizes the proton gradient generated by the electron transport chain to drive the synthesis of ATP.

5. **Energy Production**: During the light reactions of photosynthesis, light energy is converted into chemical energy, leading to the production of ATP and NADPH, which are then used in the Calvin cycle for carbon fixation.

6. **Conclusion**: Therefore, the CF0-CF1 complex is identified as ATP synthetase, which plays a vital role in converting light energy into chemical energy in the form of ATP.

### Final Answer:
The CF0-CF1 complex refers to ATP synthetase, which is essential for ATP production during photosynthesis.

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