`NADP^(+)` is converted into NADPH in

Options

A. Cyclic ETS
B. Non-cyclic ETS
C. Calvin cycle
D. Photosystem-II

Answer

To answer the question, "NADP^(+) is converted into NADPH in," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Context**:
- NADP^(+) (Nicotinamide adenine dinucleotide phosphate) is a coenzyme that acts as an electron carrier in photosynthesis.

2. **Identifying the Processes**:
- There are two types of electron transport systems (ETS) in photosynthesis: cyclic and non-cyclic photophosphorylation.
- Cyclic photophosphorylation primarily produces ATP, while non-cyclic photophosphorylation produces both ATP and NADPH.

3. **Focusing on Non-Cyclic Photophosphorylation**:
- In non-cyclic photophosphorylation, light energy is absorbed by chlorophyll, which excites electrons.
- These excited electrons are transferred through a series of proteins in the thylakoid membrane.

4. **Electron Flow**:
- The process begins with the absorption of light by Photosystem II (P680), which excites electrons.
- The electrons are then passed to an electron transport chain, where they eventually reach Photosystem I (P700).

5. **Formation of NADPH**:
- The final electron acceptor in this chain is NADP^(+).
- The electrons, along with protons (H^+), reduce NADP^(+) to form NADPH.

6. **Conclusion**:
- Therefore, NADP^(+) is converted into NADPH during the non-cyclic photophosphorylation process in photosynthesis.

### Final Answer:
NADP^(+) is converted into NADPH in the non-cyclic photophosphorylation process.

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