NADPH is generated through

Options

A. photosystem-I
B. photosystem-II
C. anaerobic respiration
D. glycolysis

Explanation

**Step-by-Step Solution:**

1. **Understanding NADPH Generation**: NADPH is a crucial molecule involved in the photosynthetic process, specifically in the light-dependent reactions of photosynthesis.

2. **Identifying the Processes**: The generation of NADPH occurs primarily through two key processes in photosynthesis: non-cyclic photophosphorylation and cyclic photophosphorylation. However, only non-cyclic photophosphorylation is directly responsible for the production of NADPH.

3. **Role of Photosystems**: In non-cyclic photophosphorylation, both Photosystem II (PS2) and Photosystem I (PS1) are involved. PS2 captures light energy and initiates the process by splitting water molecules (photolysis), releasing electrons.

4. **Electron Transport Chain**: The electrons released from water are transferred through an electron transport chain, leading to the generation of ATP and NADPH.

5. **NADP+ Reduction**: The electrons ultimately reach Photosystem I (PS1), where they are used to reduce NADP+ to NADPH. This reduction is facilitated by the energy absorbed by PS1.

6. **Conclusion**: Therefore, NADPH is generated primarily through the action of Photosystem I during the non-cyclic photophosphorylation process.

**Final Answer**: NADPH is generated through Photosystem I during the non-cyclic photophosphorylation process.

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