Non-cyclic electron flow in chloroplast/light reaction results in production of

Options

A. `ATP`
B. `ATP` and `NADPH`
C. `ATP, NADPH, O_(2)`
D. `NADPH`.

Answer

To answer the question about the products of non-cyclic electron flow in chloroplasts during the light reaction of photosynthesis, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Non-Cyclic Electron Flow**: Non-cyclic electron flow is a process that occurs in the light-dependent reactions of photosynthesis. It involves the movement of electrons through a series of proteins in the thylakoid membrane.

2. **Initiation of the Process**: The process begins when light energy is absorbed by chlorophyll in Photosystem II (PSII). This light energy excites electrons, which are then transferred to an electron transport chain.

3. **Electron Transport Chain**: As the excited electrons move through the electron transport chain, they lose energy. This energy is used to pump protons (H⁺ ions) into the thylakoid lumen, creating a proton gradient.

4. **ATP Synthesis**: The proton gradient generated drives ATP synthesis through ATP synthase, a process known as chemiosmosis. Therefore, ATP is produced during this phase.

5. **Photosystem I (PSI)**: The electrons eventually reach Photosystem I (PSI), where they are re-excited by light energy absorbed by chlorophyll. The re-excited electrons are transferred to another electron carrier.

6. **NADPH Formation**: The electrons from PSI are ultimately used to reduce NADP⁺ to NADPH, a crucial energy carrier in the cell.

7. **Water Splitting**: To replace the electrons lost from PSII, water molecules are split (photolysis) in the thylakoid lumen. This reaction releases oxygen (O₂) as a byproduct.

8. **Final Products**: The overall products of non-cyclic electron flow are ATP, NADPH, and O₂.

### Conclusion:
Thus, the non-cyclic electron flow in chloroplasts during the light reaction results in the production of **ATP, NADPH, and oxygen (O₂)**.