Which one of the following statements about the events of non-cyclic photophosphorylation is not correct

Options

A. photolyssis of water takes place
B. only one photosystem participates
C. ATP and NADPH are produced
D. `O_(2)`, is released

Answer

### Step-by-Step Solution

1. **Understanding Non-Cyclic Photophosphorylation**:
Non-cyclic photophosphorylation is a process that occurs during the light-dependent reactions of photosynthesis. It involves the movement of electrons in a non-cyclic manner, which means that the electrons are not recycled back to the photosystem from which they originated.

**Hint**: Remember that non-cyclic photophosphorylation involves a one-way flow of electrons.

2. **Role of Photosystems**:
In non-cyclic photophosphorylation, both Photosystem II (PSII) and Photosystem I (PSI) are involved. PSII absorbs light energy, which excites electrons that are then transferred through a series of proteins, ultimately reaching PSI.

**Hint**: Identify the roles of both Photosystem II and Photosystem I in the electron transport chain.

3. **Photolysis of Water**:
During this process, water molecules are split (photolysis) to provide electrons to replace those lost by PSII. This reaction also releases oxygen as a byproduct.

**Hint**: Recall that photolysis is essential for supplying electrons and releasing oxygen.

4. **Production of ATP and NADPH**:
The energy from the excited electrons is used to generate ATP and NADPH, which are crucial for the Calvin cycle in the next phase of photosynthesis.

**Hint**: ATP and NADPH are the energy carriers produced during the light reactions.

5. **Identifying the Incorrect Statement**:
The question asks for the statement that is NOT correct about non-cyclic photophosphorylation. The options provided include:
- Photolysis of water takes place. (Correct)
- Only one photosystem participates. (Incorrect)
- ATP and NADPH are produced. (Correct)
- O2 is released. (Correct)

The incorrect statement is that "only one photosystem participates," as both PSII and PSI are involved in non-cyclic photophosphorylation.

**Hint**: Look for statements that contradict the known roles of the photosystems in non-cyclic photophosphorylation.

### Conclusion
The statement that is not correct regarding non-cyclic photophosphorylation is: "Only one photosystem participates."