Photo-oxidation or photolysis of water (in photosynthesis) occurs in association of

Options

A. Cytochrome `B_(6)`
B. Plastocyanin
C. PS II
D. PS I

Answer

To answer the question regarding the association of photo-oxidation or photolysis of water in photosynthesis, we can follow these steps:

### Step 1: Understand the Process of Photolysis
Photolysis of water refers to the splitting of water molecules into hydrogen ions, electrons, and oxygen gas. This is a crucial step in the process of photosynthesis.

### Step 2: Identify Where Photolysis Occurs
Photolysis occurs in the thylakoid membranes of chloroplasts during the light-dependent reactions of photosynthesis. Specifically, it is associated with Photosystem II (PS2).

### Step 3: Recognize the Role of Photosystem II
Photosystem II is responsible for capturing light energy and using it to energize electrons. This process leads to the photolysis of water, where water molecules are split to provide electrons that replace those lost by chlorophyll in PS2.

### Step 4: Understand the Wavelength of Light Involved
Photosystem II operates optimally at a wavelength of around 680 nanometers. This shorter wavelength light is essential for driving the photolysis reaction.

### Step 5: Conclusion
Based on the above steps, we conclude that the photolysis of water in photosynthesis occurs in association with Photosystem II (PS2).

### Final Answer
The correct answer is **Photosystem II (PS2)**.

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