For effective functioning of PS II, the ions required are

Options

A. `Mn^+,Cl^-`
B. `Mg^(+) and NO^(-3)`
C. `Fe^+ and Cl^(-)`
D. `K^+ and Na^+`

Answer

To determine the ions required for the effective functioning of Photosystem II (PS II), we can follow these steps:

### Step 1: Understand the Role of Photosystem II
Photosystem II (PS II) is a crucial component of the light-dependent reactions of photosynthesis. It is responsible for capturing light energy and using it to split water molecules (H2O) into oxygen (O2), protons (H+), and electrons.

**Hint:** Remember that PS II is involved in the initial steps of photosynthesis where light energy is converted into chemical energy.

### Step 2: Identify the Process Involved
The process that occurs in PS II is called photolysis, which is the splitting of water molecules. This process releases oxygen and provides electrons that are essential for the continuation of the photosynthetic process.

**Hint:** Think about what happens to water during photosynthesis and the importance of the byproducts.

### Step 3: Determine the Ions Required
For the effective functioning of PS II, certain ions are necessary. The key ions involved in the hydrolysis of water during the light-dependent reactions are manganese (Mn) and chlorine (Cl). Manganese plays a critical role in the water-splitting complex, while chlorine is involved in maintaining the structural integrity of the complex.

**Hint:** Focus on the specific ions that are known to facilitate the process of water splitting in PS II.

### Step 4: Conclusion
Based on the understanding of the role of PS II and the process of photolysis, we conclude that the ions required for the effective functioning of PS II are manganese (Mn) and chlorine (Cl).

**Final Answer:** The ions required for the effective functioning of PS II are manganese (Mn) and chlorine (Cl).

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