Reaction centre of PS I is

Options

A. `P_700`
B. `P_680`
C. `chl_715`
D. `chl_685`

Answer

To answer the question regarding the reaction center of Photosystem I (PS I), we can break down the information step by step.

### Step-by-Step Solution:

1. **Understanding Photosystems**:
- There are two types of photosystems in plants: Photosystem I (PS I) and Photosystem II (PS II). Each has a specific role in the process of photosynthesis.

2. **Identifying the Reaction Centers**:
- Each photosystem has a specific reaction center characterized by the peak absorption wavelength of light.
- For Photosystem I, the reaction center is known as P700.
- For Photosystem II, the reaction center is known as P680.

3. **Analyzing the Options**:
- The options provided are:
1. P 700
2. P 680
3. Chlorophyll 715
4. Chlorophyll 685
- Since we are looking for the reaction center of PS I, we focus on the option that corresponds to P700.

4. **Conclusion**:
- The reaction center of Photosystem I (PS I) is P700.

### Final Answer:
The reaction center of PS I is **P 700**.

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