The number of `P_(700)` molecules present in PS II comlex are

Options

A. one
B. two
C. three
D. none

Answer

To answer the question regarding the number of P700 molecules present in the PS II complex, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Photosystems**:
- There are two main photosystems involved in photosynthesis: Photosystem II (PS II) and Photosystem I (PS I). Each photosystem absorbs light at different wavelengths.

2. **Identify the Wavelengths**:
- PS II primarily absorbs light at a wavelength of approximately 680 nanometers (nm).
- PS I absorbs light at a wavelength of approximately 700 nanometers (nm).

3. **Determine the Location of P700**:
- P700 refers to the special pair of chlorophyll a molecules in PS I that absorb light at 700 nm. It is not found in PS II.

4. **Conclusion**:
- Since P700 is specifically associated with PS I and not with PS II, the number of P700 molecules present in the PS II complex is zero.

5. **Final Answer**:
- Therefore, the correct answer to the question is "none".