Cyclic photophosphorylation operates absorbing light of

Options

A. more than `680 nm` wavelength
B. less than 680 nm wavelength
C. less than 660 nm wavelength
D. wavelength between 660-680 nm wavelength

Answer

To solve the question regarding the wavelength of light absorbed during cyclic photophosphorylation, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Process of Cyclic Photophosphorylation**:
- Cyclic photophosphorylation is a process that occurs in the thylakoid membranes of chloroplasts, primarily involving Photosystem I (PSI).
- In this process, electrons are excited by light energy and move in a circular pathway, generating ATP.

2. **Identify the Role of Light in Cyclic Photophosphorylation**:
- Light energy is essential for exciting electrons in PSI. The energy from the light allows the electrons to move and participate in the formation of ATP.

3. **Determine the Wavelength of Light Absorbed**:
- The question specifically asks about the wavelength of light absorbed during cyclic photophosphorylation.
- It is known that cyclic photophosphorylation operates efficiently with light wavelengths that are longer than 680 nanometers.

4. **Analyze the Options Given**:
- The options provided are:
1. More than 680 nanometers
2. Less than 680 nanometers
3. Less than 660 nanometers
4. Wavelength between 660 to 680 nanometers
- Based on the understanding of cyclic photophosphorylation, the correct option is that it operates with light of more than 680 nanometers.

5. **Conclusion**:
- Therefore, the answer to the question is that cyclic photophosphorylation operates absorbing light of **more than 680 nanometers**.

### Final Answer:
Cyclic photophosphorylation operates absorbing light of **more than 680 nanometers**.

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