Wavelength of light that carries out photosynthesis in bacteria is

Options

A. Blue
B. Red
C. Ultraviolet
D. Near infra red or far red

Answer

To determine the wavelength of light that carries out photosynthesis in bacteria, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Photosynthesis in Bacteria**:
- Photosynthesis in bacteria differs from that in higher plants. While plants primarily use chlorophyll a (P680 and P700) for photosynthesis, some bacteria utilize different pigments.

2. **Identifying Wavelengths**:
- The question provides several options for light wavelengths:
- Blue: 425 to 450 nm
- Red: 600 to 700 nm
- Ultraviolet: 100 to 400 nm
- Near Infrared/Far Red: 700 to 800 nm

3. **Analyzing Bacterial Photosynthesis**:
- Bacteria, particularly photosynthetic bacteria, can utilize a broader spectrum of light for photosynthesis compared to plants. They can absorb light in the far red region.

4. **Selecting the Correct Wavelength**:
- Among the given options, the wavelength range that corresponds to the near infrared or far red light (700 to 800 nm) is significant for certain photosynthetic bacteria.

5. **Conclusion**:
- Therefore, the wavelength of light that carries out photosynthesis in bacteria is primarily in the near infrared or far red range (700 to 800 nm).

### Final Answer:
The wavelength of light that carries out photosynthesis in bacteria is **near infrared or far red (700 to 800 nm)**.