Bacterial photosynthesis differs from that of higher plants in

Options

A. Not liberating oxygen
B. Non-requirement of light
C. Non-fixation of energy
D. Requirement of host organism.

Answer

**Step-by-Step Solution:**

1. **Understanding Photosynthesis in Higher Plants:**
- Higher plants perform photosynthesis using water (H2O) as the electron donor.
- During this process, they absorb carbon dioxide (CO2) and release oxygen (O2) as a byproduct.

2. **Understanding Photosynthesis in Bacteria:**
- Certain bacteria, known as photosynthetic bacteria, also perform photosynthesis but differ significantly from higher plants.
- These bacteria can use substances other than water for photosynthesis.

3. **Types of Photosynthetic Bacteria:**
- Most photosynthetic bacteria utilize a single photosystem (PS-1) and do not produce oxygen.
- Cyanobacteria, however, are a type of photosynthetic bacteria that can use both photosystems (PS-1 and PS-2) and are capable of oxygenic photosynthesis, similar to higher plants.

4. **Electron Donors in Bacterial Photosynthesis:**
- Instead of using water, many photosynthetic bacteria use hydrogen sulfide (H2S) as an electron donor.
- The process results in the release of sulfur (S) instead of oxygen.

5. **Conclusion:**
- The key difference between bacterial photosynthesis and that of higher plants is that bacterial photosynthesis does not liberate oxygen; instead, it liberates sulfur when hydrogen sulfide is used.

**Final Answer:**
Bacterial photosynthesis differs from that of higher plants in that it does not liberate oxygen; instead, it liberates sulfur.

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