Question

A photosynthetic organism which does not release oxygen is

• A. Blue-green alga
• B. Green sulphur bacterium
• C. Green alga
• D. Algal component of lichen

Answer 1

The correct option is B Green sulphur bacterium

Characteristics of Green Sulphur Bacteria are:-

1. Contain chromatophores.
2. Use longer wavelength (720-950).
3. No utilization of water instead of $H_2$ is used for proton.
4. The release of sulphur in place of oxygen.
5. It occurs in light but in absence of oxygen.

So the correct option is 'Green sulphur bacterium'.