Question

Anoxygenic photosynthesis is characteristic feature of

• A. Spirogyra.
• B. Chlamydomonas.
• C. Ulva.
• D. Rhodospirillum.

Answer 1

The correct option is D Rhodospirillum.

The photosynthetic bacteria are anaerobic. No oxygen is evolved in bacterial photosynthesis. Such type of photosynthesis is known as anoxygenic photosynthesis. Water is not used as a source of reducing power. Instead, hydrogen is obtained either directly or from various types of inorganic and organic compounds, e.g., $H_{2}S$, aliphatic compounds. Anoxygenic photosynthesis is characteristic of Rhodospirillum. It is a non-oxygenic photosynthetic bacteria.