Question

Photosynthetic bacteria differ from green plants in

• A. Nature of their pigments
• B. Type of electron donors
• C. Photosynthetic process being non-oxygenic
• D. All of the above

Answer 1

Answer: (D)

All of the above

• The process of photosynthesis in bacteria and plants is different. Bacterial photosynthesis is mostly an anoxygenic process, here O2 is not evolved, whereas plant photosynthesis is an anoxygenic process and O2is evolved during the process.
• In bacteria, the photosynthetic pigment involved is bacteriochlorophyll whereas chlorophyll in green plants. The main difference between bacterial and plant photosynthesis is the difference in the electron donor.
• In the bacterial systems, H2S or thiosulfate mostly acts as an electron donor, and in the plant system, H2O acts as an electron donor, so oxygen is produced in plant photosynthesis but not in bacterial photosynthesis.

So the correct answer is option D.