Oxygenic photosynthesis | Anoxygenic photosynthesis |
It is shown by cyanobacteria, algae and plants. | It is shown by purple bacteria, green sulfur and nonsulfur bacteria, heliobacteria and acidobacteria. |
Oxygen is released at the end of photosynthesis. | Oxygen is not released during photosynthesis. |
Photosynthesis comprises of photosystem I and II. | Only one photosystem is involved in photosynthesis. |