Types
There are 2 Types of Photosynthesis :
Oxygenic photosynthesis.
Anoxygenic photosynthesis.
Oxygenic photosynthesis
Oxygenic photosynthesis is a process that uses light energy to create oxygen and organic matter, and is the primary producer of both on Earth.
Cyanobacteria and algae – examples.
It occurs in two stages – light dependant reaction and light-independent reaction.
Water is the Electron Donor.
Both, Photosystem I and II are involved.
Non-cyclic photophosphorylation.
Anoxygenic photosynthesis
Anoxygenic photosynthesis is a process that uses light energy to convert carbon in carbon dioxide (CO) into ATP without producing oxygen.
Green sulphur bacteria, green and red filamentous anoxygenic phototrophs (FAPs) – examples.
Water is not used as an electron donor. Hydrogen, ferrous ions or hydrogen sulphide are used as electron donors
Photosystem I is present, photosystem II is absent.
Cyclic photophosphorylation.
How does the electron transport chain differ in oxygenic and anoxygenic photosynthesis?
How does the presence of oxygen affect the type of photosynthesis?
What role do chlorophyll and bacteriochlorophyll play in these processes?
How does the splitting of water molecules occur in oxygenic photosynthesis?
What alternative electron donors are used in anoxygenic photosynthesis?
How do environmental conditions influence the type of photosynthesis an organism uses?
What is the significance of Photosystem I and Photosystem II in oxygenic photosynthesis?
How do anoxygenic photosynthetic bacteria adapt to low-light conditions?
What are the ecological impacts of oxygenic and anoxygenic photosynthesis?
How do these types of photosynthesis contribute to the global carbon cycle?