Question

Oxygenic photosynthesis is found in
(a) Oscillatoria
(b) Chlorobium
(c) Chromatium
(d) Rhodospirillum

Answer 1

 Hint: Light energy transfers electrons from water to carbon dioxide during oxygen photosynthesis to create carbohydrates. This commonly is seen in algae, plants and cyanobacteria.

Complete Step by Step Answer:
Photosynthesis is the mechanism used to harness energy from sunlight by plants, algae and some bacteria and convert it into chemical energy.
Oxygenic photosynthesis and anoxygenic photosynthesis are two forms of photosynthetic processes. Oxygenic photosynthesis is found in Oscillatoria.
Light energy transfers electrons from water to carbon dioxide during oxygen photosynthesis to create carbohydrates.
So, the answer is ‘(a) Oscillatoria’.

Additional Information: The carbon dioxide is reduced or gains electrons in this process, and the water becomes oxidized or loses electrons. Oxygen is eventually created along with carbohydrates.
Anoxygenic photosynthesis uses electron donors rather than water, on the other hand. In bacteria such as purple bacteria and green sulphur bacteria, which are mainly found in different aquatic environments, the process usually occurs.
The formula for Oxygenic Photosynthesis is: $6{ CO }_{ 2 }+12{ H }_{ 2 }O+LightEnergy\longrightarrow { C }_{ 6 }{ H }_{ 12 }{ O }_{ 6 }+6{ O }_{ 2 }+6{ H }_{ 2 }O$
The formula for Anoxygenic Photosynthesis: ${ CO }_{ 2 }+2{ H }_{ 2 }A+LightEnergy\longrightarrow \left[ { CH }_{ 2 }O \right] +2A+{ H }_{ 2 }O$


Note:   - Oxygenic photosynthesis works by bringing in the carbon dioxide created by all breathing species and reintroducing oxygen to the atmosphere as a counterbalance to respiration. - Oxygen is not produced by anoxygenic photosynthesis. - What is generated depends on the donor of the electron. For instance, the bad-eggs-smelling gas hydrogen sulphide is used by many bacteria, producing solid sulphur as a by-product.