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Oxygenic photosynthesis occurs in
A
$Chlorobium$
B
$Chromatium$
C
$Oscillatoria$
D
$Rhodospirillum$
Detailed Solution
In oxygenic photosynthesis water is the hydrogen donor and oxygen is released: $6CO_2 + 12H_2O \rightarrow C_6H_{12}O_6 + 6H_2O + 6O_2$
Among prokaryotes it occurs only in cyanobacteria, which have chlorophyll a and both photosystems, like green plants.
$Oscillatoria$ is a cyanobacterium (blue-green alga).
$Chlorobium$ (green sulphur bacterium), $Chromatium$ (purple sulphur bacterium) and $Rhodospirillum$ (purple non-sulphur bacterium) carry out anoxygenic photosynthesis: they use $H_2S$ or organic compounds as the hydrogen donor and do not release oxygen.
Hence oxygenic photosynthesis occurs in $Oscillatoria$.
Among prokaryotes it occurs only in cyanobacteria, which have chlorophyll a and both photosystems, like green plants.
$Oscillatoria$ is a cyanobacterium (blue-green alga).
$Chlorobium$ (green sulphur bacterium), $Chromatium$ (purple sulphur bacterium) and $Rhodospirillum$ (purple non-sulphur bacterium) carry out anoxygenic photosynthesis: they use $H_2S$ or organic compounds as the hydrogen donor and do not release oxygen.
Hence oxygenic photosynthesis occurs in $Oscillatoria$.