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Q.
Oxygen is not produced during photosynthesis by
Biological Classification
Solution:
Green sulphur bacteria are anaerobic bacteria. They do not produce oxygen during photosynthesis. Such type of photosynthesis is known as anoxygenic photosynthesis. These bacteria do not use water as a source of reducing power. Instead, hydrogen is obtained from hydrogen sulphide. The entire photosynthetic process of a green sulphur bacteria can be represented by the following reactions
$\underset{\text{Hydrogen sulphide}}{H _{2} S} \rightarrow 2[ H ]+ S$
$6 CO _{2}+12 H _{2} \xrightarrow[\text{Enzymes}]{\text { Light }} C _{6} H _{12} O _{6}+6 H _{2} O$