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Methanogenic bacteria are not found in:
a. rumen of cattle
b. gobar gas plant
c. bottom of water-logged paddy fields
d. activated sludge
Answers (1)
The answer is option (d) activated sludge.
Explanation: Methanogenic bacteria are anaerobic bacteria. They produce methane as a byproduct in hypoxic conditions (lack of oxygen). Activated sludge is dominated by aerobic bacteria that grow very rapidly to form flocs. Methanogenic bacteria are commonly found in environments including wetlands, sewage treatment plants, and the digestive systems of various animals like termites, cows, and humans. In cattle, these bacteria, particularly Methanobacterium, play a key role in the breakdown of cellulose into glucose in the rumen, thereby providing energy for the animals.
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