In which one of the following, methano- gens, i.e., methane producing bacteria are not present ?
[amp_mcq option1=”Rumen of cattle” option2=”Aerobic environment” option3=”Anaerobic sludge” option4=”Excreta of cattle” correct=”option2″]
This question was previously asked in
UPSC NDA-2 – 2016
Methanogens are a group of anaerobic archaea that produce methane as a metabolic byproduct in anoxic conditions. They are strictly anaerobic, meaning oxygen is toxic to them.
Methanogens thrive in environments where oxygen is absent and organic matter is undergoing decomposition. Examples include the digestive tracts of ruminants (like cattle rumen), anaerobic sludge digesters in wastewater treatment, and sediments in swamps and marshes.