alleryA common bacterium among the methanogens producing biogas from cattle dung is
AMethanobacterium
BLactobacillus lactis
CEscherichia coli
DStreptococcus
Answer & Solution
Correct answer: A. Methanobacterium
1. Methanogens are anaerobic bacteria that generate methane from cellulose.
2. syllabus names Methanobacterium as one such common bacterium.
3. Methanobacterium is common in the anaerobic sludge of sewage treatment and cattle rumen.
4. Cattle dung is rich in these bacteria, hence gobar gas.
_Source: syllabus Biology, Ch 8 "Microbes in Human Welfare", §8.4_
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