Home Biology Biological Classification Skill Builder Which of the following statements is not cor…
Biology Biological Classification Skill Builder Single Correct MCQ
Published on: August 13, 2026

Which of the following statements is not correct for methanogens?

A
They are archaebacteria.
B
They live in carshy areas.
C
Methane is their preferred carbon source.
D
They are present in guts of several ruminant animals (cow,buffaloes) and produce biogas (CH 4 ) from the dung of these animals.

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The correct answer is:
C

because methanogens do not use methane as a carbon source; instead, they produce methane as a metabolic byproduct. They are chemoautotrophs or chemoheterotrophs that typically use carbon dioxide (CO 2 ), hydrogen (H 2 ), acetate, or methanol as substrates for their energy metabolism.

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