Question

Which of the following statements is not correct for methanogens?
A. they are archaebacteria
B. Methane is their preferred carbon source
C. they live in marshy areas.
D. they are present in guts of several ruminant animals.​

Answer 1

According to me it's answer is:

b) Methane is their preferred carbon source

Answer 2

The incorrect statement for methanogens is- B. Methane is their preferred carbon source.

• Methanogens are the prokaryotes that belong to the domain Archaebacteria and thrive in marshy areas. They are also found in the guts of several ruminant animals such as cows.
• Methane is not a preferred carbon source for methanogens. Instead, they produce methane gas as a byproduct during metabolic reactions under anaerobic conditions.
• Carbon dioxide is the preferred carbon source for methanogens.