Question

Methanogens mainly produce ______ by acting on ______.

• A. methane, cellulosic material anaerobically
• B. oxygen, cellulosic material anaerobically
• C. methane, cellulosic material aerobically
• D. carbon dioxide, cellulose material aerobically

Answer 1

The correct option is A methane, cellulosic material anaerobically

Methanogens are microbes that belong to the domain Archae which include primitive forms of prokaryotes (organisms which do not have a well-developed nucleus). These archaebacteria prefer living in extreme conditions of temperature ranging from 4$°$ to 100$°$C.

These are obligate anaerobic bacteria that can only respire in the absence of oxygen to produce energy. Hence they produce methane anaerobically.
These bacteria are also found in the cow dung. The most common methanogen is Methanobacterium. Plant food, consumed by ruminating animals, mostly consists of cellulose. Therefore the cow dung will also consist of cellulosic material . These methanogens present in the cowdung acts on the cellulosic material anaerobically.
They reduce carbon dioxide with the help of hydrogen to form methane and water. This process helps to produce energy in the form of ATP.