NEET 2019 Odisha · BiologyArchaebacteriaPrevious Year Question
Which of the following statements about methanogens is not correct?
Answer: (C) They grow aerobically and breakdown cellulose- rich food.. Answer: (C) They grow aerobically and breakdown cellulose-rich food.
- A.They can be used to produce biogas.
- B.They are found in the rumen of cattle and their excreta
- C.They grow aerobically and breakdown cellulose- rich food.✓
- D.They produce methane gas.
Correct Answer
(C) They grow aerobically and breakdown cellulose- rich food.
Solution & Explanation
Answer: (C) They grow aerobically and breakdown cellulose-rich food. Solution: Methanogens are strictly anaerobic archaebacteria; they cannot grow aerobically, so statement C is the incorrect one. They do occur in the rumen/excreta of cattle, produce methane gas, and are used to make biogas — all of which are correct statements. NCERT Reference: NCERT Class XI, Biological Classification, p.13, lines 15-18 — "Methanogens are present in the gut of several ruminant animals such as cows and buffaloes"
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