A) Viruses possess their own metabolic system.
B) Viruses contain either DNA or RNA.
C) Viruses are facultative parasites.
D) Viruses are readily killed by antibiotics.
Correct Answer: B
Solution :
Metha no bacillus (methanogen) occurs in marshes and also in dung. It produces \[C{{H}_{4}}\] gas under anaerobic condition and is utilized in gobar gas plant.
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