AIIMS 2019 Botany Biogas Production MCQ Question
Which of the following is correct about biogas –
Methane gas is produced along with ethyl alcohol by methanogen.
Methanogens acts on cellulose and release biogas
Biogas is produced by thunder and lightening
Maximum gas found in biogas is CO₂
Correct Answer
Detailed Explanation
Option C is incorrect; biogas is not produced by thunder and lightning. Instead, biogas is primarily generated through anaerobic digestion by microorganisms, particularly methanogens, which break down organic matter in the absence of oxygen, resulting in methane (CH₄) and carbon dioxide (CO₂).
Option A is incorrect because methanogens primarily produce methane, not ethyl alcohol. Option B is misleading as methanogens do not act directly on cellulose; rather, they work on the products of cellulose degradation by other microorganisms. Option D is also incorrect; while CO₂ is a component of biogas, methane (CH₄) is the predominant gas, typically making up 50-75% of biogas composition.
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