Question

Obligate anaerobes require

• A. Oxygen
• B. carbon dioxide
• C. Methane
• D. No oxygen

Answer 1

The correct option is D No oxygen

Anaerobes are the organism which respires in the absence of oxygen. Obligate anaerobes are those microorganisms that cannot survive in presence of oxygen. They use fermentation to produce the energy required for the metabolic process. Oxygen is harmful to these organisms. The absence of the enzymes superoxide dismutase and catalase causes death in presence of oxygen. For example, Pseudomonas putida.

So, the correct answer is option D.