Which of the Following Coenzymes is NOT Specific for Methanogenesis

Question

Which of the following coenzymes is NOT specific for methanogenesis? A) methanofuran (MFR) B) tetrahydromethanopterin (H4MPT) C) cofactor F420(F420) D) nicotinamide adenine dinucleotide (NAD⁺) E) coenzyme M (CoM)

Accepted Answer

Nicotinamide adenine dinucleotide (NAD+) is a coenzyme that is involved in a wide range of cellular metabolic processes, not exclusively in methanogenesis. The other coenzymes listed (MFR, H₄MPT, F₄₂₀, CoM) are all specific to methanogenesis.