What is the role of FMN in complex I? A) Converts a two-electron transfer to a one-electron transfer. B) Converts a one-electron transfer to a two-electron transfer. C) Transports four H⁺across the membrane. D) None, there is no FMN in complex I.

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Quizplus · Accepted Answer

FMN (Flavin mononucleotide) in complex I of the electron transport chain acts as an initial electron acceptor from NADH, converting a two-electron transfer to a one-electron transfer, facilitating the transfer of electrons to the iron-sulfur clusters.

What Is the Role of FMN in Complex I