Question 14 of 18 Sapling Learning The following reaction is part of the electro

Question

Question 14 of 18 Sapling Learning The following reaction is part of the electron transport chain. Complete the reaction and identify which abbreviation The abbreviation FMN represents flavin mononucleotide. Use the appropriate for the NADH H FMIN The reactant that is reduced is FMN a In complex Ill, electrons are transferred from coenzyme Q to cytochrome which contains iron. Determin the number on the right side of the reaction c, the superscript "x with the appropriate number. arrow. Replace QH, 2 cyt c Fe Q +2 cy clFe

Explanation / Answer

NADH + H + FMN leads to FMNH2 as

Since reduction in terms of chemistry is gaining of hydrogen the substance that is reduced here is FMN

FMN (like FAD) can accept 2 e- + 2 H+ to yield FMNH2

QH2 + 2Cyt c(Fe3+) leads to Q + 2Cyt c(Fe2+) + 2H+

QH2 + 2 cytochrome c (FeIII) + 2 H+in Q + 2 cytochrome c (FeII) + 4 H+out, (Murray)

Oxidation no of Fe is +2

Hence x = +2

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