Please tell why my answerr was incorrect. The following reaction is part of the

Question

Please tell why my answerr was incorrect.

The following reaction is part of the electron transport chain. Complete the reaction and identify which jMap species is reduced. The abbreviation FMN represents flavin mononucleotide. Use the appropriate abbreviation for the product. NADH+ H+ + FMN rightarrow NAD + FMNH2 The reactant that is reduced is |FMN Incorrect. Consider the product that results from FMN gaining hydrogen. What results from NADH+H+ losing hydrogen? In complex III, electrons are transferred from coenzyme Q to cytochrome c, which contains iron. Determine the oxidation number for iron on the right side of the reaction arrow. Replace the superscript "x" with the appropriate oxidation number. QH_2 + 2 cyt c(Fe^3+) rightarrow Q + 2 cyt c[Fe^2+] + 2H^+

Explanation / Answer

the complete reaction is

the half reactions that takes place are

NADH + H+ ----> NAD+ + 2e- + 2H+

FMN + 2e- + 2H+ ---> FMNH2

and the overall reaction is given by

NADH + H+ + FMN ---> FMNH2 + NAD+

2)

the reaction is given by

QH2 + 2 ferricytochrome c -----> Q + 2 ferrocytochrome c + 2H+

here

QH2 ---> quinol

Q ---> quinone

now

in the right side of the reaction arrow

the iron compound is ferrocytochrome c

we know that

ferri represents Fe+3

and

ferro represents Fe+2

in this case

ferro is present on the right side of the reaction

so it is Fe+2

so

the oxidation number for iron on the right side is +2

and the reaction is

QH2 + 2cyt c (Fe+3) ---> Q + 2 cyt c (Fe+2) + 2H+

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