Question

Cytochrome c is an iron-containing enzyme found in the cells of all aerobic organisms. if cytochrome c is 0. 43e by mass, what is its minimum molecular weight?

Answer 1

Let the molar mass be =M.

If 0.43% Fe has molar mass=100 g.

Then, 56 g Fe has molar mass=100×56÷0.43 =13023.26=13Kg mol −1 .

Cytochromes are electron-transporting protein pigments concerned with cell respiration that contain an iron-containing molecule called heme, true to that of hemoglobin. When the iron of heme accepts an electron , it changes from the oxidized ferric (Fe III) state to the, reduced ferrous (Fe II) state. oxidation of cytochromes to molecular oxygen and their subsequent reduction by oxidizable substances in the cell is the main way in which atmospheric oxygen enters into the metabolism of the cell. About 90% of all oxygen consumed is mediated by the cytochromes.

To learn more about cytochromes , here

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