The following reaction is part of the electron transport chain. Complete the reaction and identify which species is reduced. The abbreviation Q represents coenzyme Q. Use the appropriate abbreviation for the product. FADH2+Q→
The reactant that is reduced is:

The reactant that is reduced is Q.

Explanation:

The complete equation for the reaction is such that:

Two molecules of H atom is lost from and the H atoms are gained by the coenzyme Q. Consequently,   becomes FAD while Q becomes .

From the definition of oxidation as loss of hydrogen and reduction as the addition of hydrogen, it can be concluded that the FADH2 that lost hydrogen is a reactant that is oxidized while the coenzyme Q that gained hydrogen is a reactant that is reduced in the reaction.

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