part 1. Protein component of the electron transport chain that undergoes redox b

Question

part 1. Protein component of the electron transport chain that undergoes redox by converting between Fe3+ and Fe2+ (There may be one or more correct answer):

a. FMN (also known as Complex 1) b.Quinone c.Glyoxylate Cycle d.Quinol e.Citric Acid Cycle f.FAD g.NADH h.Cytochrome

part 2. Uses pi bond (resonance structure) to stabilize the gain and loss of electrons (There may be one or more correct answer):

a. FMN (also known as Complex 1) b.Quinone c.Glyoxylate Cycle d.Quinol e.Citric Acid Cycle f.FAD g.NADH h.Cytochrome

part 3. Oxidizes FMNH2 and FADH2 by accepting electrons and carrying them to Complex III (There may be one or more correct answer):

a. FMN (also known as Complex 1) b.Quinone c.Glyoxylate Cycle d.Quinol e.Citric Acid Cycle f.FAD g.NADH h.Cytochrome

Explanation / Answer

Part 1. Cytochrome is the component that undergoes redox reaction by converting between fe3+ and fe2+.

Cytochrome contains a heme group made up of a porphyrin ring which contain an atom of iron. The heme iron of cytochromes changes its state back and forth between fe3+ and fe2+.

Part 2. The citric acid cycle uses pi bond resonance to stabilize gain and loss of electrons. Citric acid cycle brings substrate into close proximity, then orienting them and polarizing the bonds.

Part 3. Quinone oxidizes FMNH2 and FADH2 by accepting electrons and carrying them to comples III. Ubiquinone is ubiquitous in nature. There are three redox states of Ubiquinone.. fully oxidized, semiquinone and fully reduced. It is a carrier of hydrogen atoms i.e protons plus electrons.

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