Oxidation of succinate to fumarate in the Kreb's cycle is due to

Loss of electron from it

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Removal of hydrogen from it

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Addition of oxygen to it

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None of the above

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Solution

The correct option is C Removal of hydrogen from it
Succinate dehydrogenase enzyme catalyzes the oxidation of succinate by removal of its two hydrogen atoms and forms fumarate. The removed hydrogen atoms reduce the FAD into $F A D H_{2}$ that enters mitochondrial electron transport chain. Thus, the correct answer is option B.

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F A D^{+}

F A D H_{2}

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