In Kreb's cycle, how many oxidation (dehydrogenation) occur?

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Solution

The correct option is A 4
In Kreb's cycle the oxidation or dehydrogenation reaction occurs 4 times as follows:
Isocitrate to alpha-ketoglutarate (NADH is formed)
alpha-ketoglutarate to succinyl co-A (NADH is formed)
Succinate to Fumarate (FADH $_{2}$ is formed)
Malate to oxaloacetate (NADH is formed)
Hence, the correct answer is '4'.

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