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Question

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


A
4
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B
6
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C
2
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D
1
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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:
  1. Isocitrate to alpha-ketoglutarate (NADH is formed)
  2. alpha-ketoglutarate to succinyl co-A (NADH is formed)
  3. Succinate to Fumarate (FADH$$_{2}$$ is formed)
  4. Malate to oxaloacetate (NADH is formed)
Hence, the correct answer is '4'.

Biology

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