O_2 maintains the operation of the Krebs cycl | vedclass

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(D) The Krebs cycle (or $TCA$ cycle) does not directly use $O_2$. However,it requires $NAD^+$ and $FAD$ as electron carriers to proceed. These carrier

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By regenerating $NAD^+$ and $FAD$

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(D) The Krebs cycle (or $TCA$ cycle) does not directly use $O_2$. However,it requires $NAD^+$ and $FAD$ as electron carriers to proceed. These carriers are reduced to $NADH$ and $FADH_2$ during the cycle. For the cycle to continue,$NAD^+$ and $FAD$ must be regenerated from $NADH$ and $FADH_2$ via the Electron Transport System $(ETS)$. The $ETS$ requires $O_2$ as the final electron acceptor to function. Therefore,$O_2$ indirectly maintains the Krebs cycle by allowing the regeneration of $NAD^+$ and $FAD$.

$O_2$ maintains the operation of the Krebs cycle by:

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