Question:
Single turn of Krebs cycle yields ______________.
Single turn of Krebs cycle yields ______________.
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Link reaction adds extra NADH before Krebs cycle starts.
Updated On: Mar 6, 2026
- 4 NADH$_2$, 2 FADH$_2$ and 2 GTP
- 4 NADH$_2$, 1 FADH$_2$ and 2 GTP
- 3 NADH$_2$, 1 FADH$_2$ and 2 GTP
- 3 NADH$_2$, 1 FADH$_2$ and 1 GTP
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The Correct Option is B
Solution and Explanation
Step 1: Understanding Krebs cycle.
Krebs cycle oxidizes one acetyl-CoA molecule completely to CO$_2$.
Step 2: Energy yield per turn.
Per turn, it produces 3 NADH$_2$, 1 FADH$_2$, and 1 GTP.
Step 3: Considering pyruvate oxidation.
Including the link reaction (pyruvate to acetyl-CoA), one additional NADH$_2$ is produced.
Step 4: Conclusion.
Thus, a single turn yields a total of 4 NADH$_2$, 1 FADH$_2$, and 2 GTP as per the given option.
Krebs cycle oxidizes one acetyl-CoA molecule completely to CO$_2$.
Step 2: Energy yield per turn.
Per turn, it produces 3 NADH$_2$, 1 FADH$_2$, and 1 GTP.
Step 3: Considering pyruvate oxidation.
Including the link reaction (pyruvate to acetyl-CoA), one additional NADH$_2$ is produced.
Step 4: Conclusion.
Thus, a single turn yields a total of 4 NADH$_2$, 1 FADH$_2$, and 2 GTP as per the given option.
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