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Which best describes the consumption of glucose in the Krebs cycle?

A. The Krebs cycle runs four times for each molecule of glucose consumed.
B. The Krebs cycle runs twice for each molecule of glucose consumed.
C. The Krebs cycle consumes two molecules of glucose in each cycle.
D. The Krebs cycle consumes one molecule of glucose in each cycle.



Answer :

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Final answer:

The Krebs cycle runs twice for each molecule of glucose consumed, storing energy in various carrier molecules while breaking down glucose.


Explanation:

The Krebs cycle runs twice for each molecule of glucose consumed. Each turn of the cycle (two for each glucose) stores energy in 3 NADH+H, one FADH, and one ATP. After the second turn through the cycle, the original glucose molecule has been completely broken down, with all six of its carbon atoms combining with oxygen to form carbon dioxide.


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