Per turn of the Krebs cycle, which combination of products is produced?

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Multiple Choice

Per turn of the Krebs cycle, which combination of products is produced?

Explanation:
In one turn of the Krebs cycle, energy is captured by producing three NADH, one FADH2, and one GTP (which acts like ATP). This comes from three dehydrogenase steps that reduce NAD+ to NADH and FAD to FADH2, plus a substrate-level phosphorylation step where succinyl-CoA is converted to succinate yields GTP. Two CO2 molecules are released as waste, but aren’t part of the energy carrier tally. These carriers feed the electron transport chain to make ATP, while the GTP provides immediate cellular energy. So the per-turn products are one ATP (GTP), one FADH2, and three NADH.

In one turn of the Krebs cycle, energy is captured by producing three NADH, one FADH2, and one GTP (which acts like ATP). This comes from three dehydrogenase steps that reduce NAD+ to NADH and FAD to FADH2, plus a substrate-level phosphorylation step where succinyl-CoA is converted to succinate yields GTP. Two CO2 molecules are released as waste, but aren’t part of the energy carrier tally. These carriers feed the electron transport chain to make ATP, while the GTP provides immediate cellular energy. So the per-turn products are one ATP (GTP), one FADH2, and three NADH.

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