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Which of the following is true with respect to the availability of electrons from other steps of the Krebs cycle?

Which of the following is true with respect to the availability of electrons from other steps of the Krebs cycle? Correct Answer Electrons from other steps could also reduce DPIP, but the substrates for these steps are consumed before succinate is added.

B. Pyruvate, the product of glycolysis, is the initial substrate for the Krebs cycle. All of the steps of the Krebs cycle that normally reduce NAD+ to NADH can also reduce DPIP if NAD+ and pyruvate are continuously provided. However, only succinate is provided, so only succinate can contribute electrons (normally for the reduction of FAD to FADH2).

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