Question

For each glucose that enters glycolysis, _____ NADH enter the electron transport chain. For each glucose that enters glycolysis, _____ NADH enter the electron transport chain. 0 4 2 6 10

Answer 1

For each glucose that enters glycolysis, 10 NADH enter the electron transport chain.

• NADH and FADH, which function as electron transporters as they move through the inner membrane region, are involved in the processes of the electron transport chain.
• Electrons are transferred from NADH to the electron transport chain at complex I, where they transit through the other complexes. In this mechanism, NADH is oxidized to NAD.
• The four protein complexes of the electron transport chain use this energy to oxidize NADH and FADH2 (ETC).
• Each of the three previous stages of respiration—glycolysis, the conversion of pyruvate into acetyl-CoA, and the citric acid cycle—contributes two of the ten NADH molecules that enter the electron transport.
• The citric acid cycle contributes six of the molecules. The citric acid cycle is where the two FADH2 come from.

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