Electrons transferred from NADH to the electron transport chain result in more ATP production than electrons transferred from FADH2 to the electron transport chain because the transfer of electrons from NADH to RC I is more efficient than the transfer of electrons from FADH2 to RC II.
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Step 1: The transfer of electrons from NADH to RC I is more efficient than the transfer of electrons from FADH2 to RC II. Show more…
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In the electron transport chain, the amount of ATP generated by electrons from an NADH molecule is more than the amount of ATP generated by electrons from an FADH2 molecule because: There is more NADH than FADH2 made for every glucose molecule that enters cellular respiration. One NADH contributes two electrons whereas one FADH2 contributes one electron to the electron transport chain. With NADH, the final electron acceptor is complex I whereas with FADH2, the final electron acceptor is complex II. More protons are pumped across the inner mitochondrial membrane when NADH is the electron donor than when FADH2 is the electron donor. More H2O is produced when NADH is the electron donor than when FADH2 is the electron donor.
Adi S.
NADH and FADH2 are both electron carriers that donate their electrons to the electron transport chain. The electrons ultimately reduce O2 to water in the final step of electron transport. However, the amount of ATP made by electrons from an NADH molecule is greater than the amount made by electrons from an FADH2 molecule. Why is more ATP made per molecule of NADH than per molecule of FADH2?
Electrons from NADH pump more protons as a consequence of reaction with oxygen than do the electrons from FADH2. Calculate the energy released by the reduction of O2 with FADH2.
Sri K.
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