Question

part a (1 of 4) - the role of o₂ in electron transport in mitochondrial electron transport, what is the direct role of o₂? to provide the driving force for the synthesis of atp from adp and p₁? to oxidize nadh and fadh₂ from glycolysis, acetyl coa formation, and the citric acid cycle to function as the final electron acceptor in the electron transport chain to provide the driving force for the production of a proton gradient

Explanation:

In the electron transport chain (ETC) of mitochondria, electrons are passed through a series of carriers. At the end of the ETC, \(O_2\) accepts electrons (along with protons \(H^+\)) to form water (\(H_2O\)). This makes \(O_2\) the final electron - acceptor.

• The driving force for ATP synthesis from ADP and \(P_i\) is the proton - motive force (not directly \(O_2\)).
• \(NADH\) and \(FADH_2\) are oxidized by earlier electron - transport chain complexes (not directly by \(O_2\)).
• The proton gradient is produced by the pumping of protons across the inner mitochondrial membrane by electron - transport chain complexes (not directly by \(O_2\) providing the driving force for its production).

Answer:

to function as the final electron acceptor in the electron transport chain