Cliff AP answers

[aznnytezx]

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Can anyone explain #6 on Cliff AP, on page 51? I Thought the answer was FADH2, because I Know Pathway C is E.T.C.

 

[KN19]

It cant be FADH2 because FADH2 would be coming from Pathway B ( so it would be an arrow coming from that box specifically). It makes sense for arrow 9 to be O2 because it is the final electron acceptor in the ETC. According to the answer key, it could also have been ADP, but ADP is not a choice so we don't have to worry about that.