Multiple Choice
In the context of redox reactions, does the electron transport chain require oxygen to function?
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6. Chemical Quantities & Aqueous Reactions
Redox Reactions
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which electron carrier delivers electrons to the electron transport chain in redox reactions?
A
NADH
B
ATP
C
CO2
D
FAD
Verified step by step guidance1
Identify the role of electron carriers in cellular respiration, specifically in the electron transport chain (ETC). Electron carriers are molecules that transport electrons during cellular respiration.
Understand that NADH and FADH2 are the primary electron carriers that deliver electrons to the electron transport chain. These molecules are reduced forms of NAD+ and FAD, respectively.
Recall that NADH is produced during glycolysis and the Krebs cycle, and it carries electrons to the electron transport chain, where it is oxidized back to NAD+.
Recognize that FADH2 is another electron carrier that is produced during the Krebs cycle and also delivers electrons to the electron transport chain, where it is oxidized back to FAD.
Conclude that among the given options, NADH and FAD are the electron carriers that deliver electrons to the electron transport chain, with NADH being the correct answer as it is explicitly listed as an option.
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