Multiple Choice
In redox reactions, what role does NAD+ play?
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
In the electron transport chain (ETC), what is the final electron acceptor?
A
NAD+
B
FAD
C
Oxygen
D
Water
Verified step by step guidance1
Understand the context: The electron transport chain (ETC) is a series of complexes that transfer electrons from electron donors to electron acceptors via redox reactions, and couples this electron transfer with the transfer of protons (H+ ions) across a membrane.
Identify the role of electron acceptors: In the ETC, electrons are passed through a series of proteins and coenzymes. The final electron acceptor is the molecule that receives the electrons at the end of the chain.
Consider the options: NAD+ and FAD are electron carriers that donate electrons to the ETC, but they are not the final electron acceptors. Water is a product of the ETC, not an electron acceptor.
Recognize the correct final electron acceptor: Oxygen (O2) is the final electron acceptor in the electron transport chain. It combines with electrons and protons to form water (H2O).
Summarize the process: The ETC culminates in the reduction of oxygen to water, which is essential for the continuation of the chain and the production of ATP through oxidative phosphorylation.
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