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Electron Transport Chains (ETC)

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Questions and Answers

Which of the following best describes an electron transport chain (ETC)?

A series of protein complexes that transfer electrons and protons simultaneously (correct)
A series of protein complexes that transfer electrons via redox reactions
A series of protein complexes that transfer protons across a membrane
A series of protein complexes that transfer electrons and protons separately

What is the role of NADH and FADH2 in the electron transport chain?

They are electron donors (correct)
They are mobile electron carriers
They are electron acceptors
They are large enzyme complexes

Where are many of the enzymes in the electron transport chain located?

Embedded within the membrane (correct)
In the cytoplasm
In the nucleus
In the mitochondrial matrix

What is the main purpose of the electron transport chain?

To create an electrochemical proton gradient (B) Signup and view all the answers

What is the final electron acceptor in aerobic respiration?

Molecular oxygen (A) Signup and view all the answers

Which of the following is NOT a function of the electron transport chain?

Termination of electron flow with molecular oxygen (C) Signup and view all the answers

What is the role of the electron transport chain in aerobic respiration?

To generate a proton gradient across a membrane (B) Signup and view all the answers

Which of the following is true about the electron transport chain?

It involves four multi-subunit large enzymes complexes and two mobile electron carriers (A) Signup and view all the answers

What happens to the energy from the redox reactions in the electron transport chain?

It is used to generate a proton gradient (D) Signup and view all the answers

In anaerobic respiration, what can be used as an electron acceptor in the electron transport chain?

Sulfate (D) Signup and view all the answers