Chapter 12. The Electron-Transport Chain and Generation of the Proton-Motive Force

Animation Activities

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Animation Activity 12-22: The Electron-Transport Chain and Generation of the Proton-Motive Force

1.

Proton-motive force is used to power ATP synthesis by:

mitochondria only.

mitochondria and chloroplasts.

mitochondria, chloroplasts, and bacteria.

mitochondria, chloroplasts, bacteria, and glycolysis.

None of the above

Correct.

Incorrect.

Try Again.

2.

The proton-motive force generated by electron transport equals:

the proton concentration gradient.

the number of protons associated with cytochrome c.

the difference between the proton concentration gradient and the electric potential across the membrane.

the sum of the proton concentration gradient and the electric potential across the membrane.

None of the above

Correct.

Incorrect.

Try Again.

3.

Which of the following about the mitochondrial electron-transport system is false?

NADH donates electrons to Complex I.

CoQH₂ transports electrons from Complex I to Complex III.

Cytochrome c transports electrons through the inner membrane space from Complex III to Complex IV.

Complex IV donates electrons to O₂ to form H₂O.

All of the above are true.

Correct.

Incorrect.

Try Again.

4.

Electrons moving through mitochondrial electron-transport complexes:

eventually are donated to H₂O as the strongest electron acceptor.

are transferred from one complex to another having a weaker tendency to accept electrons.

are donated by O₂.

are transferred from complex to complex by coupled oxidation-reduction reactions.

All of the above

Correct.

Incorrect.

Try Again.

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Chapter 12. The Electron-Transport Chain and Generation of the Proton-Motive Force

Introduction

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