a1201_electron_transport

Question 1 of 4

Animation Assessment

Question

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

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Question

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

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Question

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 O<sub>2</sub> to form H<sub>2</sub>O.

All are true.

Correct.

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Question

Electrons moving through mitochondrial electron transport complexes:

Lose energy that is used to transport protons from the intermembrane space to the matrix

Gain energy that is used to transport protons from the matrix to the intermembrane space

Retain the same level of energy, because electrons can neither gain nor lose energy, but the electrons cause conformational changes in the complexes that transport protons from the intermembrane space to the matrix.

Lose energy that is used to transport protons from the matrix to the intermembrane space

Correct.

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Incorrect.

Chapter 12. Electron Transport

Animation Assessment

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