This quiz is designed to help test your knowledge and understanding of the basic concepts of the Electron Transport Chain and Oxidative Phosphorylation.

Each of our quizzes contains randomised question, so each attempt will be different! After you submit the answers for each question, hints and feedback are given to explain where you might have gone wrong or why you were right. Take the quiz now and see how much of an expert you are!

(For calculations you can assume that approximately 3.0 ATP are produced per NADH and 2.0 ATP per FADH2)

5 Sample Questions

In eukaryotic cells, most of the ATP derived from the metabolism of glucose is produced by:

  • A. Glycolysis
  • B. Gluconeogenesis
  • C. The TCA cycle
  • D. The electron transport chain

How many ATP molecules are formed as a result of each NADH that enters the electron transport chain?

  • A. One
  • B. Two
  • C. Three
  • D. None

How many ATP molecules are produced for each FADH2 that enters the electron transport chain:

  • A. One
  • B. Two
  • C. Three
  • D. None

In the electron transport chain, which respiratory complex is not involved in the pumping of protons?

  • A. Complex I
  • B. Complex II
  • C. Complex III
  • D. Complex IV

The flow of protons during oxidative phosphorylation is ​from the mitochondrial matrix to the cytoplasm.

  • A. True
  • B. False

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