Feedback for Multiple Choice Quiz 30

  1. In fact, a gain of electrons (reduction) always accompanies a loss of electrons (oxidation). The term, "redox reaction" captures all of these features.

  2. Fe3+ is part of a redox couple (with Fe2+) in several reactions, however, it is acted upon by the other agents listed.

  3. The yield is 3 ATP/NADH and 2 ATP/FADH2. Therefore, there are ___ NADH and ___ FADH2 produced per acetyl-CoA. Fill-in the blanks, knowing the correct answer, or look it up.

  4. See section 20.2.

  5. The inner mitochondrial membrane (enclosing the matrix compartment) is the energy-coupling membrane in eukaryotes. What is the energy-coupling membrane in prokaryotes?

  6. Fig. 20.7 is a good summary of the proton pumping sites.

  7. Again, Fig. 20.7 is a good summary of the roles played by all of the electron carriers listed in this question.

  8. Quite a machine!
    How can it sequentially collect two pairs of electrons and then dump all of them onto molecular O2 to form water? -- Answer as yet unknown, but it should be interesting when we find out.
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