Feedback for Multiple Choice Quiz 29

  1. Think of it this way: All of the enzymes that generate the NADH used for ATP synthesis are in a single compartment enclosed by the coupling membrane, i.e. the inner mitochondrial membrane.
  2. The three incorrect choices are all direct or indirect products of anaerobic glycolysis.
  3. Oxidative phosphorylation yields far more ATP than any of the other processes listed. Do you know how much more? See Campbell, Table 20.3 for the accounting.

  4. If the energy is not captured productively (ATP), it must be dissipated as heat. Heat is "the last stop" for all forms of energy that are not used for something else. (Full disclosure: some of the energy is captured productively in the form of the membrane potential; it is then used to pump ions, etc.)
  5. This is a really important point in metabolism and far too simple a question for an exam!
  6. This is an oxidation, therefore NADH is produced by reduction of NAD. It occurs only twice in the TCA cycle. The conversion of pyruvate to acetyl-CoA occurs between glycolysis and the TCA cycle.
  7. The TCA cycle is a central component of metabolism, participating in all of the above.
  All of the correct answers have a green check mark.
  Incorrect answers have the "red-lit" button next to your choice.