A) Name the membrane-bound enzyme that directly links the TCA cycle with the electron transport chain. Give its name in the TCA cycle and the electron transport chain. B) Name at least two other starting points for substrates used in the electron transport chain. C) Approximately how many protons are pumped for each of these electron transport chain starting points

A). succinate dehydrogenase

B). glycolysis, TCA cycle

C). 10 and 6 proton respectively

Explanation:

Electron transport chain or the ETC may be defined as a electron transporters which is embedded into the inner membrane of the mitochondria which shuttles the electrons from the NADH and the FADH2 to the molecular oxygen.

A). The membrane-bound enzyme which  directly links the TCA cycle with the electron transport chain is succinate dehydrogenase. It is called as the succinate-coenzyme Q reductase in the electron transport chain or the ETC.

B). The two other starting points for the substrates that is used in the electron transport chain are TCA cycle and the glycolysis.

C). For each of the NADH which enters the electron transport chain , there will be ten protons that is pumped into the IM space. And for the two FADH2, there will be six protons which is pumped into the IM space.

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