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Where does the electron transport chain get the high-energy electrons that are passed down the chain?
The high-energy electrons in the electron transport chain are derived from molecules like NADH and FADH2, which are generated during cellular respiration in processes like glycolysis and the citric acid cycle. These molecules donate their electrons to the chain, where they are passed down through a series of protein complexes to generate ATP.
Which group of iron-sulfur proteins in the electron transport chain accepts electrons from FADH2?
The iron-sulfur proteins in the electron transport chain that accept electrons from FADH2 are known as Complex II or succinate dehydrogenase.
During aerobic respiration what directly donates electrons to the electron transport chain at the lowest energy level?
NADH and FADH2 donate electrons to the electron transport chain at the lowest energy level during aerobic respiration. These molecules are produced during earlier stages of cellular respiration (glycolysis and the citric acid cycle) and deliver high-energy electrons to the electron transport chain for ATP production.
How many electrons can the inner shell of an atom contain?
The innermost shell of an atom can contain a maximum of 2 electrons.
What electron carriers are produced in the Krebs cycle?
There are two electron carriers produced in the citric acid (Krebs Cycle). The first is NAD+ or NADH in its reduced form. The other is FAD+ which becomes FADH2 after being reduced. One turn of the citric acid cycle produces 1 and 3 molecules of FADH2 and NADH respectively.
