Quiz 13 Review Flashcards
In which cellular organelle does the electron transport system function?
Mitochondria
In which part of this organelle will the electron transport system be active?
inner mitochondrial membrane
How many complexes occur in the electron transport system?
Three different complexes
Complex I, Complex II, Complex III
In which complex of the electron transport system does NADH interact?
NADH transfers its electrons and H+ through each complex (I,II, III).
In which complex of the electron transport system does FADH2 interact?
FADH transfer its electrons and H+ through the last two complexes. Complex II, and Complex III. NOT INVOLVED IN COMPLEX I.
What molecule serves as the terminal electron acceptor of the electron transport system?
Oxygen
Each time NADH, FADH2, and oxygen interact with the electron transport system, what gets “pumped” from one part of the mitochondria to another part of the mitochondria?
Hydrogen Ions (H+)
From which part of the mitochondria do these tings get pumped from and where are they pumped to?
During electron transport, H+ are taken up and accumulate in the inter-membrane. Once the concentration of H+ is greater than the mitochondria matrix they are pumped from the inter-membrane to the mitochondrial matrix.
These things that are getting pumped are associated with ATP production. What do these things do that contributes to ATP production?
Flow of ions causes the generation of electrical energy which is used to drive the phosphorylation of ADP to ATP.
ATP synthase provides the channel for flow of H+, and the enzyme needed to catalyze phosphorylation
How many ATP can be produced by the interaction of one NADH with the electron transport system?
3 ATP are possible
How many ATP can be produced by the interaction of one FADH2 with the electron transport system?
2 ATP are possible
There is an enzyme involved in ATP production associated with the electron transport system. What is the name of this enzyme?
ATP Synthetase
How many ATP can be produced by the complete oxidation of one glucose molecule?
total 36 ATP per glucose molecule
Even though one NADH is produced during glycolysis, this NADH is not going to result in production of the same number of ATP that NADH that occurs from the TCA cycle will. Why is this?
Because NADH does not freely move from the cytosol to the mitochondria
In addition to the NADH that occurs from glycolysis, what general reactions or cycles will result in production of the remaining NADH associated withthe complete oxidation of glucose?
TCA cycle
