Cellular Respiration and Electron Transport

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The synthesis of ATP in mitochondria is driven by a proton or pH gradient.
True
False
Fats and amino acids are better sources of energy than sugars, since their catabolism takes place directly in the mitochondria.
True
False
Reduction Potentials
The complete reduction of one molecule of oxygen gas requires how many electrons?
one
two
four
eight

Organization of Electron Transport Complexes
Complex IV of the electron transport chain oxidizes _______, reduces _______, and ______ protons in the process.
coenzyme Qcytochrome cpumps
cytochrome ccoenzyme Qpumps
cytochrome cO2doesn't pump
cytochrome cO2pumps
Complex III of the electron transport chain oxidizes _______, reduces _______, and ______ protons in the process.
coenzyme Qcytochrome cpumps
coenzyme Qcytochrome cdoesn't pump
cytochrome ccoenzyme Qpumps
cytochrome ccoenzyme Qdoesn't pump
The final reduced species in the electron transport chain is
O2
H2O
cytochrome c
coenzyme Q
Which of the following are located in the inner mitochondrial membrane?
all the components of the citric acid cycle and the electron transport chain
all the components of the citric acid cycle but none of the components of the electron transport chain
all the components of the electron transport chain but none of the components of the citric acid cycle
all the components of the electron transport chain and one of the components of the citric acid cycle, namely the succinate dehydrogenase complex Which complex of the electron transport chain does NOT contain an iron-sulfur cluster?

Complex I
Complex II
Complex III
Complex IV
Another name for Complex II in the electron transport chain is
cytochrome c oxidase
NADH-CoQ oxidoreductase
cytochrome bc1 complex
succinate-CoQ oxidoreductase
The cytochrome that passes electrons directly to oxygen is
the cytochrome a/a3 complex
cytochrome b
cytochrome c
cytochrome c1
A cytochrome that can move freely in the mitochondrial membrane is
cytochrome a
cytochrome b
cytochrome c
cytochrome c1
Most of the reactions of electron transport in the mitochondria occur here:
The outer membrane
The inner membrane.
The mitochondrial matrix.
The intermembrane space.
It is not known where electron transport takes place.
Electron flow in the mitochondria follows this pathway.
NADH FMN Coenzyme Q Cyt A Cyt B Cyt C O2
NADH FMN Cyt B Coenzyme Q Cyt C Cyt A O2
FMNH2 NAD Coenzyme Q Cyt B Cyt C Cyt A O2
NADH FMN Coenzyme Q Cyt B Cyt C Cyt A O2
NADH FMN Cyt B Cyt C Coenzyme Q Cyt A O2
Electron flow in the mitochondria follows this pathway.
Complex I complex II complex III complex IV.
Complex IV complex III complex II complex I.
Complex I complex III complex IV.
Complex II complex III complex IV.
Both complex I III IV and complex II III IV.
Another name for Complex I in the mitochondria is:
Cytochrome C oxidase.
NADH-CoQ oxidoreductase.
succinate-CoQ reductase.
Cytochrome A oxidase.
Cytochrome bc1 complex.
Another name for Complex III in the mitochondria is:
Cytochrome C oxidase.
NADH-CoQ reductase.
succinate-CoQ reductase.
Cytochrome A oxidase.
Cytochrome BC1 complex.
Succinate dehydrogenase is located in this complex.
Complex I.
Complex II.
Complex III.
Complex IV.
It is not known where succinate dehydrogenase is located.
Cytochrome oxidase is located in this complex
Complex I.
Complex II.
Complex III.
Complex IV.
It is not known where cytochrome oxidase is located.
The only complex which actually uses molecular oxygen is:
Complex I.
Complex II.
Complex III.
Complex IV.
It is not known where oxygen is used.
All of these elements act as intermediate electron carriers in the mitochodria.
Iron.
Copper.
Sulfur.
Both iron and copper.
All three are intermediate electron carriers.
The only reaction which actually uses...
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