The correct sequence of flow of electrons downhill in the mitochondrial electron transport chain would be:
1. ubiquinone, cytochromes, FMN, Fe-S
2. cytochromes, FMN, ubiquinone, Fe-S
3. Fe-S, FMN, cytochromes, ubiquinone
4. FMN, Fe-S, ubiquinone, cytochromes

Subtopic:  ETS |
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Electron is donated to the mitochondrial ETC at the lowest energy level by:

1. Glucose 2. NADH
3. ATP 4. FADH2
Subtopic:  ETS |

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The source of oxygen for the synthesis of water in oxidative phosphorylation is:
1. carbon dioxide
2. glucose
3. molecular oxygen
4. pyruvate

Subtopic:  Oxidative Phosphorylation |
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When electron pass downhill in the ETC, the energy released is used to pump protons into:
1. matrix of mitochondria
2. cytosol
3. mitochondrial inner membrane
4. mitochondrial intermembrane space

Subtopic:  ETS |
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ATP synthesis during oxidative phosphorylation in mitochondria is directly driven by:
1. oxidation of glucose.
2. electron transport downhill in the ETC.
3. terminal transfer of electrons to oxygen.
4. chemiosmosis.

Subtopic:  ETS |
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ATP synthase is located in the mitochondrial:

1. matrix 2. electron transport chain
3. outer membrane 4. inner membrane
Subtopic:  ETS |
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Isolated inner membrane of mitochondria can carry out:
1. the citric acid cycle
2. oxidative phosphorylation
3. glycolysis and fermentation
4. reduction of NAD+

Subtopic:  ETS |
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The number of oxygen molecules required each time a molecule of glucose is completely oxidized via aerobic respiration is:

1. 1 2. 2
3. 6 4. 12
Subtopic:  Introduction |
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Let us say there are 30 NADH and 12 FADH2 in a mitochondrion. What is the maximum number of ATP generated if all dinucleotides are used in chemiosmosis?

1. 42 2. 84
3. 114 4. 142
Subtopic:  Aerobic Respiration |
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Identify the incorrectly matched pair:

Component of ETC Name
1. Complex I NADH dehydrogenase
2. Complex II Succinate dehydrogenase
3. Complex III Cytochrome b6f complex
4. Complex IV Cytochrome c oxidase
Subtopic:  ETS |
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