Q. No.A five carbon amino acid can be formed by which of the following intermediates of Krebs cycle?
1.
succinate
2.
malate
3.
citrate
4.
α-ketoglutarate
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The number of molecules of carbon dioxide produced by three turns of the Krebs cycle would be:
| 1. | 3 | 2. | 6 |
| 3. | 12 | 4. | 18 |
What is the total number of NADH and molecules produced for each molecule of glucose metabolized by glycolysis and the citric acid cycle?
| 1. | 5 | 2. | 6 |
| 3. | 10 | 4. | 12 |
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The correct sequence of electron flow during aerobic respiration would be:
1. food → Krebs cycle → ATP → NAD+
2. food → NADH → electron transport chain → oxygen
3. glucose → pyruvate → ATP → oxygen
4. glucose → ATP → electron transport chain → NADH
The components of the mitochondrial electron transport chain are located:
1. in mitochondrial matrix
2. in outer mitochondrial membrane
3. in inner mitochondrial membrane
4. in intermembrane space
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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
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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 |
The source of oxygen for the synthesis of water in oxidative phosphorylation is:
1. carbon dioxide
2. glucose
3. molecular oxygen
4. pyruvate
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
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. |
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