Q. No.In the mitochondrial electron transport system, the term Complex III refers to:
1. NADH dehydrogenase
2. Cytochrome c
3. FADH2
4. Cytochrome bc1 complex
1. NADH dehydrogenase
2. Cytochrome c
3. FADH2
4. Cytochrome bc1 complex
For each ATP produced, how many H passes through F0 from the intermembrane space to the matrix down the electrochemical proton gradient?
1. 1
2. 2
3. 3
4. 4
If fatty acids were to be respired, they would first be degraded to:
1. Glucose-6 phosphate
2. Pyruvate
3. Acetyl-CoA
4. Alpha ketoglutarate
In the absence of oxygen, the primary purpose of fermentation is to:
| 1. | produce amino acids for protein synthesis |
| 2. | generate a proton gradient for ATP synthesis |
| 3. | oxidize glucose to generate reduce electron carriers |
| 4. | regenerate NAD+ from NADH allowing glycolysis to continue |
During glycolysis, when glucose is catabolized to pyruvate, most of the energy of glucose is
| 1. | transferred to ADP, forming ATP. |
| 2. | transferred directly to ATP. |
| 3. | retained in the pyruvate. |
| 4. | stored in the NADH produced. |
ATP production during cellular respiration is controlled by allosteric inhibition. The control is the allosteric inhibition by ATP and citric acid of the enzyme that facilitates the formation of:
| 1. | Glucose 6- phosphate from glucose |
| 2. | Fructose 1,6- bisphosphate from Fructose 6 - phosphate |
| 3. | Acetyl CoA from Pyruvic acid |
| 4. | Citric acid from Acetyl CoA and Oxaloacetic acid |
When proteins are used as respiratory substrates, the respiratory quotient would be about:
1. 1.2
2. 1.0
3. 0.9
4. 0.7
The mitochondrial electron transport chain is located in:
1. Outer membrane
2. Inner membrane
3. Inter membrane space
4. Matrix
The useful purpose served by lactate fermentation is:
| 1. | Make lactose available for gluconeogenesis |
| 2. | Production of additional ATP in anaerobic conditions |
| 3. | Regeneration of NAD+ |
| 4. | Increased availability of oxygen for the skeletal muscle |
The primary role of oxygen in cellular respiration is to:
| 1. | yield energy in the form of ATP as it is passed down the respiratory chain. |
| 2. | act as an acceptor for electrons and hydrogen, forming water |
| 3. | combine with carbon, forming CO2. |
| 4. | combine with lactate, forming pyruvate. |
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