| Coverage : The Aerobic Respiration Quiz tests your knowledge about glycolysis, the Krebs cycle, and aerobic electron transport systems. |
| 1. | In the cell, aerobic respiration (glycolysis + Krebs cycle) takes place: |
| a. | | Only in the cytoplasm |
| b. | | Only in the mitochondria |
| c. | | In both the cytoplasm and the mitochondria |
| d. | | In the cytoplasm, the mitochondria, and the ribosomes |
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| 2. | What are the net end-products from glycolysis fed into the Krebs cycle and electron transport systems (ETS)? |
| a. | | 2 NADPH |
| b. | | 2 NADH |
| c. | | 2 ATP |
| d. | | 2 Pyruvate |
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| 3. | How many more ATP are produced by electron transport phosphorylation (ETP) than by the Krebs Cycle for one glucose molecule? |
| a. | | 30 -- ETP yields 32 ATP compared to 2 ATP from the Krebs Cycle |
| b. | | 30 -- ETP yields 34 ATP compared to 4 ATP from the Krebs Cycle |
| c. | | 32 -- ETP yields 36 ATP compared to 4 ATP from the Krebs Cycle |
| d. | | 32 -- ETP yields 38 ATP compared to 6 ATP from the Krebs Cycle |
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| 4. | Why is oxygen necessary for electron transport phosphorylation to occur in the mitochondria? |
| a. | | It combines with NADH to burn |
| b. | | It adds energy to the start of the reaction |
| c. | | It picks up the hydrogen at the end of the chain to form water |
| d. | | Without the removal of the electrons at the end of the chain it the chain would stop |
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| 5. | In the aerobic respiration equation C(6)H(12)O(6) + 6 O(2) --> 6 CO2 + ?, for what does the question mark stand? |
| a. | | H(2)O |
| b. | | 2 O(2) |
| c. | | 6 H(2)O |
| d. | | 6 O(2) |
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| 6. | Why is it that glycolysis produces 4 substrate-level phosphorylations, but only produces 2 net ATP? |
| a. | | Pyruvate requires 2 ATP to phosphorylate it before the Krebs cycle can begin |
| b. | | An input of 2 ATP are required to being glycolysis |
| c. | | Two ATP are needed to replace 2 NADH used to start glycolysis |
| d. | | Only 2 of the 4 ATP are in usable forms |
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| 7. | The main aerobic energy-releasing pathways begin in the cytoplasm. |
| a. | | True |
| b. | | False |
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| 8. | What steps are necessary to make pyruvate ready for entry into the Krebs cycle? |
| a. | | Coenzyme A must be added |
| b. | | It must be reduced by one carbon unit |
| c. | | It must be phosphorylated |
| d. | | It must by oxidized by NAD+ |
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| 9. | Once glucose has been broken down into pyruvate through glycolysis, it must continue into the Krebs cycle for energy to be harvested. |
| a. | | True |
| b. | | False |
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| 10. | The intermediate at the point of entry for the Krebs cycle involves: |
| a. | | The transfer of a 2-carbon group onto a 4-carbon group forming citrate |
| b. | | The transfer of a 3-carbon group onto a 3-carbon group forming citrate |
| c. | | The transfer of a 2-carbon group onto a 4-carbon group forming succinyl-CoA |
| d. | | The transfer of a 2-carbon group onto a 3-carbon group forming alpha-ketoglutarate |
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| 11. | What are the redox and phosphorous transfer pairs involved in the Krebs cycle? |
| a. | | NAD+/NADH, FADP/FADPH2, ATP/ADP, GTP/GDP |
| b. | | NAD+/NADH, FAD/FADH2, ATP/ADP, CTP/CDP |
| c. | | NADP+/NADPH, FAD/FADH2, ATP/ADP, GTP/GDP |
| d. | | NAD+/NADH, FAD/FADH2, ATP/ADP, GTP/GDP |
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| 12. | One glucose molecule broken down aerobically using the Krebs cycle would typically yield as many ATP as how many glucose molecules by glycolysis alone? |
| a. | | As many as 9 depending on cellular conditions |
| b. | | As many as 18 depending on cellular conditions |
| c. | | As many as 36 depending on cellular conditions |
| d. | | As many as 54 depending on cellular conditions |
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