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| 1. |
The energy content of fatty acids is harvested in a cell through
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| 2. |
What is the purpose in having several steps in glycolysis or the Krebs cycle rather than a single step from glucose and oxygen to carbon dioxide and water?
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| 3. |
Which of the following is accomplished during the reactions of glycolysis?
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| 4. |
One of the purposes of the Krebs cycle is to
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| 5. |
Which of the following is true regarding ATP synthesis in prokaryotes?
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| 6. |
In the Buchner experiment, why did boiling of the yeast extract prevent the conversion of ethanol from glucose?
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| 7. |
Why is a different enyzme involved in each step of glycolysis?
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| 8. |
Glucose is used by nearly every living organism as a nutrient source of energy. Why?
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| 9. |
Which of the following chemical reactions does NOT occur during glycolysis?
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| 10. |
Which of the graphs shown would represent the results of an experiment in which the activity of phosphofructokinase was measured at various ATP concentrations?
 
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| 11. |
If glucose is labeled with 14C, what molecule will become radioactive as glycolysis and the Krebs cycle are completed?
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| 12. |
If glucose is labeled with 18O, what molecule will become radioactive as glycolysis and the Krebs cycle are completed?
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| 13. |
What would have been the result of Krebs and Johnson’s experiment if the Krebs cycle were linear instead of circular?
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| 14. |
If oxygen is labeled with 18O, what molecule will become radioactive as glycolysis and the Krebs cycle are completed?
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| 15. |
Cyanide blocks the function of the electron transport chain. Cyanide treatment will ______ the concentration of glucose in a cell.
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| 16. |
Why does NADH donate electrons to the beginning of the electron transport chain, whereas FADH2 donates electrons to the middle of the chain?
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| 17. |
A proton ionophore, a molecule that forms an artificial channel allowing hydrogen ions to cross membranes, will ______ the concentration of ATP in a cell.
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| 18. |
If a cell is treated with a drug that inhibits ATP synthase, the pH in the mitochondrial matrix will
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| 19. |
If oxygen is removed from a cell, the concentration of lactate will
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| 20. |
Glucose can be converted to fatty acid, but fatty acid cannot be converted to glucose. What does this result suggest?
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Answer choices in this exercise are randomized and will appear in a different order each time the page is loaded.
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