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Unformatted text preview: Bio 1A – Study Questions, Cellular respiration Please remember that these are questions to help you organize the material. For the exam, you are responsible for all of the topics covered in the lecture and in the assigned chapters/pages of the textbook. Please work through the problems in the textbook to test yourself as you study. 1. What are the different phases of respiration? 2. What is fermentation? When does it occur, and what are the biochemical products of this process? 3. How do substrate‐level phosphorylation and oxidative phosphorylation differ? 4. What is glycolysis and what kinds of cells use this pathway? Where does glycolysis occur in the cell and what are its metabolic products? What steps in glycolysis are directly responsible for ATP synthesis? 5. What is the function of the Krebs cycle? Where do these reactions occur? What are the reaction products, and key regulatory steps? 6. List some of the electron carriers in the respiratory electron transport chain and their location in the cell. What is a cytochrome, and what is its function during electron transport? 7. Describe how the mitochondrial respiratory chain makes ATP. What is the role of ATP synthase in this process? 8. What are the similarities and differences between ATP synthesis in the mitochondrion and the chloroplast? 9. What is the efficiency of ATP formation in respiration with glucose as the starting substrate? How many ATP molecules are made in the 3 different stages of respiration? 10. Why is the efficiency of ATP production different in a bacterial cell versus a eukaryotic cell? 11. What is the function of NAD+ during respiration? 12. How does a yeast cell survive in the absence of oxygen? What happens to the cell’s metabolism once oxygen becomes available? Are any of these processes similar to what happens in a muscle cell? 13. Where does oxidative phosphorylation take place in a bacterial cell? 14. What is a redox reaction? Why is this kind of chemistry useful in metabolism? ...
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- Spring '08