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QuestionsNRGGeneration_1

QuestionsNRGGeneration_1 - Questions and Answers for...

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Unformatted text preview: Questions and Answers for Energy Generation Lecture 1. You have identified a chemoautotroph that appears to use HS ­ and Fe3+ to generate energy via respiration. Draw a picture of the putative ETS possessed by this bacterium. See Table 8.4 (The Electron Tower) on page 215 for assistance. 2. What is different about the electron transfer during respiration and fermentation? a. It only occurs in the membrane during respiration. b. It is only coupled to proton transport during fermentation. c. An oxidation ­reduction reaction is only carried out during fermentation. d. NADH is only an electron donor during fermentation. 3. ATP is expended during many different fermentation reactions. The purpose of this activation step is… a. to carry out a energy ­yielding, oxidation ­reduction reaction. b. to yield a high energy, phosphorylated intermediate. c. to carry out substrate ­level phosphorylation. d. to yield a molecule that can undergo an oxidation ­reduction reaction. e. to regenerate NAD+. 4. Why is less energy generated by a chemoheterotroph that is fermenting glucose versus a chemoheterotroph that is respiring with glucose and O2? 5. What is the function of light in photosynthesis? 6. List two mechanisms microbes have to increase the harvesting of light? 7. Why is PSII of oxygenic photosynthetic bacteria able to evolve O2 whereas PSII of Purple bacteria is not? 8. What determines the amount of energy released from an oxidation ­reduction reaction? ...
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