Brock Biology of Microorganisms (15th Edition)
15th Edition
ISBN: 9780134261928
Author: Michael T. Madigan, Kelly S. Bender, Daniel H. Buckley, W. Matthew Sattley, David A. Stahl
Publisher: PEARSON
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Chapter 17.13, Problem 1MQ
- What phylogenetic and physiological evidence suggests that today’s hyperthermophiles are the closest living links to Earth’s earliest cells?
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Why might H2 metabolism have evolved as amechanism for energy conservation in the earliestorganisms on Earth?
Chapter 17 Solutions
Brock Biology of Microorganisms (15th Edition)
Ch. 17.1 - Since cells of Halobacterium require high levels...Ch. 17.1 - What benefit does bacteriorhodopsin confer on...Ch. 17.1 - Contrast the roles of bacteriorhodopsin,...Ch. 17.2 - Prob. 1MQCh. 17.2 - Prob. 2MQCh. 17.2 - Prob. 1CRCh. 17.3 - Prob. 1MQCh. 17.3 - Prob. 2MQCh. 17.3 - What two major physiological features unify...Ch. 17.4 - Prob. 1MQ
Ch. 17.4 - Prob. 2MQCh. 17.4 - Prob. 1CRCh. 17.5 - Prob. 1MQCh. 17.5 - Prob. 2MQCh. 17.5 - Prob. 1CRCh. 17.6 - Prob. 1MQCh. 17.6 - Prob. 2MQCh. 17.6 - Prob. 1CRCh. 17.7 - Prob. 1MQCh. 17.7 - Prob. 1CRCh. 17.8 - What form of energy metabolism is widespread among...Ch. 17.8 - Prob. 2MQCh. 17.8 - Prob. 1CRCh. 17.9 - Prob. 1MQCh. 17.9 - Prob. 2MQCh. 17.9 - Prob. 1CRCh. 17.10 - What can we conclude about the...Ch. 17.10 - Prob. 2MQCh. 17.10 - Prob. 1CRCh. 17.11 - Prob. 1MQCh. 17.11 - Why would it be impossible for organisms to grow...Ch. 17.11 - What organism is the current record holder for the...Ch. 17.12 - How do hyperthermophiles keep proteins and DNA...Ch. 17.12 - How are the lipids and ribosomes of...Ch. 17.12 - What is reverse DNA gyrase and why is it important...Ch. 17.13 - What phylogenetic and physiological evidence...Ch. 17.13 - Prob. 2MQCh. 17.13 - Which chemolithotrophic lifestyle seems best...Ch. 17.13 - Why might H2 metabolism have evolved as a...Ch. 17 - Using the phylogenetic tree in Figure 17.1 as a...Ch. 17 - Prob. 2AQ
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- Of what evolutionary significance is the fact that organisms inthe Aquifex lineage are both hyperthermophilic and H2chemolithotrophs?arrow_forwardWhat would life be like for photoautotrophs if there were no chemoheterotrophs if there were no photoautotrophs?arrow_forwardWhich phyla of Bacteria contain anoxygenic phototrophs? Which phylum contains purple sulfur bacteria?Which phylum contains green sulfur bacteria?arrow_forward
- Describe the metabolic pathways that occur for cells in the presence of oxygen and the evolutionary advantages for eurkaryotic cellsarrow_forwardWhy do anaerobic hyperthermophiles sit on the lowest branches of the archaeal tree?arrow_forwardWhat would life be like for photosutotrophs if there were no chemoheterotrophs? for chemoheterotrophs if there were no photosutotrophs?arrow_forward
- Although chemoautotrophs serve as the primary producers near hydrothermal vents, animals there still ultimately depend on the photosynthetic activities of plants and cyanobacteria. Why?arrow_forwardWhat is the evolutionary significance of the enzymes; superoxide dismutase, catalase and peroxidase?arrow_forwardA filamentous organism has been isolated from decomposing organic matter. This organism has a cell wall but no chloroplasts. How would you classify this organism?arrow_forward
- What can MAR-FISH tell you that FISH alone cannot?How might you combine SIP and NanoSIMS toidentify novel methane-consuming cells in anatural community?arrow_forwardCompare photo litho autotrophy with chemo-organo heterotrophy. Sun light is the ultimate source of energy and all living organisms obtain their energy directly or indirectly from the sun. However in deep-sea vents (where there is no sun light) life has originated and the many groups of microorganisms are flourishing in such environment. How? Explain your reasoningarrow_forwardHow might the use of isozymes permit an aquatic organism to persist with a gradual increase in thermal pollution but not a rapid increase in thermal pollution?arrow_forward
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