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Cards In This Set
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T or F, Bacteria possess diverse metabolic pathways?
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True
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In aerobic conditions, what acts as the final electron acceptor in the electron transport chain?
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Oxygen
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Where is the electron transport chain located in the bacteria?
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Plasma membrane
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What is the term for O2 acting as the final electron acceptor in the electron transport chain?
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Aerobic Cellular Respiration
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What is the shuttling of electrons through the ETC allow establishment of?
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An electrochemical gradient where differences in H+ ions and charge across the plasma membrane which results in ATP via the membrane bound enzyme ATP synthase
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What is it when some bacteria shift their metabolic pathways to include anaerobic respiration and/ or fermentation?
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This happens in the absence of oxygen
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What is anaerobic respiration?
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Alternatives to O2 are utilized as the final electron acceptor in the ETC
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What are the alternatives to O2?
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Nitrate, Sulfate, Sulfur and Carbonate
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What is fermentation?
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Organic molecules like pyruvate and pyruvate derivatives act as the final electron acceptors allowing glycolois to continue in the absence of oxygen. Each round of glycolysis produces 2 ATP's per glucose
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What are obligate aerobes?
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Organisms that soley rely on oxygen for cellular respiration
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What is a facultative anaerobe?
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An organism that can use oxygen for ATP production but can also grow without it
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What is an obligate anaerobe?
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Organism that is unable to grow in the presence of oxygen due to the toxic nature of alternative forms of oxygen
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What are aerotolerant anaerobes?
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Bacteria that don't use oxygen to produce ATP but can tolerate (grow) in the presence of oxygen
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What are microaerophiles?
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Bacteria that use oxygen for energy production but only in very low concentrations
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What levels of oxygen are toxic for Microaerophiles?
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High levels
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