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Which of these bacteria is a redox mediator in microbial fuel cells?

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Which of these bacteria is a redox mediator in microbial fuel cells?

(a) Pseudomonas aeruginosa

(b) Geothrix ferementans

(c) Desulfuromonas acetoxidans

(d) Shewanella oneidenensis

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Asked question is from Microbial Production of Fuels in portion Bioleaching and Biomining for Recovery of Resources of Environmental Biotechnology

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The correct option is (b) Geothrix ferementans

The explanation: Pseudomonas aeruginosa and Shewanella oneidenensis are used as nanowires for electron transfer. Desulfuromonas acetoxidans used as exoelectrogens while Geothrix ferementans produce their own chemical redox mediators.

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