Microbial Fuel Cells
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Questions and Answers

Which of the following is a characteristic of a microbial fuel cell (MFC)?

  • It generates electric current by diverting electrons produced from the microbial oxidation of oxidized compounds on the anode to reduced compounds on the cathode.
  • It generates electric current by diverting electrons produced from the microbial oxidation of reduced compounds on the anode to oxidized compounds on the cathode. (correct)
  • It generates electric current by diverting electrons produced from the microbial reduction of reduced compounds on the anode to oxidized compounds on the cathode.
  • It generates electric current by diverting electrons produced from the microbial reduction of oxidized compounds on the anode to reduced compounds on the cathode.
  • What is the difference between mediated and unmediated MFCs?

  • Mediated MFCs use a mediator to transfer electrons from the bacteria to the anode, while unmediated MFCs use bacteria with electrochemically active redox proteins. (correct)
  • Mediated MFCs use a mediator to transfer electrons from the bacteria to the anode, while unmediated MFCs use bacteria with electrochemically inactive redox proteins.
  • Mediated MFCs use bacteria with electrochemically active redox proteins, while unmediated MFCs use a mediator to transfer electrons from the bacteria to the anode.
  • Mediated MFCs use bacteria with electrochemically inactive redox proteins, while unmediated MFCs use a mediator to transfer electrons from the bacteria to the anode.
  • When were the first MFCs demonstrated?

  • In the late 20th century
  • In the 19th century
  • In the early 20th century (correct)
  • In the 18th century
  • What do microbial fuel cells (MFCs) use to produce electricity?

    <p>Chemical reactions catalyzed by bacteria</p> Signup and view all the answers

    What are the two general categories of MFCs?

    <p>Mediated and unmediated</p> Signup and view all the answers

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