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Question
Write short notes on the following:
Microbial fuel cells
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Solution
A microbial fuel cell is a bio-electrochemical system that drives an electric current by using bacteria and mimicking bacterial interaction found in nature. Microbial fuel cells work by allowing bacteria to oxidize and reduce organic molecules. Bacterial respiration is basically one big redox reaction in which electrons are being moved around. A MFC consists of an anode and a cathode separated by a proton exchange membrane. Microbes at the anode oxidize the organic fuel generating protons which pass through the membrane to the cathode and the electrons pass through the anode to the external circuit to generate current.
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Match List - I with List - II.
| List I | List II | ||
| (a) | Aspergillus niger | (i) | Acetic Acid |
| (b) | Acetobacter aceti | (ii) | Lactic Acid |
| (c) | Clostridium butylicum | (iii) | Citric Acid |
| (d) | Lactobacillus | (iv) | Butyric Acid |
Choose the correct answer from the options given below.
Write the most important characteristic that Aspergillus niger, Clostridium butylicum, and Lactobacillus share.
Identify the enzyme ‘A’ in a given reaction.
\[\ce{Fumaric acid + H2O ->['A']Malate}\]
Mention the respective source and state the specific use of any two bioactive molecules.
