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प्रश्न
Write short notes on the following:
Microbial fuel cells
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उत्तर
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.
संबंधित प्रश्न
Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer.
Biogas, Citric acid, Penicillin and Curd
Cyclosporin - A is an immunosuppressive drug produced from ____________.
Which of the following involves the distillation process?
Study the following statements and select the correct option.
i. Pseudomonas denitrificans can synthesize Vitamin B12.
ii. The microbes Neurospora gossypii and Eremothecium ashbyi produce Vitamin B2.
iii. Vitamin C can be synthesized by the microbe Rhizopus arrhizus.
Match Column I (Product) and Column II (Source organisms/Organisms used in production) and choose the correct option.
| Column I | Column II | ||
| i. | Vitamin C | a. | S. cerevisiae |
| ii. | Beer | b. | A. niger |
| iii. | Chloromycetin | c. | Sclerotiana libertine |
| iv. | Pectinase | d. | S. venezuelae |
The causal organism of foolish seedling disease in rice is ____________.
Match the following list of bacteria and their commercially important products:
| Bacterium | Product |
| A. Aspergillus niger | i. Lactic acid |
| B. Acetobacter aceti | ii. Butyric acid |
| C. Clostridium butylicum | iii. Acetic acid |
| D. Lactobacillus | iv. Citric acid |
Choose the correct match:
What are fermentors?
Match the following pairs:
| Column A | Column B | ||
| Antibiotic produced | Microbial source | ||
| (i) | Penicillin | (a) | Streptomyces venezuelae |
| (ii) | Chloromycetin | (b) | Bacillus licheniformis |
| (iii) | Bacitracin | (c) | Streptomyces aurifaciens |
| (iv) | Erythromycin | (d) | Streptomyces griseus |
| (v) | Streptomycin | (e) | Penicillium chrysogenum |
| (vi) | Terramycin | (f) | Streptomyces erythreus |
Write the microbial source of following organic acid:
Gluconic acid
