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Biology · MICROBES IN HUMAN WELFARE

हिन्दी

Which of the following microorganisms is primarily responsible for the production of methane gas in anaerobic sludge during sewage treatment and in the rumen of cattle?

  1. Trichoderma polysporum
  2. Lactobacillus
  3. Saccharomyces cerevisiae
  4. Methanobacterium

Correct answer · Option 4

Methanobacterium

Explanation

Methanobacteria are anaerobic bacteria that grow on cellulosic material and produce large amounts of methane along with CO2 and H2, commonly found in anaerobic sludge and cattle rumen.

Related questions

Given below are two statements: Statement I: Alexander Fleming, Ernst Chain and Howard Florey were awarded the Nobel Prize in 1945 for the discovery and potential establishment of Penicillin as an effective antibiotic. Statement II: Streptokinase is used as a clot buster because of its immunosuppressive action in organ-transplant patients. In the light of the above statements, choose the most appropriate answer from the options given below:→Which bioactive molecule is commercially used as an immunosuppressive agent in organ-transplant patients?→Which microbial enzyme is used in detergent formulations and is helpful in removing oily stains from laundry?→Consider the following statements regarding secondary sewage treatment and sludge processing: (A) The effluent is passed into aeration tanks where growth of aerobic microbes forms flocs. (B) The BOD of sewage is significantly reduced during the aeration tank process. (C) A small part of the activated sludge is pumped back into the aeration tank to serve as inoculum. (D) Anaerobic sludge digesters produce gases such as methane, hydrogen sulphide and carbon dioxide. How many of the above statements are correct?→
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