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Microbes in Human Welfare Test - 40

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Microbes in Human Welfare Test - 40
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  • Question 1
    1 / -0
    A compound produced by an organism that inhibits the growth of another micro-organism is called
    Solution
    Antiseptic are antimicrobial substances prevents growth of disease causing organisms.
    Antibiotic is a compound produced by an organism that inhibits the growth of other micro-organisms
    Anticoagulent are chemical substances that prevent or reduce blood coagulation.
    Antibodies or immunoglobulin is a protein used to neutralize pathogens.
    So, the correct answer is 'Antibiotic'.
  • Question 2
    1 / -0
    Which microorganism is employed in production of dextran?
    Solution

  • Question 3
    1 / -0
    Cyclosporin A, used as immunosuppressive agent is obtained from
  • Question 4
    1 / -0
    Passage of effluents into oxidation tank is for
    Solution
    • Wastewater treatment is divided into three stages, namely primary, secondary and tertiary treatment. 
    • Primary treatment consists of temporarily holding the sewage where heavy solids settle down and oil, grease, and lighter solids float to the surface. 
    • Secondary treatment is biological treatment. In this, a wide variety of microorganisms are used under aerobic conditions. The microorganisms convert biodegradable organic matter present in wastewater into simple substances. Aerobic biological treatment processes include passage of effluents (wastewater) into oxidation tank to provide aeration necessary for the action of aerobic microorganisms.
    • Tertiary treatment includes chlorination, ultrafiltration.

    So, the correct answer is option B.
  • Question 5
    1 / -0
    Waksman got Nobel Prize for his discovery of
  • Question 6
    1 / -0
    Blood cholesterol lowering statins are obtained from
  • Question 7
    1 / -0
    The technology of biogas production was developed in India through the efforts of
  • Question 8
    1 / -0
    Streptomycin is prepared from ?
    Solution
    Bioactive molecules are those molecules that are functional in a living system or can interact with their components. Microbes are used for commercial and industrial production of certain chemicals ( bioactive molecules ) like organic acids, enzymes, cyclosporin A and statins. There are bulk of antibiotics which are obtained from Actinomycetes. Streptomycin is obtained from Streptomyces griseus. 
    So, the correct answer is 'Streptomyces griseus'
  • Question 9
    1 / -0
    Thurioside is proteinaceous toxin obtained from
    Solution
    Thurioside is obtained from bacteria Bacillus thuringiensis, used as a bioinsecticide.
    Correct answer-C.
  • Question 10
    1 / -0
    Citric acid is obtained from _______
    Solution
    Bioactive molecules are those molecules that are functional in living system or can interact with their components. Microbes are used for commercial and industrial production of certain chemicals ( bioactive molecules ) like organic acids, enzymes, cyclosporin A and statins. Certain microbes have the ability to convert carbohydrates into organic acids. Aspergillus niger ( fungus ) is used to get Citric acid. 
    So, the correct answer is 'Aspergillus niger'
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