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Microbes in Human Welfare Test - 17

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Microbes in Human Welfare Test - 17
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Modern detergents contain enzyme preparation of.
    Solution
    The enzymes used in detergents must be able to perform the task in the presence of anionic and non-anionic detergents,soaps,oxidants, etc at pH between 8-10.5%.Alkaline detergent contain enzyme preparation of alkaliphiles.
    Correct answer-D
  • Question 2
    1 / -0
    Sewage treatment process in which part of decomposer bacteria is recycled into starting of the process is called.
    Solution
    A part of the activated sludge is pumped back into the aeration tank to serve as an inoculum in activated sludge treatment.
    Correct answer-D
  • Question 3
    1 / -0
    A common biocontrol agent for plant diseases is?
    Solution
    Trichoderma fungus is a common biological control for a range of plant pathogens.
    Correct answer-C
  • Question 4
    1 / -0
    They help in increasing soil fertility.
    Solution
    Nostoc and legumes help in increasing soil fertility by nitrogen fixation in the soil.
    Correct answer-D
  • Question 5
    1 / -0
    Which of the following microorganisms is used as a biofertilizer?
  • Question 6
    1 / -0
    Which of the following act as a biofertilizers?
  • Question 7
    1 / -0
    The product of which has been commercialised for lowering blood cholesterol.
    Solution
    Monascus yeast are commercially being used for lowering blood cholestrol levels.
    Correct answer-B 
  • Question 8
    1 / -0
    Microbe used for biocontrol of pest butterfly caterpillars is?
    Solution
    $$Bacillus$$ $$thuringiensis$$ are regarded as excellent biocontrol agents for butterfly caterpillars and hence used as a bioinsecticide.
    Correct answer-A
  • Question 9
    1 / -0
    The residue left after methane production from cattle dung is:
    Solution
    The residue left after methane production from cattle dung is used as manure because it supply some organic materials and minerals to the soil.
    So, the correct answer is 'used as manure'
  • Question 10
    1 / -0
    Biofertilizer is?
    Solution
    A biofertilizer is a substance which contains nutrient rich living microorganisms which colonize the rhizosphere or the interior of the plant and promotes the growth of the plant or the seed by increasing the availability of primary nutrients to the plant.
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