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Microbes in Human Welfare Test - 46

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Microbes in Human Welfare Test - 46
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Most abundant prokaryotes helpful to humans in making curd and antibiotics are
  • Question 2
    1 / -0
    Penicillin was first commercially prepared in
    Solution

    Between 1941 and 1943, Moyer, Coghill and Raper at the USDA Northern Regional Research Laboratory (NRRL) located in the United States, developed methods for industrialized penicillin production. They started isolating high yield penicillium strains.

    So the correct option is C.
  • Question 3
    1 / -0
    Azolla pinnate is allowed to grow in rice fields because.
    Solution

    Azolla free-floating freshwater fern that harbors nitrogen-fixing cyanobacterium Anabaena azollae by symbiosis relationship in its dorsal leaves. It is capable of fixing atmospheric carbon dioxide and nitrogen and is known as a potent nitrogen fixer.

    This nitrogen-fixing capacity helps the plant benefit in a positive manner with the increase in yield and size and it served as the nitrogen requirement for rice.

  • Question 4
    1 / -0
    Streptokinase is used for _______
    Solution
    Streptokinase is used to dissolve and clear the blood clots that have formed in the blood vessels immediately after the symptoms of a heart attack or thrombosis.
  • Question 5
    1 / -0
    Sesbania rostrate is preferred as green manure over other species because.
    Solution

    Sesbania rostrate is mainly used as green manure to improve the fertility of the soil due to its fast growth, high biomass production and the ability to convert atmospheric nitrogen into a usable form for plants.

  • Question 6
    1 / -0
    Which one of the following pairs serve as biofertilizers?
  • Question 7
    1 / -0
    The most potent biofertilizer for sugarcane is?
  • Question 8
    1 / -0
    Treatment of polluted water is carried out with the help of ?
    Solution
    The polluted water specifically rich in organic matter is required to e treated with decomposing microbes like fungi and bacteria in the sewage water treatment units. These break down the organic matter into simpler inorganic compounds, thereby making sure that the water does not have high biological oxygen demand when released in the rivers and lakes. Furthermore, the microbial treated water is given chemical treatment so that any harmful microbe, if present, can be killed. Lichens are used as pollution indicators. Phytoplanktons are the producers in the aquatic food chain
    So, the correct answer is 'Fungi'
  • Question 9
    1 / -0
    Sewage sludge is used as a
    Solution
    Sewage sludge is a product of wastewater treatment. Once treated, sewage sludge is then dried and added to a landfill, applied to agricultural cropland as fertilizer, or bagged with other materials and marketed as “bio-solid compost” for use in agriculture and landscaping.
    Hence, the correct answer should be 'Both A and B'.
  • Question 10
    1 / -0
    Which one of the following is associated with denitrification?
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