Microbes In Human Welfare

10 Questions
  1. 1
    With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements :
    1. Biofilters provide waste treatment by removing uneaten fish feed.
    2. Biofilters convert ammonia present in fish waste to nitrate.
    3. Biofilters increase phosphorus as nutrient for fish in water.
    How many of the statements given above are correct?
    UPSC CSE I - 2023
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    Answer: B. Only two

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  2. 2
    Consider the following statements :
    1. Some mushrooms have medicinal properties.
    2. Some mushrooms have psychoactive properties.
    3. Some mushrooms have insecticidal properties.
    4. Some mushrooms have bioluminescent properties.
    How many of the above statements are correct?
    UPSC CSE I - 2023
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    Answer: D. All four

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  3. 3
    Consider the following statements in respect of probiotics :
    1. Probiotics are made of both bacteria and yeast.
    2. The organisms in probiotics are found in foods we ingest but they do not naturally occur in our gut.
    3. Probiotics help in the digestion of milk sugars.
    Which of the statements given above is/are correct ?
    UPSC CSE I - 2022
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    Answer: C. 1 and 3

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  4. 4
    Consider the following statements :
    1. Biofilms can form on medical implants within human tissues.
    2. Biofilms can form on food and food processing surfaces.
    3. Biofilms can exhibit antibiotic resistance.
    Which of the statements given above are correct ?
    UPSC CSE I - 2022
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    Answer: D. 1, 2 and 3

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  5. 5
    Consider the following:
    1. Bacteria
    2. Fungi
    3. Virus
    Which of the above can be cultured in artificial/synthetic medium?
    UPSC CSE I - 2021
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    Answer: A. 1 and 2 only

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  6. 6
    Consider the following organisms:
    1. Agaricus
    2. Nostoc
    3. Spirogyra
    Which of the above is/are used as biofertilizer/biofertilizers?
    UPSC CSE I - 2013
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    Answer: B. 2 only

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  7. 7
    Consider the following kinds of organisms:
    1. Bacteria
    2. Fungi
    3. Flowering plants
    Some species of which of the above kinds of organisms are employed as biopesticides?
    UPSC CSE I - 2012
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    Answer: D. 1, 2 and 3

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  8. 8

    Consider the following statements about probiotic food:

    1. Probiotic food contains live bacteria which are considered beneficial to humans.
    2. Probiotic food helps in maintaining gut flora.

    Which of the statements given above is/are correct?

    UPSC CSE I - 2008
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    Answer: C. Both l and 2

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  9. 9

    Which one of the following organisms can serve as a biofertilizer for rice crop?

    UPSC CSE I - 2000
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    Answer: A. Blue­green algae

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  10. 10

    Which one of the following type of micro organisms is most widely used in industries?

    UPSC CSE I - 1998
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    Answer: D. Bacteria, microalgae and fungi

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