Microbes In Human Welfare

15 Questions

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Organization Quizzes & Trivia

Time: 30 Minute


Questions and Answers
  • 1. 
    Select the correct species which does not have the ability to fix atmospheric nitrogen?
    • A. 

      Nostoc

    • B. 

      Spirogyra

    • C. 

      Azotobacter

    • D. 

      Anabaena

  • 2. 
    The aquatic fern essential for paddy fields is
    • A. 

      Marsilea

    • B. 

      Azolla

    • C. 

      Ophioglossum

    • D. 

      Adiantum

  • 3. 
    Biological control of agricultural pests unlike chemical control is
    • A. 

      Very expensive

    • B. 

      Toxic

    • C. 

      Self perpetuating

    • D. 

      Polluting

  • 4. 
    Azotobacter and Bacillus polymyxa are the examples of
    • A. 

      Symbiotic N2 fixers

    • B. 

      Non-symbiotic N2 fixer

    • C. 

      Pathogenic bacteria

    • D. 

      Decomposers

  • 5. 
    Integrated pest management programme (IPM) emphasizes on
    • A. 

      Biological control

    • B. 

      Confusion technique

    • C. 

      Pesticides

    • D. 

      None of these

  • 6. 
    Idly batter is fermented by
    • A. 

      Lactic acid fungi

    • B. 

      Lactic

    • C. 

      Acetic acid fungi

    • D. 

      Acetic acid Bacteria

  • 7. 
    Fungal pectinase is produced by
    • A. 

      Aspergillus niger

    • B. 

      Aspergillus wentii

    • C. 

      Aspergillus megaterium

    • D. 

      Both a and b

  • 8. 
    The inexpensive and less complicated step of sewage water treatment is
    • A. 

      Primary treatment

    • B. 

      Secondary treatment

    • C. 

      Tertiary treatment

    • D. 

      None of these

  • 9. 
    • A. 

      Bacterum thuringiensis

    • B. 

      Bacterium thuringensis

    • C. 

      Bacillus turingenses

    • D. 

      Bacillus thuringiensis

  • 10. 
    Salts of nitrogen and phosphorous must be removed from treated sewage water as they cause
    • A. 

      harm

    • B. 

      Spoilage

    • C. 

      Eutrophication

    • D. 

      Eutrophism

  • 11. 
     Symbiotic association between a fungus and roots of higher plants is called
    • A. 

      Mycelium

    • B. 

      Mycorrhiza

    • C. 

      Helotism

    • D. 

      None of these

  • 12. 
    BOD stands for
    • A. 

      Biochemical oxygen demand

    • B. 

      Biophysical oxygen demand

    • C. 

      Biological oxygen demand

    • D. 

      All of these

  • 13. 
    Acetobacter aceti is involved in production of
    • A. 

      Lactic acid

    • B. 

      Acetic acid

    • C. 

      Citric acid

    • D. 

      Butyric acid

  • 14. 
    Microbes are used to kill harmful pests. This process is called
    • A. 

      Bio microbial action

    • B. 

      Bio contro

    • C. 

      Bio care

    • D. 

      None of these

  • 15. 
    Now the day came when we need to use
    • A. 

      Chemical fertilizers

    • B. 

      N-P-K fertilizers

    • C. 

      Bio fertilizers

    • D. 

      All of these