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NEET Biology · Microbes in Human Welfare · Set 1 (Q1-30)

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  1. 1.
    Among the following pairs of microbes, which pair has both the microbes that can be used as biofertilizers?
    1. (1)Aspergillus and Rhizopus
    2. (2)Rhizobium and Rhizopus
    3. (3)Cyanobacteria and Rhizobium
    4. (4)Aspergillus and Cyanobacteria
  2. 2.
    Which one of the following helps in absorption of phosphorus from soil by plants?
    1. (1)Rhizobium
    2. (2)Frankia
    3. (3)Anabaena
    4. (4)Glomus
  3. 3.
    The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are ones categorised as:
    1. (1)Chemosynthetic autotrophs
    2. (2)Heterotrophic bacteria
    3. (3)Cyanobacteria
    4. (4)Archaebacteria
  4. 4.
    Biological control agent obtained from :-
    1. (1)Bacillus thuringiensis
    2. (2)E.coli
    3. (3)Agrobacterium tumifaciens
    4. (4)Meloidogyne incognitia
  5. 5.
    Monascus purpureus is a yeast used commercially in the production of
    1. (1)Ethanol
    2. (2)Streptokinase for removing clots from the blood vessels
    3. (3)Citric acid
    4. (4)Blood cholesterol lowering statins
  6. 6.
    Select the correct statement from the following.
    1. (1)Biogas is produced by the activity of aerobic bacteria on animal waste.
    2. (2)Methanobacterium is an aerobic bacterium found in rumen of cattle.
    3. (3)Biogas, commonly called gobar gas, is pure methane.
    4. (4)Activated sludge-sediment in settlement tank of sewage treatment plant is a right source of aerobic bacteria
  7. 7.
    Which of the following can be used as a biocontrol agent in the treatment of plant disease?
    1. (1)Trichoderma
    2. (2)Chlorella
    3. (3)Anabaena
    4. (4)Lactobacillus
  8. 8.
    The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the :-
    1. (1)Halophiles
    2. (2)Thermoacidiophiles
    3. (3)Methanogens
    4. (4)Eubacteria
  9. 9.
    Conversion of milk to curd improves its nutritional value by increasing the amount of
    1. (1)Vitamin D
    2. (2)Vitamin A
    3. (3)Vitamin
    4. (4)Vitamin E
  10. 10.
    Select the correct group of biocontrol agents.
    1. (1)Bacillus thuringiensis,Tobacco mosaic virus, Aphids
    2. (2)Trichoderma, Baculovirus, Bacillus thuringiensis
    3. (3)Oscillatoria, Rhizobium, Trichoderma
    4. (4)Nostoc, Azospirillium, Nucleopolyhedrovirus
  11. 11.
    Identify the microorganism which is responsible for the production of an immunosuppressive molecule cyclosporin A:
    1. (1)Clostridium butylicum
    2. (2)Aspergillus niger
    3. (3)Streptococcus cerevisiae
    4. (4)Trichoderma polysporum
  12. 12.
    When domestic sewage mixes with river water
    1. (1)Small animals like rats will die after drinking river water.
    2. (2)The increased microbial activity releases micronutrients such as iron.
    3. (3)The increased microbial activity uses up dissolved oxygen.
    4. (4)The river water is still suitable for drinking as impurities are only about 0.1 per cent
  13. 13.
    Which of the following is a free living biocontrol microbial agent for plant pathogen?
    1. (1)Mucor
    2. (2)Glomus
    3. (3)Trichoderma
    4. (4)Rhizobium
  14. 14.
    A nitrogen-fixing microbe associated with Azolla in rice field is
    1. (1)Spirulina
    2. (2)Anabaena
    3. (3)Frankia
    4. (4)Tolypothrix
  15. 15.
    A biocontrol agent to be a part of an integrated pest management should be
    1. (1)Species-specific and symbiotic
    2. (2)Free living and broad spectrum
    3. (3)Narrow spectrum and symbiotic
    4. (4)Species-specific and inactive on nontarget organisms
  16. 16.
    Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:
    1. (1)Growth response
    2. (2)Defence action
    3. (3)Effect on reproduction
    4. (4)Nutritive value
  17. 17.
    Which one of the following is an example that carries out biological control of pests/diseases using microbes?
    1. (1)Trichoderma sp. against certain plant pathogens
    2. (2)Nucleopolyhedrovirus against white rust in Brassica
    3. (3)Bt-cotton to increase cotton yield
    4. (4)Ladybird beetle against aphids in mustard
  18. 18.
    During sewage treatment, biogases are produced which include :
    1. (1)hydrogensulphide, nitrogen, methane
    2. (2)methane, hydrogensulphide, carbon dioxide
    3. (3)methane, oxygen, hydrogensulphide
    4. (4)hydrogensulphide, methane, Sulphur dioxide
  19. 19.
    A patient brought to a hospital with myocardial infarction is normally immediately given :-
    1. (1)Cyclosporin-A
    2. (2)Statins
    3. (3)Penicillin
    4. (4)Streptokinase
  20. 20.
    Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?
    1. (1)Yeast – statins
    2. (2)Acetobacter aceti – acetic acid
    3. (3)Clostridium butylicum – lactic acid
    4. (4)Aspergillus niger – citric acid
  21. 21.
    Which one of the following is not used in organic farming?
    1. (1)Glomus
    2. (2)Earthworm
    3. (3)Oscillatoria
    4. (4)Snail
  22. 22.
    For the commercial and industrial production of Citric Acid, which of the following microbes is used?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  23. 23.
    A common biocontrol agent for the control of plant diseases is
    1. (1)Baculovirus
    2. (2)Bacillus thuringiensis
    3. (3)Glomus
    4. (4)Trichoderma
  24. 24.
    Which of the following is a commercial blood cholesterol lowering agent?
    1. (1)Cyclosporin A
    2. (2)statin
    3. (3)Streptokinase
    4. (4)Lipases
  25. 25.
    Statins commmercially used as blood cholesterol lowering agents are produced by :-
    1. (1)Agrobacterium tumefaciens
    2. (2)Trichoderma polysporum
    3. (3)Monascus purpureus
    4. (4)Trichoderma viridae
  26. 26.
    The continuous addition of sugars in ‘fed batch’ fermentation is done to
    1. (1)Obtain antibiotics
    2. (2)Purify enzymes
    3. (3)Degrade sewage
    4. (4)Produce methane
  27. 27.
    Read the following statement having two blanks (A and B).
    “A drug used for (A) patients is obtained from a species of the organism (B)”
    The one correct option for the two blanks is
    (A) (B)
    1. (1)Heart Penicillium
    2. (2)Organ-transplant Trichoderma
    3. (3)Swine flu Monascus
    4. (4)AIDS Pseudomonas
  28. 28.
    Which of the following is wrongly matched in the given table?

    Microbe
    Product
    Application
    1. (1)Trichoderma pdyspomm
      Cyclosporin A
      immunosup- pressive drug
    2. (2)Monascus purpureus
      Statins
      lowering of blood cholesterol
    3. (3)Streptococcus
      Streptokinase
      removal of
      clot from blood vessel
    4. (4)Clostridium
      bufylicum
      Lipase
      removal of
      oil stains
  29. 29.
    Which of the following is correctly matched for the product produced by them ?
    1. (1)Methanobacterium : Lactic acid
    2. (2)Penicillium notatum : Acetic acid
    3. (3)Sacchromyces cerevisiae : Ethanol
    4. (4)Acetobacter aceti : Antibiotics
  30. 30.
    Select the correct group of biocontrol agents.
    1. (1)Bacillus thuringiensis, Tobacco mosaic virus, Aphids
    2. (2)Trichoderma, Baculovirus, Bacillus thuringiensis
    3. (3)Oscillatoria, Rhizobium, Trichoderma
    4. (4)Nostoc, Azospirillum, Nucleopolyhedrovirus