Microbes in Human Welfare: MCQs Quiz – 1 12


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MCQs (Multiple Choice Questions) in Quiz Format on “Microbes in Human Welfare“. Quiz No. 1

More MCQs: "Microbes in Human Welfare" | “Biology and Human Welfare” | All MCQs Quiz on "Biology" | More MCQs on Biology

Microbes in Human Welfare: MCQs Quiz - 1

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Question 1
A symbiotic relationship/interaction in which 'one species benefits and the other species is not affected' is called:
A
Ectomycorrhizae
B
Endomycorrhizae
C
Commensalism
D
Helotism
Question 2
Agriculture by using only biofertilizers is called
A
Manuring
B
Composting
C
Inorganic farming
D
Organic farming
Question 3
Bacterial leaf blight of rice is caused by a species of:
A
Envinia
B
Xanthomonas
C
Pseudomonas
D
Alternaria
Question 4
Cyanobacteria serves as important biofertilizers in the fields of
A
Rice
B
Maize
C
Wheat
D
Sugar cane
Question 5
Ethanol is commercially produced through a particular species of
A
Aspergillus
B
Saccharomyces
C
Clostridium
D
Trichoderma
Question 6
Human insulin is being commercially produced from a transgenic species of
A
Saccharomyces
B
Escherichia
C
Mycobacterium
D
Rhizobium
Question 7
Which one of the following is not used in organic farming?
A
Snail
B
Glomus
C
Earthworm
D
Oscillatoria
Question 8
One of the free-living anaerobic nitrogen-fixer is
A
Azotobacter
B
Beijerinckia
C
Rhodospirillum
D
Rhizobium
Question 9
Organism like Escherichia coli and Chlamydia trachomatis fall into which domain?
A
Eukarya
B
Archaea
C
Bacteria
D
Animalia
Question 10
Organisms called Methanogens are most abundant in a
A
Hot spring
B
Sulphur rock
C
Cattle yard
D
Polluted stream
Question 11
Physical removal of large and small from the sewage through filtration and sedimentation is called:
A
Primary treatment
B
Secondary treatment
C
Tertiary treatment
D
Quaternary treatment
Question 12
Secondary sewage treatment is mainly a
A
Biological process
B
Physical process
C
Mechanical process
D
Chemical process
Question 13
Select the correct statement from the following
A
Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria
B
Biogas is produced by the activity of aerobic bacteria on animal waste
C
Methanobacterium is an aerobic bacterium found in rumen of cattle
D
Biogas, commonly called gobar gas, is pure methane
Question 14
Semiconservative replication of DNA was first demonstrated in
A
Salmonella typhimurium
B
Drosophila melanogaster
C
Escherichia coli
D
Streptococcus pneumoniae
Question 15
Some hyperthermophilic organisms that grow in highly acidic (pH2) habitats belong to the two groups
A
Liverworts and yeasts
B
Eubacteria and archaea
C
Cyanobacteria and diatoms
D
Protists and mosses
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12 thoughts on “Microbes in Human Welfare: MCQs Quiz – 1

  • Chinnu

    Azotobacter is freeliving but it is aerobic according to xi biology mineral nutrition topic. Here they asked the free living anaerobic so we have to go with rhodospirillum

  • anudeep

    In 8 th question azotobacter is a free living bacteria according to NCERTxii biology

      • Sarlongki

        I think because it give free living anaerobic ……. firstly i also chosen azotobacter ,it was in correct …..

  • Deepti

    In Q-8 Azotobacter is also a free living N fixer.So why that option is not correct

    • Vishal

      NCERT BIO-11, Pg.202, 2nd para,
      Examples of free living N-fixing AEROBIC MICROBES are Azotobacter and Beijernickia “WHILE RHODOSPIRILLUM IS ANEROBIC…”
      Question is asking about Anerobic one.

  • babu rbk

    It is very good to prepare to the neet examination earlier

  • somdatta ganguly

    arey vah!!! asi tan kamal kar dita.. bina padhe v enna vadiya reslt a skda menu tan pata v ni c.. changa c:):)trust me guys.. d ques r awesm.. jst try it out.. u r gona lov it.. me sersly ye chptr bina pdhe baith gyi ti..bt i got all ans corct…lovd it…:):)

  • salah salam

    nysh….questions….
    made me think a lot…