Microbes in Human Welfare: MCQs Quiz – 3 4


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Microbes in Human Welfare Questions: MCQs (Multiple Choice Questions) in Quiz Format on ‘Microbes in Human Welfare’. Quiz No. 3

Microbes in Human Welfare: MCQs Quiz - 3

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Question 1
A nitrogen fixing microbe associated with Azolla in rice fields is
A
Frankia
B
Tolypothrix
C
Spirulina
D
Anabaena
Question 2
Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition?
A
Glomus
B
Trichoderma
C
Azotobacter
D
Aspergillus
Question 3
A patient brought to a hospital with myocardial infarction is normally immediately given
A
Cyclosporin–A
B
Statins
C
Penicillin
D
Streptokinase
Question 4
The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorized as
A
Chemosynthetic autotrophs
B
Heterotrophic bacteria
C
Cyanobacteria
D
Archaebacteria
Question 5
Monascus purpureus is a yeast used commercially in the production of
A
Citric acid
B
Blood cholesterol lowering statins
C
Ethanol
D
Streptokinase for removing clots from the blood vessels
Question 6
Two microbes found to be very useful in genetic engineering are
A
Diplococcus sp. and Pseudomonas sp.
B
Vibrio cholerae and a tailed bacteriophage
C
Escherichia coli and Agrobacterium tumefaciens
D
Crown gall bacterium and Caenorhabditis elegans
Question 7
Which one of the following plant is commonly used as green manure?
A
Cassia fistula
B
Acacia nilotica
C
Dalbergia sissoo
D
Crotalaria juncea
Question 8
Rotenone is
A
A bioherbicide
B
A natural insecticide
C
An insect hormone
D
A natural herbicide
Question 9
The biological control of agricultural pests, unlike chemical control is
A
Very expensive
B
Polluting
C
Self perpetuating
D
Toxic
Question 10
Azolla is used as a biofertilizer because it
A
Has association of nitrogen fixing Cyanobacteria
B
Has association of nitrogen fixing Rhizobium
C
Multiplies very fast to produce massive biomass
D
Has association of mycorrhiza
Question 11
Green manure plants used by farmer mainly belong to
A
Solanaceae
B
Leguminosae
C
Compositae
D
Poaceae
Question 12
Yeast is used in the production of
A
Bread and beer
B
Cheese and butter
C
Citric acid and lactic acid
D
Lipase and pectinase
Question 13
Which of the following microbes is used for commercial production of ethanol?
A
Trichoderma polysporum
B
Streptococcus
C
Clostridium butylicum
D
Saccharomyces cerevisiae
Question 14
A sewage treatment process in which a part of decomposer bacteria present in the wastes is recycled into the starting of the process is called
A
Primary treatment
B
Activated sludge treatment
C
Cyclic treatment
D
Tertiary treatment
Question 15
Crop rotation is used by farmers to increase
A
Organic content of soil
B
Nitrogenous content of soil
C
Soil fertility
D
All of these
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