21.
Which of the following is a commercial blood cholesterol lowering agent?
A
Cyclosporin $$A$$
B
Statin
C
Streptokinase
D
Lipases
Answer :
Statin
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22.
The term antibiotic was first used by
A
Flemming
B
Pasteur
C
Waksman
D
Lister
Answer :
Waksman
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23.
During sewage treatment, biogases are produced which include :
A
methane, oxygen, hydrogen sulphide
B
hydrogen sulphide, methane, sulphur dioxide
C
hydrogen sulphide, nitrogen, methane
D
methane, hydrogen sulphide, carbon dioxide
Answer :
methane, hydrogen sulphide, carbon dioxide
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24.
Microbe used for biocontrol of pest butterfly caterpillars is
A
Trichoderma sp
B
Saccharomyces cerevisiae
C
Bacillus thuringiensis
D
Streptococcus sp
Answer :
Bacillus thuringiensis
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25.
Which one of the following is non-symbiotic biofertilizer?
A
Azotobacter
B
Anabaena
C
Rhizobium
D
VAM
Answer :
Azotobacter
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26.
Select the correct group of biocontrol agents.
A
Bacillus thuringiensis, Tobacco mosaic virus, Aphids
B
Trichoderma, Baculovirus, Bacillus thuringiensis
C
Oscillatoria, Rhizobium, Trichoderma
D
Nostoc, Azospirillium, Nucleopolyhedrovirus
Answer :
Trichoderma, Baculovirus, Bacillus thuringiensis
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27.
Monascus purpureus is a yeast used commercially in the production of :
A
ethanol
B
streptokinase for removing clots from the blood vessels
C
citric acid
D
blood cholesterol lowering statins
Answer :
blood cholesterol lowering statins
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28.
The guts of cow and buffalo possess:
A
Chlorella spp.
B
Methanogens
C
Cyanobacteria
D
Fucus spp.
Answer :
Methanogens
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29.
Dough kept overnight in warm weather becomes soft and spongy because of
A
absorption of carbon dioxide from atmosphehre
B
fermentation
C
cohesion
D
osmosis
Answer :
fermentation
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30.
The domestic sewage in large cities
A
has a high BOD as it contains both aerobic and anaerobic bacteria
B
is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs)
C
when treated in STPs does not really require the aeration step as the sewage contains adequate oxygen
D
has very high amounts of suspended solids and dissolved salts
Answer :
is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs)
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