Microbes In Human Welfare

Biology
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During sewage treatment, gases produced include

A
Methane, hydrogen sulphide, carbon dioxide and hydrogen.
B
Methane, oxygene and hydrogensulphide.
C
Hydrogensulphide, methane and sulphur dioxide.
D
Hydrogen sulphide, nitrogen and methane.
Hard
NEET
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Match the following columns and select the correct option.
Column-IColumn-II
(a)Clostridium butylicum(i)Cyclosporin-A 
(b)Trichoderma polysporum(ii)Butyric Acid
(c)Monascus purpureus(iii) Citric Acid
(d) Aspergillus niger(iv) Blood cholesterol-lowering agent

A
(a) - (ii), (b) - (i), (c) - (iv), (d) - (iii)
B
(a) - (i), (b) - (ii), (c) - (iv), (d) - (iii)
C
(a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
D
(a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)
Medium
NEET
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Which of the following can be used as a biocontrol agent in the treatment of plant disease?

A
Trichoderma
B
Chlorella
C
Anabaena
D
Lactobacillus
Medium
NEET
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Which of the following in sewage treatment removes suspended solids?

A
Primary treatment
B
Tertiary treatment
C
Secondary treatment
D
Sludge treatment
Medium
NEET
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A good producer of citric acid is

A
Aspergillus
B
Pseudomonas
C
Clostridium
D
Saccharomyces
Hard
NEET
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What is true about Bt toxin?

A
The concerned Bacillus has antitoxins.
B
The inactive protoxin gets converted into active form in the insect gut.
C
Bt protein exists as active toxin in the Bacillus.
D
The activated toxin enters the ovaries of the pest to sterilise it and thus prevent its multiplication.
Medium
NEET
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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
Medium
NEET
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Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?

A
Monascus purpureus - Statins
B
Acetobacter aceti - Acetic acid
C
Clostridium butylicum - Lactic acid
D
Aspergillus niger - Citric acid
Hard
NEET
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