BOD of waste water is estimated by measuring the amount of:

(1) total inorganic matter

(2) biodegradable organic matter

(3) oxygen evolution

(4) oxygen consumption.

Subtopic:  Microbes in Sewage Treatment |
 59%
From NCERT
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The free-living fungus Trichoderma can be used for:

1. killing insects

2. biological control of plant diseases

3. controlling butterfly caterpillars

4. producing antibiotics

Subtopic:  Microbes in Biocontrol Agent |
 77%
From NCERT
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The primary treatment of waste water involved the removal of:

(1) dissolved impurities

(2) stable substances

(3) toxic substances

(4) harmful bacteria.

Subtopic:  Microbes in Sewage Treatment |
 52%
From NCERT
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Identify the incrrectly matched pair:

1. Trichoderma harzianum -  Biocontrol

2. Aspergillus niger  - source of citric acid

3. Baculovirus - narrow spectrum species specific insecticides

4. Monascus purpureus - source of cholesterol synthesizing enzyme

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 55%
From NCERT
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Identify the incorrectly matched pair 

1.

Baculoviruses

 Species specific, broad spectrum insecticides

2.

Trichoderma

Free living fungi common in root ecosystems

3.

Ladybird

Biocontrol of aphids

4.

Organic farming

Pests kept at manageable levels rather than completely eradicated

Subtopic:  Microbes in Biocontrol Agent |
 69%
From NCERT
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Identify the incorrect matched pair:

1. Trichoderma harzianum: Cyclosporin A

2. Monascus purpureus: Statins

3. Aspergillus niger: Citric acid

4. Streptococcus pyogenes: Clot buster

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 71%
From NCERT
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Identify the incorrectly matched pair:

1

Streptococcus

Clot buster

2.

Monascus purpureus

Statins

3.

Trichoderma harziamum

Immunosuppressant

4.

Aspergillus niger

Citric acid

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 84%
From NCERT
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Baculoviruses are:

1. Species specific, narrow spectrum insecticides

2. Species specific, broad spectrum insecticides

3. Non specific, narrow spectrum inseticides

4. Non specific, broad spectrum insecticides

Subtopic:  Microbes in Biocontrol Agent |
 85%
From NCERT
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Gases found in biogas are:
1. Carbon dioxide is the only gas
2. Methane is the only gas
3. Carbon dioxide, hydrogen sulphide and Methane
4. Carbon dioxide, hydrogen cyanide and Methane

Subtopic:  Microbes in Production of Biogas |
 92%
From NCERT
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In the given diagram the gas X can be :

1. Hydrogen

2. Carbon monoxide

3. Ammonia

4. Oxygen

Subtopic:  Microbes in Production of Biogas |
 78%
From NCERT
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