The bioactive molecule cyclosporin A is used in:

1. Whooping cough

2. Diphtheria

3. Leprosy

4. Organ-transplant patients

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 96%
From NCERT
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Cyclosporin A is produced from:

(1) Trichoderma polysporum (a fungus)

(2) Bacillus (a bacterium)

(3) Aspergillus (a fungus)

(4) All of these

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 95%
From NCERT
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The primary treatment of sewage involves:

1. Digestion

2. Decomposition

3. Sedimentation and filtration

4. None of these

Subtopic:  Microbes in Sewage Treatment |
 96%
From NCERT
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The amount of oxygen required by the microbes in the decomposition of organic matter is called:

1. Chemical oxygen demand

2. Biochemical oxygen demand

3. Total oxygen demand

4. Dissolve oxygen

Subtopic:  Microbes in Sewage Treatment |
 96%
From NCERT
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The mixture of gases released during anaerobic digestion of sludge is called:

(1) Methane

(2) Carbon dioxide

(3) Biogas

(4) Flammable gases

Subtopic:  Microbes in Production of Biogas |
 83%
From NCERT
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Biogas contains:

(1) CO2

(2) H2S

(3) CH4

(4) All of these

Subtopic:  Microbes in Production of Biogas |
 97%
From NCERT
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The symbiotic association between fungi and roots of higher plants is called:

1. Lichen

2. Mycorrhiza

3. Biofertilizer

4. BOD

Subtopic:  Microbes as Biofertilizer |
 94%
From NCERT
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The organisms which are used to enrich the nutrient quality of the soil are called:

1. Mycorrhiza

2. Biofertilizers

3. Yeast

4. Methanogens

Subtopic:  Microbes as Biofertilizer |
 85%
From NCERT
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Which of the following serve as biofertilizer in paddy fields?

(1) Bacteria

(2) Yeast

(3) Cyanobacteria (blue-green algae)

(4) Fungi

Subtopic:  Microbes as Biofertilizer |
 92%
From NCERT
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The solids which settle after primary treatment of sewage are called:

(1) Primary sludge

(2) Activated sludge

(3) Flocs

(4) Total solids

Subtopic:  Microbes in Sewage Treatment |
 73%
From NCERT
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