What gases are produced in anaerobic sludge digesters?

1. Methane and CO2 only

2. Methane, Hydrogen sulphide and CO2

3. Methane, hydrogen sulphide and O2

4. Hydrogen sulphide and CO2

Subtopic:  Microbes in Sewage Treatment |
 91%
From NCERT
NEET - 2014
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A good producer of citric acid is

1. Aspergillus

2. Pseudomonas

3. Clostridium

4. Saccharomyces

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 96%
From NCERT
NEET - 2013
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Monascus purpureus is a yeast used commercially in the production of

(1) ethanol

(2) streptokinase for removing clots from the blood vessels.

(3) citric acid

(4) blood cholesterol lowering statins.

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 87%
From NCERT
NEET - 2012
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A patient brought to a hospital with myocardial infarction is normally immediately given

1. penicillin                         

2. streptokinase

3. cyclosporin-A                   

4. statins

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 68%
From NCERT
NEET - 2012
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Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition?

(1) Azotobacter

(2) Aspergillus

(3) Glomus

(4) Trichoderma

Subtopic:  Microbes as Biofertilizer |
 70%
From NCERT
NEET - 2012
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Yeast is used in the production of

(1) citric acid and lactic acid

(2) lipase and pectinase

(3) bread and beer

(4) cheese and butter

Subtopic:  Chemistry of Fermented Beverages | Microbes in Household Products |
 91%
From NCERT
NEET - 2012
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Which one of the following helps in absorption of phosphorus from soil by plants?

1. Rhizobium

2. Anabaena

3. Frankia

4. Glomus

Subtopic:  Microbes as Biofertilizer |
 70%
From NCERT
NEET - 2011
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Secondary sewage treatment is mainly a

(1) mechanical process

(2) chemical process

(3) biological process

(4) physical process

Subtopic:  Microbes in Sewage Treatment |
 84%
From NCERT
NEET - 2011
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The most common substrate used in distilleries for the production of ethanol is

(1) soya meal

(2) ground gram

(3) molasses

(4) corn meal

Subtopic:  Industrial Products, Beverages & Antibiotics | Chemistry of Fermented Beverages |
 72%
NEET - 2011
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Select the correct statement from the following

(1) Biogas is produced by the activity of aerobic bacteria on animal waste

(2) Methanobacterium is an aerobic bacterium found in rumen of cattle.

(3) Biogas, commonly called gobar gas, is pure methane

(4) Activated sludge-sediment in settlement tanks of sewage treatment plant is a right source of aerobic bacteria

Subtopic:  Microbes in Sewage Treatment |
 55%
From NCERT
NEET - 2010
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