The Vitamin whose content increases following the conversion of milk into curd by lactic acid bacteria is:

1. vitamin C

2. vitamin D

3. vitamin B12

4. vitamin E

Subtopic:  Microbes in Household Products |
 98%
From NCERT
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Waste water treatment generates a large quantity of sludge, which can be treated by

1. anaerobic digesters

2. floc

3. chemicals

4. oxidation pond

Subtopic:  Microbes in Sewage Treatment |
 82%
From NCERT
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Methanogenic bacteria are not found in

1. rumen of cattle

2. gobar gas plant

3. bottom of water-logged paddy fields

4. activated sludge

Subtopic:  Microbes in Sewage Treatment |
From NCERT
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Match the following column of bacteria and their commercially important products.

Column l

Column ll

A Aspergillus niger 1 Lactic acid
B Acetobacter aceti 2 Butyric acid
C Clostridium butylicum 3 Acetic acid
D Lactobacillus 4 Citric acid


Codes

A B C D
(1)  2   3   4   1 
(2)  2  4  3  1
(3)  4  3  2  1
(4)  4  1  3  2
Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 96%
From NCERT
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Match the following column of bioactive substances and their roles.

Column l

(Bioactive Substance)

Column ll

(Role)

A.

Stain 

1.

Removal of oil stains

B.

Cyclosporin A

2.

Removal of clots from blood vessels

C.

Streptokinase

3.

Lowering of blood cholesterol

D.

Lipase

4.

lmmuno-suppressive agent


Choose the correct match 

 A  B  C  D
(1)  2  4  3  1
(2)  4  1  2  3
(3)  3  4  2  1
(4)  3  2  1  4
Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 86%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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The primary treatment of waste water involves the removal of

1. dissolved impurities

2. stable particles

3. toxic substances

4. harmful bacteria

Subtopic:  Microbes in Sewage Treatment |
 66%
From NCERT
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BOD of waste water is estimated by measuring the amount of

1. total organic matter

2. biodegradable organic matter

3. oxygen evolution

4. oxygen consumption

Subtopic:  Microbes in Sewage Treatment |
 63%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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Which one of the following alcoholic drinks is produced without distillation?

1. Wine

2. Whisky

3. Rum

4. Brandy

Subtopic:  Chemistry of Fermented Beverages |
 93%
From NCERT
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The technology of biogas production from cow dung was developed in India largely due to the efforts of

1. Gas Authority of India
2. Oil and Natural Gas Commission
3. Indian Agricultural Research Institute, Khadi and Village Industries Commission
4. Indian Oil Corporation

Subtopic:  Microbes in Production of Biogas |
 98%
From NCERT
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The free-livings 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 |
 92%
From NCERT
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