Ernest Chain and Howard Florey’s contribution was

1. Discovery of streptokinase.

2. Establishment of potential of penicillin as effective drug.

3. Discovery of DNA sequences.

4. Isolating the bacterial plasmid.

Subtopic:  Industrial Products, Beverages & Antibiotics |
 95%
From NCERT
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Conversion of milk to curd improves its nutritional value by increasing the amount of

1. Vitamin D

2. Vitamin A

3. Vitamin B12 

4. Vitamin E

 

Subtopic:  Microbes in Household Products |
 99%
From NCERT
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Which of the following alcoholic drinks are produced by distillation of the fermented broth:
1. Beer and wine

2. Whisky, brandy, rum

3. Beer and rum

4. Wine and brandy

Subtopic:  Chemistry of Fermented Beverages |
 90%
From NCERT
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A major component of gobar gas is :

1. Butane

2. Ammonia

3. Methane

4. Ethane

Subtopic:  Microbes in Production of Biogas |
 98%
From NCERT
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Which of the following is not used as a biofertilizers :

1. Rhizobium

2. Fungi-Glomus

3. Cyano bacteria

4. Yeast

Subtopic:  Microbes in Household Products |
 89%
From NCERT
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Which of the following is one of the most significant discoveries of the twentieth century that greatly contributed towards the welfare of human society?

1. Biogas

2. Curd

3. Penicillin

4. Citric acid

Subtopic:  Microbes in Household Products |
 93%
From NCERT
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Assertion : Dragonflies are useful to get rid of mosquitoes

Reason : Baculoviruses are pathogens that attack insects and other arthropods.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Microbes in Biocontrol Agent |
 79%
From NCERT
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Blood-cholesterol lowering agent is and produced by

1.  Statins, Monascus purpureus

2.  Statins, Trichoderma polysporum

3.  Cyclosporin A, Streptococcus

4.  Streptokinase, Streptococcus

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 91%
From NCERT
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During secondary treatment, major part of activated sludge is pumped into tanks called

1.  Aerobic sludge digesters.

2.  Anaerobic sludge digesters.

3.  Primary sludge digesters.

4.  Settling tanks.

Subtopic:  Microbes in Sewage Treatment |
 81%
From NCERT
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To obtain microbial product at industrial scale which equipment is used.

1. Auto clave.

2. Fermentors.

3. Laminar flow.

4. Phytotron.

Subtopic:  Industrial Products, Beverages & Antibiotics |
 96%
From NCERT
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