Microbe used for biocontrol of pest butterfly caterpillars is

1. Bacillus thuringiensis.

2. Streptococcus species

3. Trichoderma species

4. Saccharomyces cerevisiae

Subtopic:  Microbes in Biocontrol Agent |
 92%
From NCERT
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A biofertilizer is

1. Cyanobacterium Anabaena in cavities of Azolla leaves.

2. Symbiotic association of Azotobacter for fixing atmospheric nitrogen.

3.Farmyard manure.

4.Green manure

Subtopic:  Microbes as Biofertilizer |
From NCERT
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Flocs is

1. Primary sludge produced in sewage treatment.

2.A type of biofortified food.

3. A mesh like structure formed by association of bacteria and fungal filaments in sewage
treatment.

4. The effluent in primary treatment tank obtained during sewage treatment

Subtopic:  Microbes in Sewage Treatment |
 91%
From NCERT
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Identify the set which has all organisms used in biological control of pests

1. Trichoderma, Nucleopolyhedro virus, Bacillus thuringiensis, Lady Bird (Lady Bug) beetle.
2. Dragon flies, Bacillus thuringiensis, Lady Bird, Aphids.
3. Lady Bird, Penicillium, Baculovirus, Aspergillus.
4. Trichoderma, Aspergillus, Bacillus thuringiensis, Nucleopolyhedro virus.
Subtopic:  Microbes in Biocontrol Agent |
 80%
From NCERT
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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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