Select the correct pair of microorganism and the product obtained from it.

(1) Monascus purpureus - produces large holes in Swiss cheese.

(2) Saccharomyces cerevisiae - used for making wine and beer after distillation

(3) Streptococuss-produces streptokinase which is used to remove clots.

(4) Aspergillus niger - produces citric acid and butyric acid.

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 80%
From NCERT
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Which antibiotic has bactericidal effect?

(1) Erythromycin

(2) Penicillin

(3) Both 1 and 2

(4) None of these

Subtopic:  Industrial Products, Beverages & Antibiotics |
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Wine and beer are produced directly by fermentation whereas brandy and whisky require both fermentation and distillation. This is because

(1) fermentation is inhibited at an alcohol level of 10-18%

(2) distillation prolongs storage

(3) distillation improves quality

(4) distillation purifies the beverage

 

 

Subtopic:  Chemistry of Fermented Beverages |
 59%
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Select the incorrect match

(1) Citric acid - Aspergillus niger

(2) Streptokinase - Streptococcus

(3) Butyric acid - Clostridium acetobutylicum

(4) Cyclosporin-A - Monascus purpures

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 66%
From NCERT
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Which of the following antibiotics is not correctly matched with the source from which it is obtained ?

   

Antibiotic

Source

(1)

Penicillin

Penicillium chrysogenum

(2)

Bacitracin

Bacillus licheniformis

(3)

Griseofulvin 

Penicillium griseofulvum

(4)   

Streptomycin      

Bacillus griseus

Subtopic:  Industrial Products, Beverages & Antibiotics |
 52%
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The preparation and flowering of leaves of tea and tobacco is due to the activities of 

(1) Bacillus subtilis

(2) Bacillus megatherium

(3) Streptococcus lactis

(4) Acetobacter aceti

 56%
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The antibiotics have no effect on viruses because

a.   viruses show the metabolism of their own

b.   viruses are too small in size for antibiotics to act upon them

c.   viruses show no metabolism of their own

d.    viruses produce a thick covering and encyst themselves as endospores

 

Subtopic:  Industrial Products, Beverages & Antibiotics |
 56%
AIIMS - 2015
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The domestic sewage in large cities

(1) has a high BOD as it contains both aerobic and bacteria

(2) is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment plants (STPs)

(3) when treated in STPs does not really require the aeration step as the sewage contains adequate oxygen

(4) has very high amounts of suspended solids and dissolved salts

Subtopic:  Microbes in Sewage Treatment |
 61%
From NCERT
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Which one of the following useful organisms is not a part in production of curd/yoghurt?

(1) S. thermophilus

(2) Lactobacillus bulgaricus

(3) Acetobactor aceti

(4) Streptococcus lactis

Subtopic:  Microbes in Household Products |
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Which one is used/regarded as a biofertilizer?

1. An association between pteridophytes and cyanobacteria Anabaena

2. An association between gymnosperms and Nostoc

3. An association between legume and Rhizobium

4. All of the above

Subtopic:  Microbes as Biofertilizer |
 77%
From NCERT
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