Big holes in Swiss cheese are made by a:

(1) a machine

(2) a bacterium that produces methane gas

(3) a bacterium producing a large amount of carbon dioxide

(4) a fungus that releases a lot of gases during its metabolic activites.

Subtopic:  Microbes in Household Products |
 95%
From NCERT
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Match the items in column 'A' and Column 'B' and choose correct answer. 

 

Column A

 

Column B

(i)

Lady Bird

(a)

Menthano bacterium

(ii)

Mycorrhiza

(b)  

Trichoderma

(iii)   

Biological control      

(c)

Aphids

(iv)  

Biogas                    

(d)

Glomus

The correct answer is:

(1) (i) - b, (ii) - d, (iii) - c, (iv) - a

(2) (i) - c, (ii) - d, (iii) - b, (iv) - a

(3) (i) - d, (ii) - a, (iii) - b, (iv) - c

(4) (i) - c, (ii) - b, (iii) - a, (iv) - d

Subtopic:  Microbes in Production of Biogas | Microbes in Biocontrol Agent |
 92%
From NCERT
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Match the following list of bioactive substances and their roles:

 

Bioactive substance  

 

Role

(i)

Statin

(a)

Removal of oil stains

(ii)

Cyclosporin

(b)

Removal of clots from blood vessels

(iii)

Streptokinase

(c)

Lowering of blood cholesterol

(iv)  

Lipase

(d)  

Immuno-suppressive agent

Choose the correct match:

(1) (i) - b, (ii) - c, (iii) - a, (iv) - d

(2) (i) - d, (ii) - b, (iii) - a, (iv) - c

(3) (i) - d, (ii) - a, (iii) - d, (iv) - c

(4) (i) - c, (ii) - d, (iii) - b, (iv) - a

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 94%
From NCERT
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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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Match the following list of bacteria and their commercially important products:

 

Bacterium

 

Product

(i)

Aspergullus niger

(a)

Lactic acid

(ii)

Acetobacter aceti

(b)

Butyric acid

(iii)

Clostridium Butylicum   

(c)

Acetic acid

(iv)   

Lactobacillus

(d)   

Citric Acid

Choose the correct match:

(1) (i) - b, (ii) - c, (iii) - d, (iv) - a

(2) (i) - b, (ii) - d, (iii) - c, (iv) - a

(3) (i) - d, (ii) - c, (iii) - b, (iv) - a

(4) (i) - d, (ii) - a, (iii) - c, (iv) - b

Subtopic:  Microbes in Household Products |
 95%
From NCERT
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The residue left after methane production from cattle dung is:

(1) burnt

(2) burried in land fills

(3) used as manure

(3) used in civil construction

Subtopic:  Microbes in Production of Biogas |
 93%
From NCERT
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BOD of waste water is estimated by measuring the amount of:

(1) total inorganic matter

(2) biodegradable organic matter

(3) oxygen evolution

(4) oxygen consumption.

Subtopic:  Microbes in Sewage Treatment |
 63%
From NCERT
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The free-living 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 |
 87%
From NCERT
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The primary treatment of waste water involved the removal of:

(1) dissolved impurities

(2) stable substances

(3) toxic substances

(4) harmful bacteria.

Subtopic:  Microbes in Sewage Treatment |
 61%
From NCERT
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Identify the incrrectly matched pair:

(1) Trichoderma harzianum -  Biocontrol

(2) Aspergillus niger  - source of citric acid

(3) Baculovirus - narrow spectrum species specific insecticides

(4) Monascus purpureus - source of cholesterol synthesizing enzyme

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 67%
From NCERT
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