NEET Botany Microbes in Human Welfare Questions Solved


Microorganisms are used during which stage of the purification of the sewage water?

(1) Primary treatment

(2) Secondary treatment

(3) Tertiary treatment

(4) Both (1) and (2)

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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.

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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

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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

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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

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Which one of the following alcoholic drinks is produced without distillation?

(1) Wine

(2) Whisky

(3) Rum

(4) Brandy

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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

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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

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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.

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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

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