Microorganisms are used during which stage of the purification of the sewage water?
(1) Primary treatment
(2) Secondary treatment
(3) None of the above
(4) Both (1) and (2)
Difficulty Level:
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.
Difficulty Level:
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
Difficulty Level:
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
Difficulty Level:
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
Difficulty Level:
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
Difficulty Level:
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
Difficulty Level:
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.
Difficulty Level:
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
Difficulty Level:
The primary treatment of waste water involved the removal of:
(1) dissolved impurities
(2) stable substances
(3) toxic substances
(4) harmful bacteria.
Difficulty Level:
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