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.

Match the items in column 'A' and Column 'B' and choose correct answer. 

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

Match the following list of bioactive substances and their roles:

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

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

Match the following list of bacteria and their commercially important products:

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

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

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.

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

The primary treatment of waste water involved the removal of:

(1) dissolved impurities

(2) stable substances

(3) toxic substances

(4) harmful bacteria.

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