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

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

4. 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

Identify the incorrectly matched pair