Match the following list of microbes and what they are used for:

1. A-3, B-4, C-1, D-2

2. A-4, B-3, C-2, D-1

3. A-4, B-2, C-1, D-3

4. A-3, B-1, C-4, D-2

A high value of BOD (Biochemical Oxygen Demand) indicates that:

What gases are produced in anaerobic sludge digesters?

1. Methane and CO₂
2. Methane, Hydrogen Sulphide and CO₂
3. Methane, Hydrogen Sulphide and CO
4. Hydrogen Sulphide and CO₂

A good producer of citric acid is:

1. Pseudomonas

2. Clostridium

3. Saccharomyces

4. Aspergillus

Measuring Biochemical Oxygen Demand (BOD) is a method used for:

A patient brought to a hospital with myocardial infarction is normally immediately given:

Which one of the following microbes forms a symbiotic association with plants and helps them in their nutrition?

1. Azotobacter

2. Aspergillus

3. Glomus

4. Trichoderma

Yeast is used in the production of:

1. Citric acid and lactic acid

2. Lipase and pectinase

3. Bread and beer

4. Cheese and butter

Which one of the following is an example of carrying out biological control of pests/diseases using microbes?

1. Trichoderma sp. against certain plant pathogens

2. Nucleopolyhedrovirus against white rust in Brassica

3. Bt-cotton to increase cotton yield

4. Ladybird beetle against aphids in mustard