Select the correct statement from the following:

1.	Biogas is produced by the activity of aerobic bacteria on animal waste
2.	Methanobacterium is an aerobic bacterium found in the rumen of cattle
3.	Biogas, commonly called gobar gas, is pure methane
4.	Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria

A common biocontrol agent for the control of plant diseases is:

1. Baculovirus

2. Bacillus thuringiensis

3. Glomus

4. Trichoderma

The common nitrogen-fixer in paddy fields is:

1. Rhizobium

2. Azospirillum

3. Oscillatoria

4. Frankia

Which one of the following is not used in organic farming?

1. Glomus

2. Earthworm

3. Oscillatoria

4. Snail

Which of the following plants you would select for the production of bioethanol?

1. Brassica

2. Zea mays

3. Pongamia

4. jatropha

Which of the following is not used as a biopesticide?

1. Bacillus thuringiensis

2. Trichoderma harzianum

3. Nucleopolyhedrovirus(NPV)

4. Xanthomonas campestris

Which one of the following pairs is wrongly matched?

1. Detergents-Lipase

2. Alcohol-Nitrogenase

3. Fruit juice-Pectinase

4. Textile-Amylase