A major component of gobar gas is :

1. Butane

2. Ammonia

3. Methane

4. Ethane

Which of the following is not used as a biofertilizers :

1. Rhizobium

2. Fungi-Glomus

3. Cyano bacteria

4. Yeast

Which of the following is one of the most significant discoveries of the twentieth century that greatly contributed towards the welfare of human society?

1. Biogas

2. Curd

3. Penicillin

4. Citric acid

Assertion : Dragonflies are useful to get rid of mosquitoes

Reason : Baculoviruses are pathogens that attack insects and other arthropods.

Blood-cholesterol lowering agent is and produced by

1.  Statins, Monascus purpureus

2.  Statins, Trichoderma polysporum

3.  Cyclosporin A, Streptococcus

4.  Streptokinase, Streptococcus

During secondary treatment, major part of activated sludge is pumped into tanks called

1.  Aerobic sludge digesters.

2.  Anaerobic sludge digesters.

3.  Primary sludge digesters.

4.  Settling tanks.

To obtain microbial product at industrial scale which equipment is used.

1. Auto clave.

2. Fermentors.

3. Laminar flow.

4. Phytotron.

In STP

1. Primary treatment is a biological process.

2. Flocs are anaerobic and autotrophic microbes.

3. BOD measures the organic matter present in the water.

4. Activated sludge is the effluent of tertiary treatment.

The microbial biocontrol agent with species-specific narrow spectrum insecticidal application is

1. Trichoderma 

2. Glomus

3. Dragonflies 

4. Nucleopolyhedrovirus

Which of the following alcoholic drinks are produced by distillation of the fermented broth:
1. Beer and wine

2. Whisky, brandy, rum

3. Beer and rum

4. Wine and brandy