Identify the set which has all organisms used in biological control of pests

1.	Trichoderma, Nucleopolyhedro virus, Bacillus thuringiensis, Lady Bird (Lady Bug) beetle.
2.	Dragon flies, Bacillus thuringiensis, Lady Bird, Aphids.
3.	Lady Bird, Penicillium, Baculovirus, Aspergillus.
4.	Trichoderma, Aspergillus, Bacillus thuringiensis, Nucleopolyhedro virus.

Ernest Chain and Howard Florey’s contribution was

1. Discovery of streptokinase.

2. Establishment of potential of penicillin as effective drug.

3. Discovery of DNA sequences.

4. Isolating the bacterial plasmid.

Conversion of milk to curd improves its nutritional value by increasing the amount of

1. Vitamin D

2. Vitamin A

3. Vitamin ${\mathrm{B}}_{12}$ 

4. Vitamin E

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

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.