Biological control agent is obtained from:-

1. Bacillus thruingiensis

2. Monascus purpureus

3. Streptococcus

4. Aspergillus niger

Filteration and sedimentation are the components of -

1. Primary treatment 

2. Secondary treatment

3. Tertiary treatment

4. Quaternary treatment

Match the following column correctly

               Column-I                   Column-II
(A) Aspergillus niger                (i) Ethanol
(B) Clostridium butylicum         (ii) Statins
(C) Saccharomyces cerevisiae  (iii) Citric acid
(D) Trichoderma polysporum   (iv) Butyric acid
(E) Monascus purpureus          (v) Cyclosporin-A

1. A-iv, B-iii, C-i, D-v, E-ii

2. A-ii, B-v, C-i, D-iii, E-iv

3. A-iii, B-iv, C-i, D-v, E-ii

4. A-v, B-iv, C-i, D-iii, E-ii

During sewage treatment when the BOD is reduced significantly, the effluent is passed to the

1. Large aeration tank to form flocs

2. Primary settling tank to remove primary sludge

3. Secondary settling tank to sediment the flocs

4. Anaerobic sludge digester  

Which of the following cannot be a biofertiliser?

1. Cyanobacteria

2. Fungi

3. Viruses

4. Bacteria

Find out which one of the following statement is not correct with respect to biogas plant?

1. It has a floating cover which keeps on rising as gas is produced

2. It consists of a 10-15 feet deep tank in which bio-wastes are collected and a slurry of dung is fed

3. Main gases produced are methane, isobutane and propane

4. Spent slurry may be used as fertiliser

Alexander Fleming accidently discovered antibiotic penicillin from a mould, but he was working on

1. Streptococci

2. Streptobacilli

3. Staphylobacilli

4. Staphylococci

The technology of biogas production in india was

1 Imported from Japan

2 Imported from Denmark

3 Imported from USA

4 Developed in India due to efforts of IARI and KVIC

In the STPs, biological process of microbial degradation of organic matter involves

1 Utilisation of activated sludge as inoculant produced in the physical process

2 Mainly involves anaerobic breakdown of organic matter

3 Masses of unicellular bacteria entangled in filamentous bacterial forms represent flocs

4 BOD is greatly reduced by the microbial activity

Pathogens of Arthropods effectively used as biological control agents include

1. Trichoderma

2. Baculoviruses

3. Agrobacterium tumefaciens

4. E. Col