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

1. Streptococci

2. Streptobacilli

3. Staphylobacilli

4. Staphylococci

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

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

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

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

Pathogens of Arthropods effectively used as biological control agents include

1. Trichoderma

2. Baculoviruses

3. Agrobacterium tumefaciens

4. E. Col

Which is not correct about methanogens?

1. they are archaebacteria

2. they live in marshy areas

3. Methane is their preferred carbon source

4. They are present in guts of several ruminant animals (cow, buffaloes) and they produce biogas (CH${}_4$) from the dung of these animals.

Read the following four statements (1 – 4), find out certain mistakes in two of them.

Which of the two statements given above are not correct?

1. Statements (1) and (2)

2. Statement (1) and (3)

3. Statement (2) and (3)

4. Statements (2) and (4)