Which of the following option is not true for penicillin?

1.	Its full potential as an effective antibiotic was established much later by Ernest Chain and Howard Florey.
2.	This antibiotic was extensively used to treat American soldiers wounded in World War II.
3.	Produced by the bacteria.
4.	both 2 and 3

Monascus purpureus is a

i. Bacteria                           
ii. Yeast
iii. Produces cyclosporin A     
iv. Produces statins

1. i, iii

2. ii, iii

3. i, iv

4. ii, iv

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)

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.

Pathogens of Arthropods effectively used as biological control agents include

1. Trichoderma

2. Baculoviruses

3. Agrobacterium tumefaciens

4. E. Col

Among the following pairs of microbes, which pair has both the microbes that can be used as biofertilizers?

1. Aspergillus and Rhizopus

2. Rhizobium and Rhizopus

3. Cyanobacteria and Rhizobium

4. Aspergillus and Cyanobacteria

Which of the following statements about methanogens is not correct?

For a biocontrol agent to be part of an integrated pest management, it should be:

1. species-specific and symbiotic

2. free living and broad spectrum

3. narrow spectrum and symbiotic

4. species-specific and inactive on non-target organisms

Find incorrect statement/s with respect to sewage treatment
(a) Primary treatment involves filtration and sedimentation of activated sludge
(b) ‘Flocs’ refers to masses of aerobic bacteria associated with fungal filaments to form mesh like structures
(c) Aerobic treatment continues till the BOD is reduced
(d) Aerobic bacteria kill other kind of bacteria and fungi present in the activated sludge

1. (b) & (d)
2. (a) & (c)
3. (b) & (c)
4. (a) & (d)

Find out which one of the following statement is not correct with respect to gobar-gas plant?
1. It has a floating cover which keeps on rising as gas is produced
2. It is developed by IARI and KVIC
3. Main gas produced is butane, isobutene & propane
4. Spent slurry may be used as fertilizer