The bioactive molecule cyclosporin A is used in:
1. Whooping cough
2. Diphtheria
3. Leprosy
4. Organ-transplant patients
Cyclosporin A is produced from:
(1) Trichoderma polysporum (a fungus)
(2) Bacillus (a bacterium)
(3) Aspergillus (a fungus)
(4) All of these
The primary treatment of sewage involves:
1. Digestion
2. Decomposition
3. Sedimentation and filtration
4. None of these
The amount of oxygen required by the microbes in the decomposition of organic matter is called:
1. Chemical oxygen demand
2. Biochemical oxygen demand
3. Total oxygen demand
4. Dissolve oxygen
The mixture of gases released during anaerobic digestion of sludge is called:
(1) Methane
(2) Carbon dioxide
(3) Biogas
(4) Flammable gases
Biogas contains:
(1) CO2
(2) H2S
(3) CH4
(4) All of these
The symbiotic association between fungi and roots of higher plants is called:
1. Lichen
2. Mycorrhiza
3. Biofertilizer
4. BOD
The organisms which are used to enrich the nutrient quality of the soil are called:
1. Mycorrhiza
2. Biofertilizers
3. Yeast
4. Methanogens
Which of the following serve as biofertilizer in paddy fields?
(1) Bacteria
(2) Yeast
(3) Cyanobacteria (blue-green algae)
(4) Fungi
The solids which settle after primary treatment of sewage are called:
(1) Primary sludge
(2) Activated sludge
(3) Flocs
(4) Total solids