What gases are produced in anaerobic sludge digesters?
1. Methane and CO2
2. Methane, Hydrogen Sulphide and CO2
3. Methane, Hydrogen Sulphide and CO
4. Hydrogen Sulphide and CO2
A good producer of citric acid is:
1. Pseudomonas
2. Clostridium
3. Saccharomyces
4. Aspergillus
Measuring Biochemical Oxygen Demand (BOD) is a method used for:
1. | Estimating the amount of organic matter in sewage water |
2. | Working out the efficiency of oil-driven automobile engines |
3. | Measuring the activity of Saccharomyces cerevisiae in producing curd on a commercial scale |
4. | Working out the efficiency of RBCs about their capacity to carry oxygen |
Monascus purpureus is the yeast used commercially in the production of:
1. | Ethanol |
2. | Streptokinase for removing clots from the blood vessels |
3. | Citric acid |
4. | Blood cholesterol-lowering statins |
A patient brought to a hospital with myocardial infarction is normally immediately given:
1. | penicillin | 2. | streptokinase |
3. | cyclosporin-A | 4. | statins |
Which one of the following microbes forms a symbiotic association with plants and helps them in their nutrition?
1. Azotobacter
2. Aspergillus
3. Glomus
4. Trichoderma
Yeast is used in the production of:
1. Citric acid and lactic acid
2. Lipase and pectinase
3. Bread and beer
4. Cheese and butter
A nitrogen-fixing microbe associated with Azolla in rice fields is:
1. Spirulina
2. Anabaena
3. Frankia
4. Tolypothrix
Which one of the following is an example of carrying out biological control of pests/diseases using microbes?
1. Trichoderma sp. against certain plant pathogens
2. Nucleopolyhedrovirus against white rust in Brassica
3. Bt-cotton to increase cotton yield
4. Ladybird beetle against aphids in mustard