Microbes in Human Welfare MCQs | Microbes in Human Welfare Short Questions and Answers

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Questions
1 What does a high value of BOD(Biochemical Oxygen Demand) indicate?
A That water is pure
B that water is less polluted
C that water is highly polluted
D that consumption of organic matter by microbes is higher in the water

Answer:that water is highly polluted
2 This is a good producer of citric acid
A Aspergillus
B Clostridium
C Saccharomyces
D Pseudomonas

Answer: Aspergillus
3 This is not an example of performing biological control of diseases/pests using microbes
A Trichoderma sp. against some plant pathogens
B Nucleopolyhedrovirus against insects and other arthropods
C Ladybird beetle against aphids
D Bt-cotton to increase yield

Answer:Bt-cotton to increase yield
4 This is chiefly produced by the activity of an anaerobic bacteria on sewage
A Laughing gas
B Propane
C Mustard gas
D Marsh gas

Answer:Marsh gas
5 For the production of ethanol, the most common substrate used in distilleries is
A Soya meal
B Molasses
C Ground gram
D cornmeal

Answer: Molasses
6 This is not a biofertilizer
A Agrobacterium
B Nostoc
C Rhizobium
D Mycorrhiza

Answer:Agrobacterium
7 Carbon dioxide is not released in which of the following processes?
A Lactate fermentation
B Alcoholic fermentation
C Aerobic respiration in animals
D Aerobic respiration in plants

Answer: Lactate fermentation
8 Which one is biofertilizer?
A Mycorrhiza
B N2 Fixing bacteria
C N2 Fixing cyanobacteria
D All the above

Answer:All the above
9 Which one is wrongly matched?
A Streptomyces- Antibiotics
B Coliform- Vinegar
C Methanogens- Gobar gas
D Yeast- Ethanol

Answer:Coliform- Vinegar
10 Highest number of antibiotics are produced by:
A Streptomyces
B Bacillus
C Penicillium
D Cephalosporium

Answer:Cephalosporium
11 One of the following is not a biofertiliser:
A Azotobacter
B Bacillus thuringiensis
C Clostridium
D Azolla

Answer:Bacillus thuringiensis
12 Secondary sewage treatment is mainly a :
A Chemical process
B Biological process
C Physical process
D Mechanical process

Answer: Biological process
13 “Bt” toxin is :
A Intracellular lipid
B Intracellular crystalline protein
C Extra cellular crystalline protein
D Lipid

Answer:Intracellular crystalline protein
14 Spirulina is:
A Biofertilizer
B Biopesticide
C Edible fungus
D Single cell protein

Answer: Single cell protein

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