Download PDF
Free download in PDF Microbes in Human Welfare Short Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries./p>
(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
(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
(5)
For the production of ethanol, the most common substrate used in distilleries is
[A]
Soya meal
[B]
Molasses
[C]
Ground gram
[D]
cornmeal
(6)
This is not a biofertilizer
[A]
Agrobacterium
[B]
Nostoc
[C]
Rhizobium
[D]
Mycorrhiza
(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
(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
(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
Take Mock Tests