Microbes in Human Welfare MCQs | Microbes in Human Welfare Objective Type Questions and Answers

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Questions
1 Which one is useful as a immunosuppresive agent in organ transplant ?
A All the given
B Cyclosporin-A
C Cyclosporin-L
D Cyclosprin-C

Answer:Cyclosporin-A
2 IARI means
A Indian Agriculture Research Institute
B International Agrochemical Research Institute
C Indian Agrochemical Research Institute
D Indian Agriculture Resource Institute

Answer:Indian Agriculture Research Institute
3 Which group is true for the Enzymes of micro organism ?
A Amylase, Protease, Lipase, Protease
B Glycin, Renin, Lipase, Melic Acid
C Lipase, Protease, Lipase, Amylase
D Glyconic acid, protease, Lipase, Amylose

Answer: Lipase, Protease, Lipase, Amylase
4 Which of these processes does not give off CO2?
A Lactate fermentation
B Aerobic respiration
C Alcoholic fermentation
D None of the above

Answer:Lactate fermentation
5 High biological oxygen demand in a water body means ________
A Water is not polluted
B Water is polluted
C Waterbody contains lots of lifeforms
D None of the above

Answer: Water is polluted
6 The guts of various ruminants contain _________
A Acidophiles
B Halophiles
C Mental retardation
D All of the above

Answer:Methanogens
7 Which of the following microbes are used for the commercial production of citric acid?
A Xanthomonas citri
B Asparagine
C Asparagus
D Aspergillus

Answer:Aspergillus
8 Saccharomyces cerevisiae is used primarily for
A Baking
B Bleaching
C Biofuel
D None of the above

Answer:Baking
9 Acinetobacter baumannii is a _________
A Decomposing bacteria
B Pathogenic bacteria
C Nitrogen-fixing bacteria
D None of the above

Answer: Pathogenic bacteria
10 Ethanol can be produced using __________
A Saccharomyces cerevisiae
B Escherichia coli
C Pseudomonas syringae
D None of the above

Answer:Saccharomyces cerevisiae
11 Bacillus thuringiensis is used for
A Fermentation of beer
B Biopesticide
C Antibiotic
D None of the above

Answer: Biopesticide
12 Before antibiotics, the first commercial antibacterial available was _____
A Penicillin
B Prontosil
C Azithromycin
D None of the above

Answer: Prontosil
13 Example of a natural insect repellant
A Citronella oil
B Coconut oil
C Linseed oil
D None of the above

Answer: Citronella oil
14 Why is wine distilled?
A To reduce toxicity
B To enable fermentation
C To prevent spoilage
D To increase the alcohol percentage

Answer: To prevent spoilage
15 Which of the following is used as a substrate for alcohol fermentation?
A Maize
B Barley
C Sucrose
D None of the above

Answer:Sucrose
16 Antibiotics are the most effective on:
A Bacteria
B Virus
C Fungi
D None of the above

Answer: Bacteria
17 ____________ is a pigment that gives a pinkish hue to rhizobium induced root nodules.
A Leghaemoglobin
B Carotenoid
C Mauveine
D None of the above

Answer:Leghaemoglobin
18 Bacillus thuringiensis is widely used as:
A Insecticide
B Weedicides
C Rodenticide
D None of the above

Answer: Insecticide
19 In Swiss cheese, big holes are made by a
A bacterium producing methane gas
B machine
C fungus releasing a lot of gases while its metabolic activities
D bacterium producing large quantities of carbon dioxide

Answer:bacterium producing large quantities of carbon dioxide
20 During which stage of the purification of the sewage water are microbes used?
A Primary treatment
B Secondary treatment
C Tertiary treatment
D Both (1) and (2)

Answer: Secondary treatment

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