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Free download in PDF Microbes in Human Welfare Multiple Choice Questions (MCQS) and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries./p>
(1)
Cheese is a product of:
[A]
Distillation
[B]
Fermentation
[C]
Pasteurisation
[D]
Dehydration
(2)
Which one of the following alcoholic drinks is produced without distillation?
[A]
Wine
[B]
Whisky
[C]
Rum
[D]
Brandy
(3)
The free living fungus Trichoderma can be used for:
[A]
Killing insects
[B]
Biological control of plant diseases
[C]
Controlling butterfly caterpillars
[D]
Producing Antibiotics
Answer: Biological control of plant diseases
(4)
Which one of the following processes CO2 is not released?
[A]
Alcoholic fermentation
[B]
Lactate fermentation
[C]
Aerobic respiration in plants
[D]
Aerobic respiration in animals
Answer: Lactate fermentation
(5)
High value of B O D (Biochemical Oxygen Demand) shows
[A]
water is normal
[B]
water is highly polluted
[C]
water is less polluted
[D]
none of these
Answer: water is highly polluted
(6)
Which of the following is fermentation process?
[A]
batch process
[B]
continuous process
[C]
both a and b
[D]
none of these
(7)
Who showed that Sacchaaromyces cerevisiae causes fermentation forming products such as beer and buttermilk?
[A]
Louis Pasteur
[B]
Alexander Fleming
[C]
Selman Waksman
[D]
Schatz
(8)
Rennet is used in
[A]
bread making
[B]
fermentation
[C]
cheese making
[D]
antibiotics synthesis
(9)
Tissue plasminogen activator is
[A]
a vitamin
[B]
an Enzyme
[C]
a chemical that stimulates tissue differentiation
[D]
amino acid
(10)
A bioreactor is
[A]
hybridoma
[B]
Culture containing radioactive isotopes
[C]
Culture for synthesis of new chemicals
[D]
Fermentation tank
Answer: Fermentation tank
(11)
Humulin is
[A]
carbohydrate
[B]
protein
[C]
fat
[D]
antibiotics
(12)
Which of the following can be application of fermentation?
[A]
tanning of leather
[B]
curing of tea
[C]
production of vine
[D]
all of these
(13)
Enzyme immobilisation is
[A]
conversion of an active enzyme into inactive form
[B]
providing enzyme with protective covering
[C]
changing a soluble enzyme into insoluble state
[D]
changing pH so that enzyme is not able to carry out its function
Answer: providing enzyme with protective covering
(14)
Biogas is produced by
[A]
aeobic breakdown of biomass
[B]
anaerobic break down of biomass
[C]
with the help of methanogenic bacteria
[D]
both b and c
(15)
Name the first organic acid produced by microbial fermentation
[A]
citric acid
[B]
lactic acid
[C]
acetic acid
[D]
none of the above
(16)
The residue left after methane production from cattle dung is:
[A]
Burnt
[B]
Burried in landfills
[C]
Used as manure
[D]
Used in civil construction
Answer: Used in civil construction
(17)
Pencillin inhibits bacterial mulitiplication because it
[A]
Checks RNA synthesis
[B]
Checks DNA synthesis
[C]
Destroys chromatin
[D]
Inhibits cell wall formation
Answer: Inhibits cell wall formation
(18)
Biogas production from waste biomass with the help of methanogenic bacteria is:
[A]
Onestep process
[B]
Twostep process
[C]
Threestep process
[D]
Multistep process
Answer: Threestep process
(19)
Aquatic fern which is excellent biofertiliser:
[A]
Azolla
[B]
Salvinia
[C]
Marsilea
[D]
Pteridium
(20)
Most famous bacterial fertilizer is:
[A]
Nitrosomonas
[B]
Nitrobacter
[C]
Nitrosococcus
[D]
Rhizobium
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