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Online Microbiology Test - Microbiology Test - Random

Instruction:
  • This is a FREE online test. Beware of scammers who ask for money to attend this test.
  • Total number of questions: 20.
  • Time allotted: 30 minutes.
  • Each question carries 1 mark; there are no negative marks.
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  • All the best!

Marks : 2/20

Total number of questions
20
Number of answered questions
0
Number of unanswered questions
20
Test Review : View answers and explanation for this test.
1.
Single or clusters of flagella at both poles is known as
monotrichous
petritrichous
amphitrichous
none of these
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Learn more problems on : Bacteria Morphology
2.
Radical shifts in pH can be prevented by incorporating
a buffer
an oxidizing agent
a reducing agent
any of these
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Learn more problems on : Cell Cultivations
3.
Organisms such as lactobacilli that have elaborate requirements for specific nutrients i.e. vitamins and other growth promoting substances, are generally called as
fastidious hetrotrophs
chemo-lithotrophs
chemotrophs
photo-organotrophs
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Learn more problems on : Growth and Nutrition of Bacteria
4.
Standard free energy change (ΔG) can be expressed as
ΔG° = -RTlnkeq
ΔG° = RTlnkeq
ΔG° = R/Tlnkeq
ΔG° = -RT/lnkeq
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Learn more problems on : Microbial Metabolism
5.
The enzyme that catalyzes the synthesis of DNA is called
DNA polymerase
DNA gyrase
DNA ligase
helicase
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Learn more problems on : DNA Replication
6.
Which of the following statement defines a replicon?
A DNA molecule that encodes pili for conjugation
A DNA molecule that is able to replicate and be maintained
A DNA template which is used in transcription
The enzyme responsible for transposition
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Learn more problems on : Transcription
7.
Quellung reaction is used for typing of
Klebsiella pneumoniae
Streptococcus pneumoniae
Both (a) and (b)
None of these
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Learn more problems on : Antigen Antibody Reaction
8.
Induction of tolerance mechanism(s) is/are
suppression
clonal deletion
clonal anergy
all of these
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Learn more problems on : Immune Response
9.
Which of the following is an example of autoimmune disease?
Rheumatoid arthritis
Systemic lupus erythematosus
Polyarteritis nodosa
All of the above
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Learn more problems on : Immune Response
10.
Members of the Protozoa may motile by all of the following methods except
flagella
gliding by slime secretion
cilia
pseudopodia
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Learn more problems on : Protozon
11.
Which algal division never produces motile, flagellated cells among any of its members?
Chlorophyta
Chrysophyta
Phaeophyta
Rhodophyta
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Learn more problems on : Algae
12.
Media containing spores and thermolabile constituents are sterilized by
pasteurization
UV radiation
dry heat
tyndalization
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Learn more problems on : Physical and Chemical Agents
13.
Polyene antibiotics are
large ring structures
β-lactam - thiazolidine ring
small ring structures
any of these
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Learn more problems on : Antimicrobial Chemotherapeutic Agents
14.
Quinolones are
antimetabolites
penicillin derivatives
bacteriostatic
broad-spectrum
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Learn more problems on : Antimicrobial Chemotherapeutic Agents
15.
Which of the following is generally not referred to the sewerage system?
Sanitary sewers
Storm sewers
Combined sewers
Solid sewers
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Learn more problems on : Microbiology of Waste Water
16.
The death of a river by environmental pollutants ultimately results from
the overpopulation of algae
the overabundance of toxic proteins
the depletion of oxygen
the buildup of sediment on the river bottom
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Learn more problems on : Microbiology of Waste Water
17.
Most productive species among the different vitamin B12 producing Pseudomonads is
P. denitrificans
P. ovalis
P. aureofaciens
none of these
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Learn more problems on : Industrially Useful Microbial Processes
18.
Which of the following is true about ISO 2002 method for Salmonella detection?
Selenite cystine (SC) broth is replaced by Muller Kauffmann tetrathionate novobiocin broth (MKTTn)
Rappaport Vassiliadis (RV) broth has been replaced by Rappaport Vassiliadis Soya (RVS) broth
XLD is the first isolation medium rather than BGA
All of these
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Learn more problems on : Microbiology of Foods
19.
Under what conditions food poisoning bacteria may grow and produce toxins in vegetables?
When thawed vegetables are held at refrigerated temperature for any considerable period
When thawed vegetables are held at room temperature for any considerable period
When thawed vegetables are held below refrigerated temperature for any considerable period
None of the above
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Learn more problems on : Fruits and Vegetables
20.
The bacteria most often involved in the spoilage of fish are
part of the natural flora of the external slime of fishes and their intestinal contents
part of the natural flora of the internal slime of fishes only
both (a) and (b)
none of the above
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Learn more problems on : Fish and Sea Foods
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