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Online Microbiology Test - Microbiology Test 3

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.
  • DO NOT refresh the page.
  • 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.
In glycolysis, ATP is created by
photophosphorylation
the chemiosmotic mechanism
substrate level phosphorylation
the pentose phosphate pathway
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Learn more problems on : Energy Release and Conservation
2.
Cell theory includes all of the following except
all organisms are composed of one or more cells
the cell is the most primitive form of life
the cell is the structural unit of life
cells arise by division of preexisting cells
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Learn more problems on : Micro Organisms
3.
All the following are considered eukaryotes except
archaea
fungi
protozoa
humans
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Learn more problems on : Micro Organisms
4.
The common word for bacteria which are spherical in shape is
cocci
bacilli
spirilla
pleomorphic
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Learn more problems on : Bacteria Morphology
5.
The cell mass can be measured optically by determining the amount of light scattered by a suspension of cells. The measurements are usually at a wavelength of
300-400nm
400-500nm
500-600nm
600-700nm
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Learn more problems on : Cell Cultivations
6.
Which of the following techniques may be performed quantitatively to determine the number of bacteria of a particular type?
Pour plate
Spread plate
Both (a) and (b)
Streak plate technique
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Learn more problems on : Cell Cultures and Characteristics
7.
Bacteria of genus Nitrosomonas use __________ as their electron source.
ammonia
H2S
succinate
light
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Learn more problems on : Growth and Nutrition of Bacteria
8.
TCA cycle functions in
catabolic reactions
anabolic reactions
amphibolic reactions
none of these
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Learn more problems on : Microbial Metabolism
9.
During DNA replication in prokaryotes, synthesis begins on the circular chromosome
always at the same place
at any stretch of DNA that is high in AT pairs
randomly on the chromosome
at the promoter
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Learn more problems on : DNA Replication
10.
A level of regulation, demonstrated by the termination of transcription if tryptophan is abundant, by the tryptophan operon in E.coli cells is called
activation
attenuation
corepression
desiccation
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Learn more problems on : Transcription
11.
Which of the following molecule catalyzes the transpeptidation reaction?
RNA polymerase
Peptidyl transferase
DNA ligase
DNA polymerase
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Learn more problems on : Translation and Regulation
12.
The term used for acquisition of naked DNA from its environment and its incorporation in their genome by a bacterium is
transformation
lysogenic conversion
conjugation
transduction
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Learn more problems on : Microbial Recombination and Gene Transfer
13.
Weil-Felix reaction is based on sharing of antigens between
sheep RBCs and EB virus
mycoplasma and human O group RBCs
rickettsial antigens and antigens of certain strains of Proteus
none of these
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Learn more problems on : Antigen Antibody Reaction
14.
Yersinia enterocolitica and Y. pestis can be differentiated on the basis of which of the following tests?
Decarboxylation of ornithine
Fermentation of sucrose and cellobiose
Motility at 22°C
All of these
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Learn more problems on : Spirochacter and Enterobacteriaceac
15.
Molds are considered as
mesophillic
psychotropic
thermophillic
all of these
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Learn more problems on : Fungi - Molds and Yeasts
16.
Which of the following characteristics would not be used to classify viruses?
Type of cell wall structure
Type of nucleic acid
Presence of an envelope
Symmetry
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Learn more problems on : Viruses From Animal and Plants
17.
Activated sludge contains large number of
bacteria
yeasts and molds
protozoa
all of these
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Learn more problems on : Microbiology of Waste Water
18.
A musty or muddy odor of the fish is attributed to
the growth of Streptomyces species in the mud at the bottom of the body of water
the mud at the bottom of the body of water
the growth of Pseudomonas species in the mud at the bottom of the body of water
none of the above
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Learn more problems on : Fish and Sea Foods
19.
Which of the following organisms have shown the ability of phosphate solubilization in red wine?
S.cerevisiae
Gluconobacter oxydans
Bacillus subtilis
None of these
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Learn more problems on : Industrially Useful Microbial Processes
20.
The function of a viral capsid is
protection against the viral genome from physical and enzymatic destruction
providing binding sites that enable the virus to attach to specific receptor sites on the host cell
serving as a vehicle of transmission from one host to another
all of the above
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Learn more problems on : Viruses
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