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Online Microbiology Test - Microbiology Test 4

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.
In eukaryotic cells, ribosomes are
70S
60S
80S
Not specific
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Learn more problems on : Bacteria Morphology
2.
The cell wall of
gram-positive bacteria are thicker than gram-negative bacteria
gram-negative bacteria are thicker than gram-positive bacteria
both have same thickness but composition is different
none of these
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Learn more problems on : Bacteria Morphology
3.
The size of a single plant cell is usually within the range of
10-20μm in diameter and 25-100μm long
20-40μm in diameter and 100-200μm long
40-60μm in diameter and 200-300μm long
60-80μm in diameter and 300-400μm long
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Learn more problems on : Cell Cultivations
4.
Exponential phase of growth curve of bacteria is of limited duration because of
rise in cell density
accumulation of toxic metabolites
exhaustion of nutrients
all of these
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Learn more problems on : Growth and Nutrition of Bacteria
5.
Which of the following(s) is/are the products of the light reactions of photosynthesis?
ATP only
NADPH only
ATP and O2 only
ATP, NADPH, and O2
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Learn more problems on : Microbial Metabolism
6.
In the time since E. coli and Salmonella diverged evolutionarily
there has been little change in either genome
E. coli has acquired many genes via horizontal transfer
E, coli has lost approximately 50% of its genome
none of these
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Learn more problems on : Microbial Genetics
7.
The PCR/sequencing approach to rRNA is most likely to give information about
the species to which the bacteria are most closely related
morphology of the bacterium
the type of energy metabolism the bacterium has
whether the bacterium is motile
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Learn more problems on : Polymerase Chain Reaction
8.
In which of the following case a large lattice is formed?
Antibody is in excess
Antigens and antibodies are in optimal proportion
Antigen is in excess
None of these
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Learn more problems on : Antigen Antibody Reaction
9.
Which of the following gram-negative bacteria is/are not aerobic?
Pseudomonas
Neisseria
Escherichia
None of these
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Learn more problems on : Bacteria
10.
Organisms are parasitic and have a resistant spore with one to six coiled polar filaments belong to which phylum of Protozoa?
Labyinthomorpha
Sarcomastigophora
Apicomplexa
Myxozoa
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Learn more problems on : Protozon
11.
Starch is an energy storage material characteristic of
chlorophyta
chrysophyta
phaeophyta
rhodophyta
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Learn more problems on : Algae
12.
When a virus enters a cell but does not replicate immediately, the situation is called
lysogeny
fermentation
symbiosis
synergism
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Learn more problems on : Viruses
13.
The microbial ecosystem of soil includes
biotic components of soil
abiotic components of soil
biotic and abiotic components of soil
none of the above
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Learn more problems on : Microbiology of Soils
14.
Certain strains of Streptococcus lactis var. maltigenes may produce
bitter flavor
acid flavor
burnt or caramel flavor
none of these
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Learn more problems on : Milk and Milk Products
15.
The chief type of spoilage in sweetened condensed milk may be
gas formation by sucrose fermenting yeasts
thickening caused by micrococci
mold colonies growing on the surface
all of the above
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Learn more problems on : Milk and Milk Products
16.
Which of the following is recommended for the improvement in flavor during ageing of beef under controlled conditions?
Thamnidium
Rhizopus
T. elegans
M. mucedo
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Learn more problems on : Poultry, Egg and Meat
17.
Which of the following statements is not true regarding Mycobacterium tuberculosis and/or the disease it causes?
The pathogen contains mycolic acid in its cell wall
The pathogen can live inside macrophages
Antibodies to the pathogen are protective
None of these
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Learn more problems on : Microorganisms and Disease
18.
The beet molasses is pretreated with __________ to reduce great quantity of trace metals.
ferrocyanide or ferricyanide
ethylenediamine tetrachloro acetic acid
hydrochloric acid
sulphuric acid
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Learn more problems on : Industrially Useful Microbial Processes
19.
The most efficient way to enclose a space is within a/an
sphere
cube
icosahedron
helix
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Learn more problems on : Viruses
20.
Which of the following oncogenic viruses was first detected?
Rous sarcoma virus.
Epstein-Barr virus
Herpes simplex virus type 2
Human T cell leukaemia virus
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Learn more problems on : Viruses
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