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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.
  • 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.
Before most molecules can enter the Krebs citric acid cycle, they must be converted to
citric acid
oxaloacetic acid
NADH or FADH
acetyl-CoA
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Learn more problems on : Energy Release and Conservation
2.
Chemotaxis is a phenomenon of
swimming away of bacteria
swimming towards a bacteria
swimming away or towards of bacteria in presence of chemical compound
none of the above
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Learn more problems on : Bacteria Morphology
3.
Which of the following is incorrect?
Mammalian cells are larger and more complex than microorganisms
Their growth rate is very fast compared to microorganisms
Mammalian cells are fragile
Most animal cells only grow when attached to surface
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Learn more problems on : Cell Cultivations
4.
The archaebacterium Halobacterium, an extreme halophile, and Sulfolobus, a thermoacidophile, can be cultured in the presence of antibiotics such as streptomycin and chloramphenicol because
they contain ether-linked isoprenoids in their plasma membrane
they lack murein in their cell wall
they contain 80S, as opposed to 70S, ribosomes
all of the above
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Learn more problems on : Cell Cultivations
5.
Bacteriochlorophyll differs from chlorophyll in what way?
The chelated metal in bacteriochlorophyll is not Mg
There are chemical differences between the two chlorophyll in their side (R) groups
They have different absorption spectra
Both (b) and (c)
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Learn more problems on : Microbial Metabolism
6.
The nonsense codon(s) is/are
UAG
UAA
UGA
all of these
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Learn more problems on : Translation and Regulation
7.
The chromosomal genes, possessing fertility factor is known as
R factor
F prime factor
HFr
F factor
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Learn more problems on : Microbial Recombination and Gene Transfer
8.
Which of the following statement(s) is/are true in regards to F+ x F- mating events?
DNA is transferred from F- to F+ cells
DNA is transferred from F+ to F- cells
No DNA is transferred because F- cells are unable to perform conjugation
No DNA is transferred because F+ cells are unable to perform conjugation
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Learn more problems on : Microbial Recombination and Gene Transfer
9.
Which of the following expresses CD3 surface antigen?
Granulocytes
T cells
Monocytes
B cells
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Learn more problems on : Immune System
10.
Select the statement that does not apply to the kingdom Fungi
The fungi are eukaryotic, multicellular, ingestive heterotrophs
Some fungi form beneficial interrelationships with plants
The fungal life cycle typically includes a spore stage
Certain fungi are natural sources of antibiotic substances
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Learn more problems on : Fungi - Molds and Yeasts
11.
Which of the following is not a function of cysts for Protozoa?
Protect against adverse environments
Sites for nuclear reorganization and cell division
Serve as a means of transfer between hosts in parasitic species
All of the above
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Learn more problems on : Protozon
12.
Characteristics used to place algae into divisions include all of the following except
form of storage material
flagella number and location
accessor pigments used in photosynthesis
all of the above
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Learn more problems on : Algae
13.
Viral RNA is replicated in the host cell
cytoplasmic matrix
nucleus
mitochondria
lysozomes
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Learn more problems on : Viruses in Eukaryotes
14.
The time required to kill 90% of the microorganisms in a sample at a specific temperature is the
decimal reduction time
thermal death point
F value
D value
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Learn more problems on : Physical and Chemical Agents
15.
Which of the following group is not the carbohydrate containing antibiotic?
Streptomycin & Streptothricin
Vancomycin & Moenomycin
Everninomycin & Nogirimycin
Erythromycin & candicidin
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Learn more problems on : Antimicrobial Chemotherapeutic Agents
16.
Fungal amylases using stationary culture with wheat bran utilizes
A. oryzae
A. niger
A. flavus
S. cerevisiae
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Learn more problems on : Industrially Useful Microbial Processes
17.
Species of __________ are predominant on thawing vegetables like sweet corn and peas when the temperature of thawing is fairly low.
Streptococcus
Micrococcus
both (a) and (b)
none of these
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Learn more problems on : Fruits and Vegetables
18.
Which of the following strain(s), that grow in the jellies and candid fruits, are able to grow in sugar concentration upto 67.5%?
Aspergillus
Penicillium
Citromyces
All of these
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Learn more problems on : Heated Canned Foods
19.
Lactoferrin helps to protect against pathogens by
sequestering Iron
blocking sebum production
lowering the pH
facilitating the growth of normal flora
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Learn more problems on : Microorganisms and Disease
20.
Which of these cytokines is also known under the name cachectin?
Interferon gamma
Interleukin 2
Tumor necrosis factor (TNF)
None of the above
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Learn more problems on : Microorganisms and Disease
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