MCB2340C Module 02 Quiz Latest 2023
MCB2340C Section 04 General Microbiology
Module 02 Quiz
Assignment Content
Question 1
All these terms categorize microorganisms based on their temperature preference EXCEPT
1.Obligate halophile
2.Psychrophile
3.Mesophile
4.Psychrotroph
Question 2
If the heat-fixation step is omitted in a simple stain, what will happen?
1.The dye will not be taken up by the cells
2.The staining process will destroy the cells
3.The cells can wash off the slide
4.The cell morphology will change
Question 3
Gram-negative cell walls contain a thin layer of peptidoglycan, whereas Gram-positive cell walls contain a thick layer of peptidoglycan.
1. True
2. False
Question 4
All the following organisms are expected to grow within an anaerobe jar EXCEPT
1.Obligate anaerobe
2.Aerotolerant anaerobe
3.Obligate aerobe
4.Facultative anaerobe
Question 5
If a bacterium were placed in a hypertonic solution prepared by the addition of sucrose, which of the following would happen to the bacterium?
1.The bacterial cell would swell but not lyse because of the presence of the cell wall
2.The bacterial cell would not change
3.The bacterial cell would undergo osmotic lysis
4.The bacterial cell would undergo plasmolysis
Question 6
All the following are environmental factors that affect microbial growth EXCEPT
1.Temperature
2.Osmotic pressure
3.pH
4.Cell wall type
Question 7
A ___________ is used to remove the primary stain from the bacterial cell wall in a differential staining technique.
1.Mordant
2.Decolorizer
3.Secondary stain
4.Counterstain
Question 8
In the acid-fast stain, non-acid-fast bacteria appear blue under the microscope.
1. True
2. False
Question 9
An acidophile is an organism that has an optimal pH for growth below 5.5.
1. True
2.False
Question 10
All microorganisms use oxygen in their metabolism.
1. True
2. False
Question 11
The environmental conditions on human skin have NaCl levels slightly above that of most bacterial cells. What category of organism would most likely be part of the normal skin microflora?
1.A halotolerant organism
2.An obligate halophile
3.An obligate anaerobe
4.A psychrophile
Question 12
Capsule staining techniques stain the background and the vegetative cell of an incapsulated bacterium because the capsule doesn’t react with most stains.
1. True
2.False
Question 13
All these terms categorize microorganisms based on their temperature preference EXCEPT:
1.Mesophile
2.Psychrophile
3.Psychrotroph
4.Chemoautotroph
Question 14
All the following are found in most prokaryotic cells EXCEPT:
1.cell membrane
2.cytoplasm
3.cell wall
4.Nucleus
Question 15
A ____________ is used in the Gram stain procedure to complex with the dye and trap it within the cell of a bacterium with a thick peptidoglycan cell wall?
1.Mordant
2.Decolorizer
3.Counterstain
4.Primary stain
Question 16
Gram positive cells appear purple after Gram staining whereas Gram negative cells appear pink.
1. True
2. False
Question 17
___________________ is used to stain the endospore in the endospore staining procedure.
1.Methylene blue
2.Crystal violet
3.Malachite green
4.Safranin
Question 18
Heat-fixation is performed in slide preparation in order to _________________________________.
1.Fix the morphology of the organisms on the slide
2.Encourage bacterial growth on the slide
3.Inactivate and adhere microorganism placed on the slide
4.Protect the bacteria by hardening them to prevent destruction by the staining procedure
Question 19
Heating or steaming a fixed smear with the primary stain, malachite green, enhances the penetration of the stain into this structure.
1.Capsule
2.Cell wall
3.Chloroplast
4.Endospore
Question 20
A hypotonic solution is one with a solute concentration greater than the concentration which exists within the cell.
1. True
2. False
Question 21
If a bacterium were placed in a hypotonic solution prepared by the addition of sucrose, which of the following would happen to the bacterium?
1.The bacterial cell would swell but not lyse because of the presence of a cell wall
2.The bacterial cell would not change
3.The bacterial cells will undergo osmotic lysis
4.The bacterial cells will undergo plasmolysis
Question 22
The simple stain technique provides enough information about a microbe to identify its species reliably:
1. True
2. False
Question 23
As long as the normal enzymatic function is not compromised, a microorganism will grow across the range of pH.
1. True
2. False
Question 24
Organisms that require a lower level of molecular oxygen for their metabolism than what is typically found in the atmosphere, are called __________________?
1.Microaerophiles
2.Obligate aerobes
3.Facultative anaerobes
4.Aerotolerant anaerobes
Question 25
Where would you expect an obligate aerobe to grow in a fluid thioglycollate media tube?
1.The upper part of the tube
2.The lower part of the tube
3.Throughout the tube
4.The middle part of the tube
MCB2340C Module 02 Quiz
Question 1
According to the binomial system of nomenclature, which of the following is the incorrect way to report a specific organism’s scientific name at any point in using it in an answer or a document.
E. coli
Escherichia coli
Escherichia Coli
All the above answers are acceptable
Question 2
Isolated bacteria can be isolated from a mixed culture by all of the following techniques EXCEPT:
Growing the sample in a nutrient broth enrichment culture
Streak plating
Serial dilution followed by spread plating
Serial dilution followed by pour plating
Question 3
The following method can be used to isolate a specific bacterial type from a mixed culture?
Gram staining
Enrichment culture
Acid-fast staining
Serial dilution followed by spread plating
Question 4
The group of organisms that includes Saccharomyces cerevisiae (a yeast) and Penicillium aspergillus ( amold) is known as _______
Algae
Bacteria
Fungi
Viruses
Question 5
Which is found in animal cells, but not plant or algae cells:
Cell membrane
Chloroplasts
Central vacuole
Centrioles
Question 6
Which is found in plant or algae cells but not in animal cells:
Cell membrane
Mitochondria
Cell wall
Peroxisomes
Question 7
Helminths are included in the study of microbiology because
They are all mammalian parasites
They are mostly microscopic, and that is the only way they can be studied
The eggs and larvae are mostly microscopic, and that is the easiest way to identify them
They are often found in a mixed infection which includes various species of microbes
Question 8
Which is a symbiotic relationship that benefits both members of the relationship?
Mutualism
Parasitism
Commensalism
Amensalism
Question 9
Naegleriafowleri
Giardia lamblia
Euglena gracilis
Blastomycesdermatitidis
Question 10
Isolated bacteria can be isolated from a mixed culture by all of the following techniques EXCEPT:
Streak plating
Loop dilution pour plating
Gram staining
Serial dilution followed by spread plating
Question 11
The binomial system of nomenclature states that the correct way to report a specific organism’s scientific name the first time you use it in an answer or a document is:
Escherichia coli
E. coli
Escherichia c.
escherichia coli
Question 12
All animals, most bacteria, fungi, and protozoans that use organic compounds as the source of both carbon and energy are referred to as ___________________.
Photoautotrophs
Chemoautotrophs
Photoheterotrophs
Chemoheterotrophs
Question 13
An example of a bacterial virus is
Escherichia coli
Bacteriophage T4
Influenzavirus
Adenovirus
Question 14
Bacterial replication is accomplished primarily by
Mitosis
Meiosis
Cytokinesis
Binary fission
Question 15
Organized communities of many different types of microbes growing on surfaces are called ____________.
Colonies
Biofilms
Biospheres
Flora
Question 16
These eukaryotes can have a complicated lifestyle including a fertilized egg, larvae, and adult stage and can involve several intermediate hosts before the definitive host for the adult parasite:
Fungi
Protozoans
Helminths
All the above answers
Question 17
Which of the following is most likely to be the most frequently used portals of entry for a pathogen?
Mucosal membranes of the gastrointestinal and respiratory tracts
Broken skin
Genitourinary tract
Conjunctiva of eyes
B and D.
Question 18
The so-called “red tide” is generally caused by which of the following organisms?
Lichens
Bacteria
Diatoms
Algae
Question 19
According to the binomial system of nomenclature, escherichia coli is the correct way to report this organism’s name the first time you use it in an answer or a document. After that point, you can abbreviate it to e-coli.
True
False
Question 20
The correct sequence of stages in the multiplication of animal viruses is
Attachment, penetration, uncoating, biosynthesis, assembly, release
Penetration, attachment, assembly, uncoating, biosynthesis, release
Attachment, uncoating, penetration, biosynthesis, assembly, release
Penetration, uncoating, adsorption, biosynthesis, assembly, release
Question 21
Bacterial stains are commonly used for all the following EXCEPT:
The treatment of disease
The diagnosis of disease
The pathogen identification process
The classification of organisms
Question 22
Binary fission is the process used by which of these organisms for cell division?
Bacteria
Helminths
Fungi
Algae
Question 23
The subgroup of fungi that are used as food (edible mushrooms, morels, and truffles) are called
Basidiomycota
Ascomycota
Lichens
Zygomycota
Question 24
A bacteriophage is an example of a complex bacterial virus which is neither purely helical or completely icosahedral and has protein tails and must always contain both DNA and RNA.
True
False
Question 25
Bacterial stains are commonly used for all the following EXCEPT:
The pathogen identification process
The diagnosis of disease
The classification of organisms
The treatment of disease
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