8238888
Descripción
Test por Med Student , actualizado hace más de 1 año
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Creado por Med Student
hace más de 7 años
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Pregunta 1
Pregunta
Name the components of nutrient media
Respuesta
-
Glucose Broth
-
Meat-Peptone Broth
-
Meat-Peptone agar
-
Blood Agar
Pregunta 2
Pregunta
Most of the bacterial colonies are visualized after:
Respuesta
-
20 minutes
-
2 hours
-
1-2 days
-
1 week
Pregunta 3
Pregunta
According to their cell wall structures bacteria divide into
Respuesta
-
Aerobes and Anarobes
-
Prokaryotes and Eukaryotes
-
Gram (+) and Gram (-)
-
Prototrophs and Auxotrophs
Pregunta 4
Pregunta
Extra chromosomal genetic elements in bacteria are
Respuesta
-
Mesosomes
-
Phagosomes
-
Transposons
-
Plasmids
Pregunta 5
Pregunta
How many phases have growth curve of bacteria?
Ans: [blank_start]4[blank_end]
Name them:
a/ [blank_start]Lag[blank_end] Phase
b/ [blank_start]Log[blank_end] Phase
c/ [blank_start]Stationary[blank_end] Phase
d/ [blank_start]Decline[blank_end] Phase
Respuesta
-
4
-
Lag
-
Log
-
Stationary
-
Decline
Pregunta 6
Pregunta
Sex-pili of bacteria helps for their
Respuesta
-
Movement
-
Conjugation
-
Nutrition
-
Protection
Pregunta 7
Pregunta
Name the three shapes of bacteria:
a/ [blank_start]Round[blank_end] ([blank_start]Cocci[blank_end])
b/ [blank_start]Rods[blank_end]
c/ [blank_start]Spiral[blank_end] ([blank_start]Spirilli[blank_end])
Respuesta
-
Round
-
Cocci
-
Rods
-
Spiral
-
Spirilli
Pregunta 8
Pregunta
What is the most resistant to an unappropiate conditions bacterial form?
Respuesta
-
Vegetative
-
Spore
Pregunta 9
Pregunta
Which of the following bacterial structures prevents phagocytosis?
Respuesta
-
Cytoplasm
-
Peptidoglycan
-
Capsule
-
Nuclues
Pregunta 10
Pregunta
Are flagellas an obligatory structure of bacterium?
Respuesta
- True
- False
Pregunta 11
Pregunta
What chemical is responsible for the acid-fast property of mycobacteria?
Ans: [blank_start]Mycolic acids[blank_end]
Respuesta
-
Mycolic acids
Pregunta 12
Pregunta
Name two bacteria that have capsules:
a/ [blank_start]E. coli[blank_end]
b/ [blank_start]Salmonella[blank_end]
Respuesta
-
E. coli
-
Salmonella
Pregunta 13
Pregunta
In microbiology what is the most commonly used objective
Ans: [blank_start]Oil[blank_end]
Explain:
This is because [blank_start]oil[blank_end] unlike other liquids like water has very [blank_start]little light refraction[blank_end]
Respuesta
-
Oil
-
oil
-
little light refraction
Pregunta 14
Pregunta
What is the name of staining method for Corynebacterium diphtheriae?
Respuesta
-
Gram
-
Moller
-
Zhiehl-Neelsen
-
Neisser
Pregunta 15
Pregunta
Gram (+) bacteria are stained in [blank_start]blue[blank_end] colour and Gram (-) in [blank_start]red[blank_end] colour
Respuesta
-
blue
-
red
Pregunta 16
Pregunta
The main taxonomic category for bacteria is
Respuesta
-
Genus
-
Species
-
Family
-
Ordo
Pregunta 17
Pregunta
According Gram, the Gram (-) bacteria are stained in [blank_start]red[blank_end] colour
Respuesta
-
red
Pregunta 18
Pregunta
The unit for bacterial size is:
Respuesta
-
milimeter
-
micrometer
-
nanometer
-
angstrom
Pregunta 19
Pregunta
Vibrions are curved bacteria with
Respuesta
-
4-6 curves
-
many curves
-
one curve
-
two curves
Pregunta 20
Pregunta
Ziehl-Neelsen is a staining procedure in:
Respuesta
-
encapsulated bacteria
-
spore-forming bacteria
-
acid-fast bacteria
-
motile bacteria
Pregunta 21
Pregunta
Bacterial cytoplasm contains:
Respuesta
-
capsule
-
ribosomes
-
nucleotide
-
peptidoglycan
-
pili
-
inclusions
Pregunta 22
Pregunta
Name the purposes of simple staining:
a/ Determine cell [blank_start]shape[blank_end]
b/ Determine cell [blank_start]size[blank_end]
c/ Determine cell [blank_start]arrangement[blank_end]
Respuesta
-
shape
-
size
-
arrangement
Pregunta 23
Pregunta
The main staining procedure that detect morphology of bacteria is:
Respuesta
-
Loeffler
-
Neisser
-
Gram
-
Pfeiffer
Pregunta 24
Pregunta
The name Baccilus antracis defines certain bacterial
Respuesta
-
Genus
-
Species
-
Class
Pregunta 25
Pregunta
Is it true: Bacterial spores are formed in unfavorable conditions and are means of multiplying
Respuesta
- True
- False
Pregunta 26
Pregunta
Staining according Victoria blau is a [blank_start]simple[blank_end] method
Respuesta
-
simple
-
complex
Pregunta 27
Pregunta
Which of the following organelles are essential for bacteria?
Respuesta
-
cytoplasm membrane
-
pili
-
capsule
-
flagella
-
nucleoid
-
ribosomes
Pregunta 28
Pregunta
What are the curved bacteria?
Respuesta
-
staphylococci
-
helicobacter
-
vibrions
-
bacilli
Pregunta 29
Pregunta
Diplococci are [blank_start]round[blank_end] shaped bacteria that are arranged in [blank_start]pairs[blank_end]
Respuesta
-
round
-
pairs
Pregunta 30
Pregunta
Staphylococci are round shaped bacteria arranged in [blank_start]clusters[blank_end]
Respuesta
-
clusters
Pregunta 31
Pregunta
The volutine bodies are inclusions in the cytoplasm of:
Respuesta
-
menigococci
-
diptheria bacteria
-
genococci
-
pneumococci
Pregunta 32
Pregunta
Where is lipopolysaccaride situated?
Respuesta
-
in the cell wall of Gram (+) bacteria
-
in the cell wall of Gram (-) bacteria
-
in the both groups
Pregunta 33
Pregunta
Name at least two rod-shaped bacteria
a/ [blank_start]Bacillus anthracis[blank_end]
b/ [blank_start]Clostridium tetani[blank_end]
Respuesta
-
Bacillus anthracis
-
Clostridium tetani
Pregunta 34
Pregunta
How many spores form one bacteria?
Respuesta
-
one
-
two
-
three
-
more than one
Pregunta 35
Pregunta
Loefler technique stain bacteria in [blank_start]blue[blank_end] colour
Respuesta
-
blue
Pregunta 36
Pregunta
The causative agent of tuberculosis is stained in red color, using [blank_start]Ziehl[blank_end] [blank_start]Neelsen[blank_end] (name the staining method)
Respuesta
-
Ziehl
-
Neelsen
Pregunta 37
Pregunta
What are the two purposes of heat fixation
a/ [blank_start]kill[blank_end] organisms
b/ allows stain to be [blank_start]absorbed[blank_end]
Respuesta
-
kill
-
absorbed
Pregunta 38
Pregunta
Each bacteria has two names and they define its
Respuesta
-
family and genus
-
family and kingdom
-
genus and species
Pregunta 39
Pregunta
Bacteria cell is
Respuesta
-
eukaryotic
-
prokaryotic
Pregunta 40
Pregunta
Which of the following is NOT found in the cell wall of gram (-) bacteria?
Respuesta
-
Lipid A
-
Teichoic acids
-
O-antigen
-
peptidoglycan
Pregunta 41
Pregunta
Name the different types of bacteria pili and what are their function
a/ [blank_start]common[blank_end] and its function is [blank_start]adhesion[blank_end]
b/ [blank_start]sex[blank_end] and its function is [blank_start]conjugation[blank_end]
Respuesta
-
common
-
adhesion
-
sex
-
conjugation
Pregunta 42
Pregunta
Loeffler stain requires
Respuesta
-
Methylene blue
-
Ziehl fuschin
-
Gentian violet
-
Iodine solution
Pregunta 43
Pregunta
Which of the following methods of staining are complex
Respuesta
-
Pfeiffer
-
Neisser
-
Klett
-
Loeffler
Pregunta 44
Pregunta
Bacterium Diphteri and its structure : [blank_start]Volutine granule[blank_end]
Respuesta
-
Volutine granule
Pregunta 45
Pregunta
The volutine granules of Bacterium Diphteri are visualized by : [blank_start]Neisser[blank_end] staining
Respuesta
-
Neisser
Pregunta 46
Pregunta
The following structures are localized in the cytoplasm:
Respuesta
-
Spores
-
Nucleoids
-
Flagellum
-
Capsules
Pregunta 47
Pregunta
Based on their cellular structure bacteria are divided into:
Respuesta
-
Cocci and rods
-
Gram + and Gram –
-
Spares and spiral
-
Aerobes and anaerobe
Pregunta 48
Pregunta
Peptides Glycan polymer are found only in :
Respuesta
-
Bacterial cell
-
Animal cell
-
In viruses
Pregunta 49
Pregunta
Chemical structure of the capsule is composed of :
Respuesta
-
Complex polysaccharides
-
Vitamins
-
Polypeptides
Pregunta 50
Pregunta
Sporulation appears to be :
Respuesta
-
An initiation of reproduction of bacterial cell
-
A reaction of conditions that are unfavorable for normal growth
-
A status to resist desiccation and other harmful conditions
-
a & b
-
b & c
Pregunta 51
Pregunta
The complete killing or removal of all microorganisms including bacteria spores is called :
Respuesta
-
Sterilization
-
Disinfection
-
Antisepsis
-
Sepsis
Pregunta 52
Pregunta
What is the color of the simple method of Pfeiffer staining : [blank_start]red[blank_end]
Respuesta
-
red
Pregunta 53
Pregunta
Pfeiffer technical staining makes use of the following :
Respuesta
-
Methylene blue
-
Carbon Fuchsine
-
Neutral red
-
Gentian violet
Pregunta 54
Pregunta
The cell wall of gram (+) bacteria is composed mainly :
Respuesta
-
Hitine (typical for plants)
-
Peptidoglycan (90%)
-
Cellulose
-
Sugars
Pregunta 55
Pregunta
Which of the following bacteria have peptidoglycan layer:
Respuesta
-
Gram (+) cocci
-
Gram (-) bacteria
-
Both of them
-
None above
Pregunta 56
Pregunta
Cellular DNA is concentrated in (what place) :
Respuesta
-
Cytoplasm as a nucleoid
-
Mitochondria
-
Plasmids as an extra chromosomal genetic material
-
Ribosomes
Pregunta 57
Pregunta
The spores stain by Moller are :
Respuesta
-
Blue color
-
Red color
-
Black color
-
Yellow color
Pregunta 58
Pregunta
Which structure is NOT protecting bacteria from phagocytosis from leukocytes:
Respuesta
-
Spores
-
Capsule
-
Flagella
-
Ribosome
Pregunta 59
Pregunta
Name two simple (basic) stains
a/ [blank_start]Loeffler[blank_end]
b/ [blank_start]Pfeiffer[blank_end]
Respuesta
-
Loeffler
-
Pfeiffer
Pregunta 60
Pregunta
The concentration of ethyl alcohol as an antiseptic for disinfection is :
Respuesta
-
95%
-
70%
-
50%
-
30%
Pregunta 61
Pregunta
Bacterial nucleoid consists of :
Respuesta
-
No chromosomes
-
Only one chromosome
-
Several chromosomes
Pregunta 62
Pregunta
What is the name of staining procedure for bacterial capsule:
Respuesta
-
Gram stain
-
Loeffler stain
-
Klett stain
-
Moller stain
Pregunta 63
Pregunta
Lipopolysaccharide can be found in large amount :
Respuesta
-
Gram (+)
-
Gram (-)
-
Both of them
-
None of above
Pregunta 64
Pregunta
Complex method for bacterial staining are :
Respuesta
-
Loeffler
-
Pfeiffer
-
Gram
-
Ziehl-Neelsen
Pregunta 65
Pregunta
Bacterial antibiotic resistance is frequently covered by :
Respuesta
-
Tempered bacteriophage
-
R-plasmids
-
Lipid bacteriophage
-
Intron
Pregunta 66
Pregunta
What constitutes a bacterial culture :
a/ [blank_start]Solute[blank_end]
b/ dry [blank_start]agar[blank_end]
c/ [blank_start]broth[blank_end]
Respuesta
-
Solute
-
agar
-
broth
Pregunta 67
Pregunta
Which one is a liquid medium for bacterial culture:
Respuesta
-
Blood agar
-
Glucose broth
-
Both of them
-
None above
Pregunta 68
Pregunta
Anaerobes are bacteria that can tolerate high oxygen concentration
Respuesta
- True
- False
Pregunta 69
Pregunta
What bacterial physiologist studies :
Respuesta
-
Morphology of bacteria
-
Bacterial structure
-
Bacterial growth
-
Bacterial nutrient
Pregunta 70
Pregunta
70% ethanol is :
Respuesta
-
Sterilizing agent
-
Antiseptic
-
Antibiotic
-
None is true
Pregunta 71
Pregunta
Which of the following is most important structure related to microbial attachment to cells :
Respuesta
-
Flagellum
-
Plasmid
-
Peptidoglycan
-
Ordinary Pilli
Pregunta 72
Pregunta
Which statement about genetic transfer among bacteria requires cell to cell contact:
Respuesta
-
Process of conjugation
-
Process of transduction
-
Process of transcription
-
Process of auto combination
-
Process of transformation
Pregunta 73
Pregunta
Which of the following related to endotoxin is not true:
Respuesta
-
Endotoxins are secreted from living cells
-
Endotoxins are part of cellular gram (-) bacteria
-
They are secreted only when the cell is disrupted
-
They can be linked to meningococcemia
-
They are produced by gram(-) microorganisms
-
They cause fever
Pregunta 74
Pregunta
What cause (hint) to be pink :
Respuesta
-
Carbon Fuchsin
-
Iodine solution
-
Crystal violet
-
Neisser A
Pregunta 75
Pregunta
Gram (-) bacteria differ from Gram (+) ones because the posses :
Respuesta
-
Lipopolysaccharide
-
Peptidoglycan
-
Only cytoplasmic membrane
-
Lipoteichoic acid
Pregunta 76
Pregunta
The auto-sterilisation requires the following :
Respuesta
-
1:30 hours at 160 C
-
134 C for 10-15 minutes
Pregunta 77
Pregunta
The chlorine is :
Respuesta
-
Antiseptic
-
Disinfectant
-
Chemical agent for sterilization
-
All of above
Pregunta 78
Pregunta
Concerning bacterial cell division everything is true except that :
Respuesta
-
All bacteria double their numbers every 10 hours
-
Bacterial generation times are influenced by environmental conditions
-
Two bacterial cells following division are genetically identical and they are once
Pregunta 79
Pregunta
How does high temperature cause cell death?
Respuesta
-
Oxidative damage
-
High level of electrolytes
-
Protein denature
-
All of above
Pregunta 80
Pregunta
How are the actions of phenols and alcohols similar :
Respuesta
-
Both denature proteins
-
Both oxidize DNA
-
Both inhibit nucleic acid synthesis
-
All of above
Pregunta 81
Pregunta
What is pasteurization :
Respuesta
-
A method that disinfects the instruments
-
Sterilizes food
-
A method that can be used on skin and mucus
-
All of above
Pregunta 82
Pregunta
Bacterial flagella are :
Respuesta
-
Composed of pillin
-
A floppy structure made of flagellin
-
Rigger structure made of flagellin
Pregunta 83
Pregunta
Name the complex nutrient media :
Respuesta
-
Glucose broth
-
Mid peptone broth
-
Mid peptone agar
-
Blood agar
Pregunta 84
Pregunta
Extra chromosomal genetic elements in bacteria are :
Respuesta
-
Mesosomes
-
Phagosomes
-
Transposomes
-
Bacteriophages ( or plasmids)
Pregunta 85
Pregunta
What part of the bacterial cell is most involved with Gram staining and why?
Ans: [blank_start]Cell wall[blank_end]
Explanation: Gram [blank_start]positive[blank_end] bacteria have a [blank_start]thick[blank_end] peptidoglycan cell [blank_start]wall[blank_end] that holds the stain [blank_start]better[blank_end] than the [blank_start]thin[blank_end] peptidoglycan gram [blank_start]negative[blank_end] cell [blank_start]wall[blank_end]
Respuesta
-
positive
-
thick
-
wall
-
better
-
thin
-
negative
-
wall
-
Cell wall
Pregunta 86
Pregunta
What is the purpose of heat during the acid-fast staining procedure?
The heat [blank_start]drives[blank_end] the stain [blank_start]into[blank_end] the cells
Respuesta
-
drives
-
into
Pregunta 87
Pregunta
Name two curved bacteria:
a. [blank_start]Vibrio Cholerae[blank_end]
b. [blank_start]Helicobacteria[blank_end]
Respuesta
-
Vibrio Cholerae
-
Helicobacteria
Pregunta 88
Pregunta
Name the reagent used and state the purpose of each of the following
a/ mordant: Reagent- [blank_start]Iodine[blank_end] solution, Function: form a [blank_start]complex[blank_end] between the crystal violet and [blank_start]iodine[blank_end]
b/ primary stain: Reagent- [blank_start]Gentian Violet[blank_end], Function: increases the [blank_start]contrast[blank_end] of both gram-negative and gram-positive bacteria
c/ decolorizer: Reagent- [blank_start]Alcohol[blank_end], Function: [blank_start]dehydrates[blank_end] the peptidoglycan layer
d/ counterstain: Reagent- [blank_start]carbol fuschin[blank_end], Function: stains solution light [blank_start]red[blank_end] allowing Gram [blank_start]negative[blank_end] to be seen
Respuesta
-
Alcohol
-
Iodine
-
complex
-
iodine
-
Gentian Violet
-
contrast
-
dehydrates
-
carbol fuschin
-
red
-
negative
Pregunta 89
Pregunta
Round bacteria in chains are named [blank_start]streptococci[blank_end]
Respuesta
-
streptococci
Pregunta 90
Pregunta
What suggestions about endotoxins are true?
a/ they are typical for [blank_start]Gram (-)[blank_end]
b/ they act [blank_start]non-specific[blank_end]
c/ their chemical structure is [blank_start]lipopolysaccarides[blank_end]
d/ they are heat [blank_start]stable[blank_end]
Respuesta
-
Gram (-)
-
Gram (+)
-
non-specific
-
specific
-
lipopolysaccarides
-
proteins
-
stable
-
labile
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