Kopieren und bearbeiten

Biology 2420 Medical Microbiology Test 2

Beschreibung

Quiz am Biology 2420 Medical Microbiology Test 2, erstellt von bconstance am 12/10/2014.
bconstance
Quiz von bconstance, aktualisiert more than 1 year ago
bconstance
Erstellt von bconstance vor mehr als 9 Jahre
203
0
0

Zusammenfassung der Ressource

Frage 1

Frage
In microbiology the term growth usually refers to an increase in
Antworten
  • a microbe's size.
  • the number of microbial cells.
  • the amount of ATP produced.
  • the number and size of microbial cells.
  • the number and size of microbial cells and the amount of ATP produced.

Frage 2

Frage
A cell that uses an organic carbon source and obtains energy from light would be called a
Antworten
  • photoheterotroph
  • lithoautotroph
  • photoautotroph
  • chemoheterotroph.
  • chemoautotroph

Frage 3

Frage
A(n) ______________ organism is one that requires oxygen for growth.
Antworten
  • anaerobic
  • facultative anaerobic
  • aerotolerant
  • obligate aerobic
  • both aerotolerant and anaerobic

Frage 4

Frage
An aquatic microbe that can grow only at the surface of the water is probably which of the following?
Antworten
  • a phototroph
  • a heterotroph
  • a chemotroph
  • a lithotroph
  • an anaerobe

Frage 5

Frage
Which of the following forms of oxygen is detoxified by the enzyme catalase?
Antworten
  • singlet oxygen
  • hydroxyl radical
  • peroxide anion
  • superoxide radical
  • molecular oxygen

Frage 6

Frage
All of the following are used to protect organisms from the toxic by-products of oxygen EXCEPT
Antworten
  • carotenoids.
  • superoxide dismutase
  • peroxidase
  • protease.
  • catalase.

Frage 7

Frage
A microbe that grows only at the bottom of a tube of thioglycollate is probably a(n)
Antworten
  • obligate aerobe.
  • facultative anaerobe.
  • aerotolerant anaerobe.
  • microaerophile.
  • obligate anaerobe.

Frage 8

Frage
Nitrogen is growth limiting nutrient for many organisms because
Antworten
  • it is necessary for the biosynthesis of amino acids
  • it is required for synthesis of nucleotides.
  • it is required for lipid synthesis.
  • only a small number of bacteria are able to extract it from the atmosphere.
  • only a few microbes can extract it from the atmosphere, but all organisms require it for amino acid and nucleotide synthesis.

Frage 9

Frage
Which of the following growth factors would NOT be required by microbes which do not utilize electron transport chains?
Antworten
  • heme.
  • selenium.
  • NADH.
  • vitamins.
  • amino acids.

Frage 10

Frage
At temperatures higher than the maximum growth temperature for an organism,
Antworten
  • proteins are permanently denatured.
  • membranes become too fluid for proper function.
  • hydrogen bonds within molecules are broken.
  • hydrogen bonds are broken, and proteins are proteins are permanently denatured.
  • hydrogen bonds are broken, proteins are denatured, and membranes becomes too fluid.

Frage 11

Frage
Human pathogens are classified as
Antworten
  • thermoduric.
  • thermophiles.
  • mesophiles.
  • hyperthermophiles.
  • psychrophiles.

Frage 12

Frage
The term barophile refers to which of the following growth requirements?
Antworten
  • hydrostatic pressure
  • temperature
  • nitrogen source
  • pH
  • osmotic pressure

Frage 13

Frage
Which of the following organisms would be most likely to contaminate a jar of pickles?
Antworten
  • a neutrophile
  • a thermophile
  • an acidophile
  • an obligate anaerobe
  • a mesophile

Frage 14

Frage
Organisms that can grow with or without oxygen present are
Antworten
  • obligate aerobes.
  • facultative anaerobes.
  • aerotolerant anaerobes.
  • obligate anaerobes.
  • either facultative anaerobes or aerotolerant anaerobes.

Frage 15

Frage
A fastidious organism might be grown on which of the following types of media?
Antworten
  • transport media
  • reducing media
  • enriched media
  • differential media
  • selective media

Frage 16

Frage
Obligate anaerobes may be cultured in the laboratory
Antworten
  • in a reducing medium
  • in a candle
  • in standard Petri plates.
  • on blood agar plates
  • on blood agar plates in a candle jar.

Frage 17

Frage
Joan wants to discover a microbe capable of degrading an environmental contaminant. Which of the following refers to the process she should use?
Antworten
  • chemostat
  • quorum sensing
  • enrichment culture
  • nitrogen fixation

Frage 18

Frage
A microbiologist inoculates a growth medium with 100 bacterial cells/ml. If the generation time of the species is 1 hour, and there is no lag phase, how long will it be before the culture contains more than 10,000 cells/ml?
Antworten
  • 24 hours
  • 7 hours
  • 2 hours
  • 3 hours
  • 10 hours

Frage 19

Frage
An epidemiologist is investigating a new disease and observes what appear to be bacteria inside tissue cells in clinical samples from victims. The scientist wants to try to isolate the bacteria in the lab. What culture conditions are most likely to be successful?
Antworten
  • culturing on blood agar plates
  • inoculation of EMB plates
  • incubation in a candle jar
  • inoculation of cell cultures
  • inoculation of a minimal medium broth

Frage 20

Frage
Which of the following measurement techniques would be useful to quantify a species of bacteria that is difficult to culture?
Antworten
  • membrane filtration
  • viable plate counts
  • MPN
  • microscopic counts
  • metabolic activity

Frage 21

Frage
MacConkey agar plates represent __________ medium.
Antworten
  • a minimal
  • a selective
  • a differential
  • both a differential and a selective
  • both a minimal and a selective

Frage 22

Frage
A Petroff-Hauser counting chamber is
Antworten
  • a glass slide containing an etched grid for counting microbes directly using a microscope.
  • a device that counts cells as they interrupt an electrical current.
  • a device that measures the amount of light that passes through a culture.
  • an apparatus that traps bacterial cells on a membrane filter where they can be counted.
  • a device used to count numbers of bacterial colonies on a Petri plate.

Frage 23

Frage
Another term for the logarithmic growth of bacterial cells is
Antworten
  • generation time.
  • exponential growth.
  • arithmetic growth.
  • absorbance.
  • binary fission.

Frage 24

Frage
A device that removes wastes and adds fresh medium to bacterial cultures in order to prolong the log phase of a culture is called a(n)
Antworten
  • Coulter counter.
  • cytometer.
  • spectrophotometer.
  • pellicle.
  • chemostat.

Frage 25

Frage
A specimen of urine is determined to contain 30 bacterial cells per microliter. How many cells would be present in a milliliter?
Antworten
  • 3
  • 300
  • 30,000
  • 3,000
  • 30 million

Frage 26

Frage
Which of the following is NOT a direct method for measuring the number of microbes in a sample?
Antworten
  • viable plate counts
  • turbidity
  • Coulter counter
  • MPN
  • membrane filtration

Frage 27

Frage
During which growth phase are bacteria more susceptible to antimicrobial drugs?
Antworten
  • lag phase
  • log phase
  • stationary phase
  • death phase
  • the susceptibility is the same for all phases

Frage 28

Frage
The use of salt and sugar in preserving various types of foods is an application of which of the following concepts?
Antworten
  • nitrogen fixation
  • osmotic pressure
  • pH
  • hydrostatic pressure
  • quorum sensing

Frage 29

Frage
A clinical sample labeled as "sputum" was collected from
Antworten
  • the skin.
  • the blood
  • the central nervous system.
  • a piece of tissue.
  • the lungs.

Frage 30

Frage
The method of obtaining isolated cultures that utilizes surface area to dilute specimens is called
Antworten
  • the pour-plate technique.
  • serial dilution.
  • the streak-plate technique.
  • transport media.
  • enrichment culturing.

Frage 31

Frage
__________ are complex communities of various types of microbes that adhere to surfaces.
Antworten
  • Aggregates
  • Colonies
  • Isolates
  • Biofilms
  • Media

Frage 32

Frage
A colony-forming unit is the number of cells
Antworten
  • in a colony.
  • that produces one colony.
  • in a particular specimen.
  • that is in exponential phase in a culture.
  • that can be placed on a Petri plate.

Frage 33

Frage
All of the following ingredients might be found in complex media EXCEPT
Antworten
  • hydrogen peroxide.
  • yeast extract.
  • blood
  • soy extract.
  • milk proteins.

Frage 34

Frage
Sodium thioglycollate is associated with which of the following types of media?
Antworten
  • transport media
  • differential media
  • complex media
  • reducing media
  • selective media

Frage 35

Frage
Which of the following quantification techniques can distinguish living cells from dead cells in a culture?
Antworten
  • microscopic counts
  • dry weight
  • metabolic activity
  • a Coulter counter
  • turbidity

Frage 36

Frage
During the __________ of growth, new cells are being produced at the same rate as other cells are dying.
Antworten
  • lag phase
  • log phase
  • death phase
  • stationary phase
  • intermediate phase

Frage 37

Frage
During the __________ of growth, cells are dying faster than new cells are being produced.
Antworten
  • death phase
  • lag phase
  • log phase
  • stationary phase
  • longitudinal phase

Frage 38

Frage
When cells are metabolically active but not dividing, they are in the
Antworten
  • stationary phase.
  • log phase.
  • lag phase.
  • death phase.
  • exponential phase.

Frage 39

Frage
Metabolic activity is at maximum level in the __________ of growth.
Antworten
  • lag phase
  • log phase
  • death phase
  • stationary phase
  • intermediate phase

Frage 40

Frage
Cells are rapidly growing and dividing during the __________ of growth.
Antworten
  • death phase
  • lag phase
  • log phase
  • stationary phase
  • indeterminate phase

Frage 41

Frage
An organism that tolerates high __________ is called a halophile.
Antworten
  • hydrostatic pressure
  • salt concentrations
  • pH
  • carbon dioxide levels
  • oxygen levels

Frage 42

Frage
A capnophile is a microorganism that thrives in conditions of high __________.
Antworten
  • carbon dioxide levels
  • hydrostatic pressure
  • oxygen levels
  • pH
  • salt concentration

Frage 43

Frage
A microorganism found living under conditions of high __________ is a barophile.
Antworten
  • pH values
  • oxygen concentrations
  • hydrostatic pressure
  • carbon dioxide levels
  • salt concentrations

Frage 44

Frage
Microaerophiles are microbes that grow best at low
Antworten
  • carbon dioxide levels.
  • pH values
  • hydrostatic pressure.
  • oxygen levels.
  • salt concentrations.

Frage 45

Frage
An acidophile thrives under conditions of low
Antworten
  • carbon dioxide levels.
  • salt concentrations.
  • oxygen levels.
  • hydrostatic pressure.
  • pH

Frage 46

Frage
All of the following are associated with nucleic acid structure EXCEPT
Antworten
  • ribose
  • hydrogen bonds.
  • uracil
  • ionic bonds.
  • phosphate

Frage 47

Frage
Which of the following is found at the 5 end of a DNA strand?
Antworten
  • a phosphate group
  • a hydrogen bond
  • a hydroxyl group
  • histones
  • a methyl group

Frage 48

Frage
The bacterial chromosome is
Antworten
  • usually circular.
  • found in a nucleoid
  • found in a nucleus.
  • both circular and found in a nucleoid.
  • both circular and found in a nucleus.

Frage 49

Frage
Which of the following types of plasmids allows a bacterial cell to kill its competitors?
Antworten
  • virulence factors
  • fertility factors
  • bacteriocin factors
  • resistance factors
  • cryptic plasmids

Frage 50

Frage
Which of the following is NOT involved the packaging of eukaryotic chromosomes?
Antworten
  • nucleosomes
  • histones
  • heterochromatin
  • euchromatin
  • Okazaki fragments

Frage 51

Frage
Which of the following statements is true of bacterial plasmids?
Antworten
  • They are found in the nucleoid.
  • They can replicate autonomously
  • They carry genes for essential metabolic functions.
  • They are small circular DNA molecules.
  • They are small circular DNA molecules that can replicate autonomously.

Frage 52

Frage
DNA helicases
Antworten
  • break hydrogen bonds between complementary nucleotides.
  • synthesize short DNA molecules important for the function of DNA polymerase.
  • seal gaps between DNA fragments.
  • proofread DNA molecules.
  • assist in recognition of promoters during transcription.

Frage 53

Frage
Which of the following statements concerning transcription in bacteria is FALSE?
Antworten
  • It occurs in the nucleoid region.
  • Sigma factors are parts of RNA polymerase that recognize promoter regions.
  • The same RNA polymerase transcribes primer RNA, mRNA, tRNA, and rRNA.
  • Termination is either self-induced or due to the presence of Rho protein.
  • There are a variety of sigma factors that affect transcription.

Frage 54

Frage
Which of the following is involved in translation?
Antworten
  • rRNA
  • tRNA
  • mRNA
  • both mRNA and tRNA
  • mRNA, rRNA and tRNA are all involved.

Frage 55

Frage
Which of the following is a characteristic shared by DNA and RNA polymerases?
Antworten
  • efficiency of proofreading
  • type of nucleotides used
  • direction of polymerization
  • speed
  • dependence on helicase

Frage 56

Frage
Which of the following is the strongest base pair?
Antworten
  • guanine-cytosine
  • adenine-uracil
  • adenine-thymine
  • guanine-thymine
  • both adenine-uracil and adenine-thymine

Frage 57

Frage
A codon is a particular combination of three nucleotides. Therefore, there are __________ possible combinations of the nucleotides A, C, G, and T.
Antworten
  • 16
  • 4
  • 12
  • 64
  • 32

Frage 58

Frage
The AUG codon functions in coding for the amino acid methionine and as a
Antworten
  • termination signal.
  • start signal
  • "wobble" codon.
  • marker for introns
  • recognition site for RNA polymerase

Frage 59

Frage
Which of the following must be removed from a eukaryotic mRNA molecule before it can be translated?
Antworten
  • promoter
  • exon
  • intron
  • anticodon
  • codon

Frage 60

Frage
A charged tRNA first enters the ribosomal __________ site and then moves into the __________ site.
Antworten
  • A, E
  • P, A
  • P, E
  • A, P
  • E, A

Frage 61

Frage
Which of the following statements regarding eukaryotic transcription is FALSE?
Antworten
  • Transcription occurs in the nucleus, mitochondria, and chloroplasts (if present).
  • Multiple transcription factors are required.
  • There are four different RNA polymerases.
  • Multiple elongation factors are required.
  • A guanine is added to the 3 end, and a poly-A tail is added to the 5 end of the mRNA transcript.

Frage 62

Frage
Semiconservative DNA replication means that
Antworten
  • each daughter DNA molecule is composed of one original strand and one new strand.
  • nucleotides are constantly being recycled as cells make DNA.
  • the cell can proofread its newly synthesized DNA only part of the time.
  • the sequence of a DNA molecule is preserved as it is being replicated.
  • each strand of a double-stranded DNA molecule is replicated differently.

Frage 63

Frage
Which of the following is NOT a characteristic of Okazaki fragments?
Antworten
  • They are checked for accuracy by DNA polymerase III.
  • They make up the lagging strand of replicated DNA.
  • They begin with an RNA primer.
  • They are joined together by DNA ligase.
  • They are longer in eukaryotic cells.

Frage 64

Frage
The proofreading function of DNA polymerase III results in an error rate of __________ during DNA replication.
Antworten
  • 1 error in 1,000 bases
  • 1 error in 100,000 bases
  • 1 error in 1 million bases
  • 1 error in 10 million bases
  • 1 error in 10 billion bases

Frage 65

Frage
Which of the following processes is involved in the "central dogma" of genetics?
Antworten
  • translation
  • transcription
  • DNA replication
  • transcription and translation
  • DNA replication and translation

Frage 66

Frage
Inducible operons
Antworten
  • are active in the presence of a repressor
  • are generally anabolic pathways
  • are normally active
  • usually require an activator to be transcribed.
  • usually require a repressor to be transcribed.

Frage 67

Frage
Which of the following are considered to be frameshift mutations?
Antworten
  • insertions
  • inversions
  • deletions
  • both inversion and insertion
  • both deletions and insertions

Frage 68

Frage
If the codon AAA is changed to AAG, it still codes for the amino acid lysine; this is an example of a
Antworten
  • silent mutation
  • nonsense mutation
  • frameshift mutation
  • gross mutation
  • missense mutation

Frage 69

Frage
Which of the following causes mutations by creating thymine dimers?
Antworten
  • nucleotide analogs
  • nitrous acid
  • ultraviolet light
  • benzopyrene
  • gamma rays

Frage 70

Frage
DNA damage caused by ethidium bromide results in __________ mutations.
Antworten
  • insertion
  • substitution
  • deletion
  • both inversion and insertion
  • both insertion and deletion

Frage 71

Frage
Which of the following is a DNA repair enzyme activated by visible light?
Antworten
  • transposase
  • DNA photolyase
  • bacteriocin
  • DNA ligase
  • primase

Frage 72

Frage
The Ames test proves that a chemical is
Antworten
  • carcinogenic
  • carcinogenic in Salmonella
  • mutagenic in Salmonella
  • carcinogenic in humans
  • mutagenic in humans

Frage 73

Frage
The horizontal transfer process known as transduction
Antworten
  • involves a virus
  • involves a pilus
  • requires a cell to be "competent"
  • requires a plasmid
  • involves a mutagen

Frage 74

Frage
Frederick Griffith discovered
Antworten
  • transformation
  • transposons
  • the lac operon
  • DNA
  • conjugation

Frage 75

Frage
In conjugation, F+ cells
Antworten
  • serve as recipient cells
  • contain an F plasmid
  • do not have conjugation pili
  • can transfer DNA only to other F+ cells
  • contain "jumping genes"

Frage 76

Frage
Another term for the palindromic sequence found at the ends of transposons is a(n)
Antworten
  • complex
  • bacteriophage
  • insertion sequence
  • inverted repeat
  • transposase

Frage 77

Frage
Which of the following is characteristic of prokaryotic genomes but NOT eukaryotic genomes?
Antworten
  • histones
  • circular chromosomes
  • linear chromosomes
  • enclosed in nuclear membrane
  • typically consist of a few to several chromosomes

Frage 78

Frage
Genes are active in a region of the eukaryotic chromosome called
Antworten
  • heterochromatin
  • the histone
  • the nucleoid
  • the plasmid
  • euchromatin

Frage 79

Frage
The energy required for DNA replication comes from
Antworten
  • DNA polymerase
  • triphosphate deoxyribonucleotides
  • DNA ligase
  • RNA primer
  • the leading strand

Frage 80

Frage
Which of the following is NOT involved in the regulation of the lac operon?
Antworten
  • an inducer
  • a repressor protein
  • an iRNA
  • glucose
  • cyclic AMP

Frage 81

Frage
Genetic elements known as promoters are initiation points in the process of
Antworten
  • DNA replication
  • transcription
  • translation
  • mutation repair
  • transformation

Frage 82

Frage
Codons are recognized during
Antworten
  • translation
  • transcription
  • base excision
  • DNA replication
  • transduction

Frage 83

Frage
__________ is initiated at sequences called origins
Antworten
  • DNA replication
  • translation
  • splicing
  • transcription
  • transposition

Frage 84

Frage
The process of __________ requires the activity of DNA ligase.
Antworten
  • translation
  • capping
  • transcription
  • DNA replication
  • transduction

Frage 85

Frage
RNA polymerase is primarily responsible for
Antworten
  • DNA replication
  • translation
  • transcription
  • transformation
  • polyadenylation

Frage 86

Frage
The process of __________ requires participation of tRNA molecules
Antworten
  • DNA replication
  • capping
  • transduction
  • translation
  • dark repair

Frage 87

Frage
The process of __________ is initiated with the incorporation of fMet.
Antworten
  • translation
  • transcription
  • capping
  • DNA replication
  • light repair

Frage 88

Frage
Initiation of __________ involves Sigma factor molecules.
Antworten
  • DNA replication
  • translation
  • transcription
  • splicing
  • termination

Frage 89

Frage
The process of __________ is described as semiconservative.
Antworten
  • translation
  • transcription
  • mismatch repair
  • transformation
  • DNA replication

Frage 90

Frage
During __________, the growing polymer is located in the P site.
Antworten
  • polyadenylation
  • DNA replication
  • mismatch repair
  • transcription
  • translation

Frage 91

Frage
Standard methods of sterilization are not effective in inactivating
Antworten
  • viruses
  • bacterial cells
  • prions
  • bacterial endospores
  • fungi

Frage 92

Frage
Which of the following statements is true of disinfectants?
Antworten
  • Disinfectants are effective in destroying endospores.
  • Disinfectants are used on living tissue.
  • Disinfectants are used for sterilization
  • Disinfectants are used on inanimate surfaces.
  • Disinfectants are only effective for short periods of time (seconds to minutes).

Frage 93

Frage
Which of the following statements concerning microbial death is FALSE?
Antworten
  • It can be used to evaluate the efficacy of antimicrobial agents.
  • It is constant over time of exposure to an antimicrobial agent.
  • It is the permanent loss of a microbe's reproductive ability.
  • It is the permanent loss of a microbe's ability to reproduce and can be used to evaluate antimicrobial agents
  • It is not an effective means of evaluating the efficacy of antimicrobial agents.

Frage 94

Frage
Which of the following is an example of sanitization?
Antworten
  • A public toilet is treated with disinfectants.
  • A surgeon washes her hands before surgery
  • Heat is used to kill potential pathogens in apple juice.
  • An autoclave is used to prepare nutrient agar.
  • A nurse prepares an injection site with an alcohol swab.

Frage 95

Frage
Aseptic means
Antworten
  • sterile
  • free of all microbes
  • clean
  • sanitized
  • free of pathogens

Frage 96

Frage
Which of the following would NOT be bacteriostatic?
Antworten
  • desiccation
  • freezing below 0 degrees Celsius
  • lyophilization
  • autoclaving
  • refrigeration of mesophiles

Frage 97

Frage
Antimicrobial agents that damage nucleic acids also affect
Antworten
  • the cell wall
  • the cell membrane
  • the viral envelope
  • endospores
  • protein synthesis

Frage 98

Frage
Seventy percent alcohol is effective against
Antworten
  • enveloped viruses
  • noneveloped viruses
  • bacterial endospores
  • protozoan cysts
  • prions

Frage 99

Frage
An instrument that will come into contact with only the skin of a patient should be disinfected with a(n)
Antworten
  • high-level germicide
  • low-level germicide.
  • intermediate-level germicide.
  • degerming agent only.
  • germistatic agent only.

Frage 100

Frage
Which of the following is NOT an effective means of sterilization?
Antworten
  • ionizing radiation
  • incineration
  • lyophilization
  • autoclaving
  • dry heat

Frage 101

Frage
Which of the following describes flash pasteurization?
Antworten
  • heating at 63°C for 30 minutes
  • heating at 72°C for 15 seconds
  • heating at 72°C for 15 minutes
  • heating at 134°C for one second
  • passing liquid through steam at 140°C

Frage 102

Frage
The dairy creamer used in restaurants is usually sterilized by
Antworten
  • filtration
  • ionizing radiation
  • lyophilization
  • UHT sterilization
  • autoclaving

Frage 103

Frage
Boiling water for 10 minutes is effective in ridding it of
Antworten
  • actively growing bacteria
  • enveloped viruses
  • bacterial endospores
  • protozoan cysts
  • both growing bacteria and enveloped viruses

Frage 104

Frage
Which of the following is NOT a feature associated with filtration?
Antworten
  • nitrocellulose or plastic membrane filters
  • sterilization of heat-sensitive materials
  • varying thicknesses of membrane filters used
  • use of HEPA filters to filter air
  • ability of some filters to trap viruses and proteins

Frage 105

Frage
Which of the following is a target of pasteurization?
Antworten
  • Bacillus stearothermophilus
  • Clostridium botulinum
  • Neisseria gonorrhoeae
  • Chlamydia trachomatis
  • Brucella melitensis

Frage 106

Frage
Which of the following types of radiation is nonionizing and has the shortest wavelength?
Antworten
  • ultraviolet light
  • infrared radiation
  • microwaves
  • X rays
  • gamma rays

Frage 107

Frage
Which of the following is used for microbial control in fresh fruits and vegetables?
Antworten
  • X rays
  • ultraviolet
  • electron beams
  • microwaves
  • gamma rays

Frage 108

Frage
Which of the following can be used to disinfect air?
Antworten
  • HEPA filters
  • ethylene oxide
  • ultraviolet light
  • both HEPA and ultraviolet light
  • both ethylene oxide and ultraviolet light

Frage 109

Frage
Lysol is an example of which of the following groups of chemical antimicrobial agents?
Antworten
  • halogens
  • phenolics
  • alcohols
  • aldehydes
  • surfactants

Frage 110

Frage
Which of the following is the most appropriate pairing of microbe and biosafety level?
Antworten
  • E. coli, BSL-3
  • anthrax, BSL-1
  • Ebola, BSL-2
  • methicillin-resistant Staphylococcus aureus (MRSA), BSL-2
  • tuberculosis, BSL-1

Frage 111

Frage
Betadine is an example of which of the following groups of antimicrobial agents?
Antworten
  • alcohols
  • heavy metals
  • halogens
  • phenolics
  • surfactants

Frage 112

Frage
Which of the following statements about quaternary ammonium compounds is FALSE?
Antworten
  • They are a type of detergent.
  • Zephiran is an example of a quat.
  • They are not effective against Pseudomonas aeruginosa.
  • They function by cross-linking proteins.
  • They are harmless to humans except at high concentrations.

Frage 113

Frage
Which of the following is a sterilizing agent?
Antworten
  • ozone
  • hydrogen peroxide
  • peracetic acid
  • dish soap
  • ozone and hydrogen peroxide

Frage 114

Frage
Which of the following was used in the past to prevent the transmission of gonorrhea from an infected mother to her newborn?
Antworten
  • hydrogen peroxide
  • beta-propiolactone
  • thimerosal
  • hexachlorophene
  • silver nitrate

Frage 115

Frage
Which of the following is used to sterilize items that should not, or cannot, be exposed to heat or water?
Antworten
  • ethylene oxide
  • formaldehyde
  • hydrogen peroxide
  • calcium hypochlorite
  • triclosan

Frage 116

Frage
Which of the following statements about aldehydes is FALSE?
Antworten
  • They are used only to preserve dead tissues.
  • They denature proteins.
  • Some aldehydes can sterilize after long periods of exposure.
  • They are usually hazardous to humans.
  • They are used in aqueous solutions.

Frage 117

Frage
Disinfecting agents naturally produced by microorganisms are
Antworten
  • aldehydes
  • antimicrobials.
  • halogens
  • quats
  • triclosans

Frage 118

Frage
A chemical agent that kills pathogenic microbes in general is a(n)
Antworten
  • sanitizer
  • germicide
  • disinfectant
  • fungicide
  • antiseptic

Frage 119

Frage
Which of the following is NOT a desirable characteristic of an ideal antimicrobial agent?
Antworten
  • It is inexpensive
  • It is stable during storage
  • It is harmless to humans
  • It only arrests grows of vegetative cells.
  • It acts quickly

Frage 120

Frage
The endospores of which of the following microbes are used to measure the effectiveness of autoclave sterilization?
Antworten
  • Clostridium botulinum
  • Neisseria gonorrhoeae
  • Bacillus stearothermophilus
  • Pseudomonas aeruginosa
  • Mycobacterium bovis

Frage 121

Frage
A scientist develops a new medication that is a protein compound and that must be administered by injection. Which of the following would be the most effective and safest means of preparing a sterile solution of the new medication?
Antworten
  • autoclaving
  • filtration
  • dilution with alcohol
  • lyophilization
  • ultraviolet irradiation

Frage 122

Frage
Which of the following procedures is currently the standard test used in the United States for evaluating the efficiency of antiseptics and disinfectants?
Antworten
  • use-dilution test
  • microbial death rate
  • in-use test
  • thermal death point
  • phenol coefficient

Frage 123

Frage
Which of the following would be used to sterilize a mattress?
Antworten
  • autoclaving
  • formaldehyde
  • ethylene oxide
  • heavy metals
  • radiation

Frage 124

Frage
Disinfectants that damage membranes include
Antworten
  • alcohol
  • phenolics
  • iodine
  • hydrogen peroxide
  • both alcohol and phenolics

Frage 125

Frage
Which of the following antimicrobial agents is the most toxic to humans?
Antworten
  • 70 % alcohol
  • ethylene oxide
  • quats
  • chloramines
  • iodophors

Frage 126

Frage
The process of filtration is a(n)
Antworten
  • disinfectant method.
  • sterilizing method.
  • sanitization method.
  • antiseptic procedure.
  • ineffective method for removing microbes.

Frage 127

Frage
Hydrogen peroxide is a(n)
Antworten
  • sterilizing agent.
  • disinfecting agent.
  • antiseptic.
  • disinfecting and sterilizing agent.
  • ineffective method of disinfecting.

Frage 128

Frage
The process of incineration is used for
Antworten
  • sterilization
  • disinfection
  • sanitization
  • both disinfection and sanitization
  • degerming

Frage 129

Frage
Alcohols are used for
Antworten
  • disinfection.
  • sterilization.
  • antisepsis.
  • both sterilization and disinfection.
  • both antisepsis and disinfection.

Frage 130

Frage
The chemical agents known as "quats" are used for
Antworten
  • antisepsis
  • disinfection
  • sterilization
  • quantifying antimicrobial activity
  • neither antisepsis nor disinfection

Frage 131

Frage
The compound ethylene oxide is used in
Antworten
  • sanitization.
  • sterilization.
  • antisepsis.
  • degerming.
  • disinfection.

Frage 132

Frage
Glutaraldehyde is used for
Antworten
  • antisepsis.
  • disinfection.
  • sterilization
  • sanitization.
  • both disinfection and sterilization.

Frage 133

Frage
__________ may be achieved using chlorine dioxide.
Antworten
  • Disinfection
  • Sterilization
  • Degerming
  • Antisepsis
  • Both antisepsis and degerming

Frage 134

Frage
Gamma irradiation is a process for
Antworten
  • sterilization.
  • disinfection.
  • antisepsis.
  • degerming.
  • both antisepsis and disinfection.

Frage 135

Frage
__________ can be accomplished using boiling water.
Antworten
  • Sanitization
  • Disinfection
  • Sterilization
  • Antisepsis
  • Both disinfection and sanitization

Frage 136

Frage
Obligate anaerobes have enzymes such as superoxide dismutase to protect them from the damaging effects of oxygen.
Antworten
  • True
  • False

Frage 137

Frage
Nitrogen fixation is a process that occurs in all bacteria.
Antworten
  • True
  • False

Frage 138

Frage
Thermoduric mesophiles are often responsible for spoilage of improperly canned foods.
Antworten
  • True
  • False

Frage 139

Frage
An obligate halophile will burst if placed in freshwater.
Antworten
  • True
  • False

Frage 140

Frage
The only effective way to store bacterial cultures for short periods of time is to arrest their metabolism by freezing.
Antworten
  • True
  • False

Frage 141

Frage
Quorum sensing is a process by which bacteria respond to the density of other bacteria in their environment.
Antworten
  • True
  • False

Frage 142

Frage
An obligate anaerobe can be cultured in a candle jar.
Antworten
  • True
  • False

Frage 143

Frage
Agar is a useful compound in the microbiology lab because it is an excellent nutrient for bacteria.
Antworten
  • True
  • False

Frage 144

Frage
A selective medium can be formulated either by including inhibitory chemical substances or by leaving out a single crucial nutrient.
Antworten
  • True
  • False

Frage 145

Frage
In spectrophotometry, 40% light transmission is the same thing as 60% absorbance of light.
Antworten
  • True
  • False

Frage 146

Frage
Prokaryotic cells are diploid.
Antworten
  • True
  • False

Frage 147

Frage
Prokaryotes have one type of DNA polymerase, which is different from that of eukaryotes.
Antworten
  • True
  • False

Frage 148

Frage
The most common type of mutation is a point mutation.
Antworten
  • True
  • False

Frage 149

Frage
Most bacteria have a natural ability to take up DNA from their environment.
Antworten
  • True
  • False

Frage 150

Frage
The structure of DNA explains both its ability to encode genetic information and the way in which it is copied during cell reproduction.
Antworten
  • True
  • False

Frage 151

Frage
DNA, which is negatively charged, wraps around positively charged histones as part of the packaging of eukaryotic chromosomes.
Antworten
  • True
  • False

Frage 152

Frage
Bidirectional replication means that each strand of a DNA molecule is replicated in the opposite direction from the other.
Antworten
  • True
  • False

Frage 153

Frage
The phenotype of an organism reflects only part of its genotype.
Antworten
  • True
  • False

Frage 154

Frage
In generalized transduction, viruses carry random DNA sequences from one cell to another.
Antworten
  • True
  • False

Frage 155

Frage
DNA polymerase III participates in the dark repair mechanism of DNA mutation repair.
Antworten
  • True
  • False

Frage 156

Frage
An environment may contain some microbes and still be considered sterile.
Antworten
  • True
  • False

Frage 157

Frage
Some viruses are inactivated by the same chemical or physical agents that damage cytoplasmic membranes.
Antworten
  • True
  • False

Frage 158

Frage
UV light has the most effect on protein structure.
Antworten
  • True
  • False

Frage 159

Frage
Antimicrobial agents usually work best at high temperatures and pH levels.
Antworten
  • True
  • False

Frage 160

Frage
The phenol coefficient is one of the most widely used measurements of an antimicrobial agent's effectiveness.
Antworten
  • True
  • False

Frage 161

Frage
No chemical or antimicrobial agents inactivate prions.
Antworten
  • True
  • False

Frage 162

Frage
The decimal reduction time is the time required to kill all the microbes in a given sample.
Antworten
  • True
  • False

Frage 163

Frage
Slow freezing is more damaging to microbial cells than quick freezing.
Antworten
  • True
  • False

Frage 164

Frage
Hydrogen peroxide is an effective antiseptic.
Antworten
  • True
  • False

Frage 165

Frage
By themselves, soaps have only degerming activity, not antimicrobial activity.
Antworten
  • True
  • False
Zusammenfassung anzeigen Zusammenfassung ausblenden

Möchten Sie mit GoConqr kostenlos Ihre eigenen Quiz erstellen? eigenen Mehr erfahren.

ähnlicher Inhalt

Flipped Classroom Modell
Laura Overhoff
Gesetzliche Sozialversicherung
Maximilian Mustermann
Molekulare Genetik
Gökhan Yesilyayla
U1 Buchproduktion
Lena A.
Grundlagen der Stochastik - Zusammenfassung
Flo Rian
WERB Uni Wien 2017/18
Denise Schmid
WT1 Uni Due
Awash Kaul
Vetie - Pharma 2017
Fioras Hu
Vetie Radiologie 2019
Anna Nie
METH STADA SS 2019
Caroline Hannah
Bibliothek durchsuchen