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Preguntas del test (108)
1Coagulation in litmus milk broth is observed as:
- Apink color
- Bpurple color
- Cmedia solidifying
- Dmedia becoming clear
- Ewhite color
2Kovac's reagent is used to determine if the bacteria can use this compound for food?
- Atryptophan
- Bcasein
- Curea
- Dindole
- Eamylose
3Which of the following will be found in a tube showing a positive test for gelatin
- Agelatin
- Bcasein
- Cgelatinase
- Damylose
- Etryptophan
4What enzyme is found in the clear zone on a (+) milk agar plate
- Acasein
- Bamino acid
- Camylase
- Damylose
- Ecaseinase
5This compound must be added to the bacteria to determine if the organism produces catalase
- Amethyl red
- Bkovacs reagent
- Cwater
- Dhydrogen peroxide
- Eoxygen
6Which of the following is not found in the clear/yellow on a positive starch agar plate
- Aiodine
- Bamylose
- Camylase
- Dglucose
- Eall of the above
7Bacterium A is inoculated into a lactose broth tube. After 24 hour incubation, the media is observed as having a red color, with no air pocket. This means that:
- AThe organism used lactose for food and produce acid and gas
- BThe organism used lactose for food and produced acid but no gas
- Cthe organism did not use lactose for food and produced acid and gas
- Dthe organism did not use lactose for food and produced acid but no gas
- EThe organism did not use lactose for food and did not produce acid or gas
8The MR test for mixed acid fermentation and a (+) result is observed as a ___________ color
- Apink
- Bwhite
- Cred
- Dyellow
- Epurple
9A (+) urea test means that the bacteria can use urea for food and ____________ is produced
- Aammonia
- Bindole
- Camino acids
- Dacid
- Ealcohol
10a citrate slant is inoculated with an unknown bacterium. The media turns blue. did the pH in the media increase or decrease?
- Aincrease
- Bdecrease
11the pH of yogurt was approximately
- A11
- B9
- C7
- D4
- E2
12the active cultures in yogurt are: ( check 2)
- Astaphylococcus
- Bcandida
- Clactobacillus
- Dsaccharomyces
- Estreptococcus
13in the yogurt experiment milk was boiled to:
- Asterilize the product before adding the active cultures
- Bto destroy endospores that could later germinate and cause disease
- Cdissolve the powdered milk
- Dto destroy the nonpathogens that are found in milk
- Eto destroy pathogens that are found in milk
14what was the approximate pH of milk
- A2
- B4
- C7
- D9
- E11
15which microbe was used to ferment the grape juice
- Ae. coli
- Bcandida
- Cmicrococcus
- Dbacillus
- Esaccharomyces
16during the fermentation experiment, the presence of H2S was detected by:
- Ablack colonies on brilliant green agar
- Blead acetate paper turns black
- CpH of the juice was between 3-4
- Dballoon filling with gas
- Ejuice had a smell of rotten eggs
17what gas was collected in the balloon during the fermentation experiment
- Aethanol
- Blactic acid
- Chydrogen sulfide gas
- Dcarbon dioxide
- Eglucose
18this would have occurred if the milk had not been cooled before a teaspoon of yogurt was added
- AThe starter cultures have been killed
- Bfermentation would have occurred
- Cthere would be no effect
19what was the approximate pH of the fermented grape juice
- A1
- B7
- C3
- D9
- E5
20this compound is produced in the fermented grape juice
- Aalcohol
- Bacid
21a water quality presumptive test is performed. all 3 tubes of 10ml lactose broth show (+) reactions. only 2 tubes of the 1 ml lactose broths show (+) reactions and 1 tube of the 0.1 ml lactose broths indicates a (+) reaction. what is the MPN (there is a chart for this)
- A440
- B21
- C150
- D30
- E120
22the results of an IMViC test are +,+,-,-. name the organism
- Ae.coli
- Bstaphylococcus
- Cclostidium
- Dsalmonella
- Eenterobacter
23when doing a confirmed test during the bacterial examination of the water, ENDO agar was used. What is the selective agent in ENDO agar
- Abile salts
- Bbasic fuchsin
- Ceosin
- Dlactose
- Esodium sulfide
24which organism is classified as a sewage indicator
- Acampylobacter jejuni
- BNorwalk virus
- Ce.coli
- De. coli 0157:H7
- Esalmonella enteriditis
25the completed test for water quality is done to see if this organism, which is naturally found in water, was the one fermenting lactose.
- Ae. coli
- Benterobacter aerogenes
- Csalmonella enteriditis
- Dclostiridium difficle
- Estaphylococcus aureus
26a water sample has a preumtive MPN of 1100 and nothing grew on ENDO agar. the water is:
- Acontains E. coli
- Bcontains enterobacter aerogenes
- Ccontains gram (+) bacteria
- Dis not safe to drink
27 EMB agar can be used when doing the confirmed test during the bacteriological examination of water experiment, because it is selective against:
- Afungi
- Be. coli
- Csalmonella
- DGram (-) bacteria
- Egram (+) bacteria
28the bacterial examination of water involved the identification of:
- Anonpathogenic e. coli
- Bsalmonella enteritidis
- Centerobacter aerogenes
- Dstaphylococcus aureus
- Epathogenic e. coli
29which one of the following is not a characteristic of a coliform
- Arod shape
- Buses lactose for food producing acid and gas
- Cnon sporeformer
- Dgram (+)
- Efacultative anaerobe
30e. coli is added to one of the lactose broth tubes that were used in the bacteriological evaluation of water experiment. What result would be observed
- Ayellow color but no air pocket in the durham tube
- Byellow color with an air pocket in the durham tube
- Cred color
31this microbe is important in advancing the decay of enamel
- Ae.coli
- Bstaphylococcus
- Clactobacillus
- Dbacillus
- Emycobacterium
32this factor for determining caries susceptibility is tested for in lab
- Adiet
- Bgenetics
- Cdental hygiene
- Dnumber of acid producing bacteria
33the Snyder caries test is a ___________ test:
- Aquantitive
- Bqualitive
34bromcresol green will turn __________ in the presence of acid
- Ayellow
- Bgreen
35a person with this result would have the most lactobacilli in their saliva
- Anegative
- Bslight
- Cmoderate
- Dmarked
36listeria monocytogenes is a
- Apsychotroph
- Bmesophile
- Cthermophile
- Dpsychophile
- Ehyperthermophile
37microbes growing in compost piles are
- Apsychotroph
- Bpsychophile
- Cmesophile
- Dthermophile
- Ehyperthermophile
38what incubator would be used to grow a thermophile
- A55 degree incubator
- B25 degree incubator
- C37 degree incubator
- Dfridge
- Efreezer
39most human pathogen are
- Amesophiles
- Bthermophiles
- Cpsychtroph
- Dpsychophile
- Ehyperthermophile
40this organism will be found growing on snow
- Apsychophile
- Bmesophile
- Cpsychotroph
- Dthermophile
- Ehyperthermo[ile
41an organism showing the following results is a
5+ 25+ 37+ 45- 55 -- Amesophile
- Bpsychotroph
- Cpsychophile
- Dthermophile
- Ehyperthermophile
42organism showing these results is a
5- 25+ 37+ 45- 55-- Amesophile
- Bpsychotroph
- Cpsychophile
- Dthermophile
- Ehyperthermophile
43how were the agar slants innoculated
- Astab with needle
- Bstab with loop
- Cstreaked on slant surface with needle
- Dstreaked on slant surface with loop
44the majority of psychotrophs are
- Anonpathogens
- Bpathogens
45the temp a microbe will grow best is called the __________ temp
- Amaximum
- Bminimum
- Coptimum
46the Ph of yogurt is approximately 4. the microbes in the yogurt would be classified as
- Aacidophiles
- Bbasophiles
- Cneutrophiles
47the pH of milk is 7. the microbes found in milk would be classified as
- Aneutrophiles
- Bbasophiles
- Cacidophiles
48most human pathogens are
- Aacidophiles
- Bneutrophiles
- Cbasophiles
49what is the pH classification of this organism
3- 5- 7- 9+ 12+- Aacidophile
- Bneutrophile
- Cbasophile
50what is the ph classification of this organism
3+ 5- 7- 9- 12-- Abasophile
- Bneutrophile
- Cacidophile
51microbes growing in the dead sea would be classified as a
- Aobligate halophile
- Bobligate osmophile
- Cfalculative halophile
- Dfalculative osmophile
52plasmoysis will occur when placed in this enviorment
- Ahypertonic
- Bisotonic
- Chypotonic
53most human pathogens will grow best in this enviorment
- Aisotonic
- Bhypertonic
- Chypotonic
54microbes growing on jams and jellies would be classified as
- Aobligate osmophile
- Bobligate halophile
- Cfalculative halophile
- Dfalculative osmophile
55microbe showing these results would be classified as
2.5- 7- 10- 15- 20+ NaCl- Aobligate halophile
- Bobligate osmophile
- Cfalculative osmophile
- Dfalculative anaerobe
- Efalculative halophile
56which of the following is an example of a falculative halophile
- Astaphylococcus
- Bcandida
- Cmicrococcus
- De. coli
- Ebacillus
57this microbe will not be completely destroyed when placed in 80% sucrose
- Astaphylococcus
- Bcandida
- Ce. coli
- Dbacillus
- Emicrococcus
58a cell will swell when its placed in this eniorment
- Ahypertonic
- Bisotonic
- Chyptonic
59microbe with these results would be classified as
2.5+ 7+ 10+ 15+ 20- NaCl- Afalculative osmophile
- Bfalculative anaerobe
- Cfalculative halophile
- Dobligate osmophile
- Eobligate halophile
60which microbe is a falculative osmophile
- Acandida
- Bstaphylococcus
- Cbacillus
- Dmicrococcus
- Ee. coli
61where in a thioglycollate deep tube will a microaerophile grow
- Atop
- Bbottom
- Cthroughout media
- Dat the junction between pink and yellow regions
62what is the function of resazurin
- Areducing agent
- Boxygen indicator
- Ccollects gas
- Dadds oxygen to the tube
- EpH indicator
63what is the function of thioglycollate
- Areducing agent
- BpH indicator
- Coxygen indicator
- Dadds oxygen to the tube
- Ecollects gas
64this group of microbes can grow in the presence and absences of oxygen
- Aaerobe
- Banaerobe
- Cmicroaeorphiles
- Dfalculative anaerobes
65there is a compound in thioglycolate media that removes oxygen. the reason that there is a pink layers on the media is that the lids are not screw cap so oxygen diffuses into the media
- Atrue
- Bfalse
66this system is used to cultivate anaerobes
- ATSA plate
- BPDA plate
- Cgas pak jar
- Dincubator
- Eautoclave
67the methylene blue indicator strip wil be this color in the presence of oxygen
- Ablue
- Bcolorless
- Cgreen
- Dwhite
- Ered
68what 2 gasses are produced with water is added to the gas pak envelope
- Aoxygen
- Bhydrogen
- Cnitrogen
- Dcarbon dioxide
- Ehydrogen sulfide
69wha t compound catalyzes the reaction between hydrogen and free oxygen in the air
- Aesazurin
- Bthioglycolate
- Cpalladium
- Dmethylene blue
- Ewater
70what 2 microbes will not grow in the gas pak jar
- Aaerobes
- Bmicroaerophiles
- Cfalculative anaerobes
- Danaerobes
71a person with xeroderma pigmentosum is highly susceptible to developing:
- Askin cancer
- Bboils
- Cdiabetes
- Dcandidasis
- Egastroenteritis
72in the U.V light experiement, why were the plates covered with foil after being exposed
- Ato kill bacteria
- Bto prevent further exposure to u.v light
- Cto stop the bacteria from repairing themselves
- Dused as a control
- Eto prevent contamination
73what factor was not evaluated in the U.V light experiment
- Awavelength of the U.V light
- Bbacterial type
- Cexposure distance
- Dexposure time
- Epresence of material to block radiation
74the U.V light is used in lab to reduce the number of microbes on/in
- Agoggles
- Bair in the room
- Cinoculating loops
- Dpetri plates
- Epipettes
75what would happen to a lawn of E.coli if the plate was exposed to U.V light for 30 min at a distance of 6in, the lid was not taken off the plate durng the exposure
- Alarge are of bacterial death
- Bsmall area of bacterial death
- Cno area of bacterial death
76thymine dimers form when bacterial cells are exposed to
- Au.v light
- Bhigh temp
- Cantibiotics
- Dantiseptic
- Edisinfectants
77what occurred on the side of the agar covered in paper
- Ano growth
- Bnormal growth
- Cdecreased growth
- Dmutations were observed
78which microbe shows the most resistance to u.v light
- Abacillus
- Bserratia
79U.V light is an example of
- Anonionizing radiation
- Bionizing radiation
80thymine dimers are bonds formed between adjacent:
- Athymine nucleotides
- Badenine necleotides
- Cguanine nucleotides
- Duracil nucleotides
81measuring the diameter of a zone of inhibiton will indicate how susceptible an organism is to a particular antimicrobial. the larger the zone the more __________ the orgranism
- Asensitive
- Bresistant
82mouthwash is an example of a ____________ and bleach is a _________
- Aantiseptic; disenfectant
- Bdisinfectant; antiseptic
- Cantiseptic; antiseptic
- Ddisinfectant; disenfectant
83filter paper disk method was used to test E.coli against disienfectant A. a zone of inhibition is observed and within the zone individual colonies are seen. these colnies indicate that strains of e. coli are __________ to disinfectant A
- Aresistant
- Bsensitive
84chemicals that kill vegetative cells on a fomite are
- Aantiseptics
- Bdisenfectants
85what unit of measurement is used to determine the size of a zone of inhibition
- Acm
- Bmm
- Cinch
- Dmeter
86the Kirby bauer method is a method to evaluate
- Awater quality
- Bantibiotic sensitivity or resisitance
- Cdisinfectant sensitivity or resistance
- Dantiseptic sensitivity or resistance
- Ecaries susceptibility
87which variable in the antibiotic sensitivity experiment was not applied in lab
- Amuellar hinton agar was used
- Bbroth turbidity was measured before innoculation
- Cfilter paper disc are uniform size
- Dthe pH of the medium was between 7.2-7.4
- Ethe agar was poured to a depth of 5mm
88child is taken to doctor and is diagnosed with an ear infection. the microbe is not identified. the child would be prescribed a
- Anarrow spectrum antibiotic
- Bbroad spectrum antibiotic
89which compound can be used as a sterilizing agent
- A95% alcohol
- B3% hydrogen peroxide
- Ctriclosan
- Diodophore
- Ehot concentrated hydrogen peroxide
90triclosan kills microbes. why does it not usually kill the bacteria which are found on a persons hands
- Abacteria are too sensitive to triclosan
- Bcompound is not on an individuals hands long enough to kill the bacteria
- Ctriclosan only have an effect when the filter paper disc method is used
- Dskin inactivated triclosan
91which factor will not influence the action of an antiseptic or disenfectant
- Anumber of microbes present
- Btype of microbe present
- Cnature of material being disenfected
- Dmicrobes resistance to antibiotics
- Econcentration of the agent being used
92the bacteria growing on the control side of the plate in the "evaluation of degerming agents" experiment are:
- Amold
- Bassigned organism
- Cnormal flora
- Dpure culture of staphylococcus
- Epure culture of e. coli
93when a sanitization process is used on silverware; it means the utencils are sterile
- Atrue
- Bfalse
94alcohol was found to be one of the least effective substance tested
- Afalse
- Btrue
95this compound has no antimicrobial effect
- A62% alcohol
- Bplain soap
- Ctriclosan
- Dhydrogen peroxide
- Eiodophor
96a tincture of iodine is iodine mixed with
- Aalcohol
- Bdetergent
- Csoap
- Dwater
- Ebacteria
97what is the most effective concentration of alcohol
- A90%
- B70%
- C60%
- D50%
- E80%
98which microbe will show the greatest resistance to triclosan
- Ae.coli
- Bpsuedomonas
- Cserratia
- Denterococcus
- Estaphylococcus
99these 2 compounds kill gram (+) bacteria on a EMB agar
- Aeosin
- Bmethylene blue
- Clactose
- Dbile salts
- Esodium sulfide
100mannitol salt agar will turn yellow when this organism grows on the agar
- Astaphylococcus aureus
- Bstaphylococcus epidermidis
- Ccandida
- Dsalmonella
- Eserratia marcescens
101which one of the following will not grow on a Hektoen Enteic agar
- Ae. coli
- Bstaphylococcus aureus
- Cserratia marcescens
- Denterobactor aerogenes
- Esalmonella typhiurimem
102how was salmonella detected on a SS agar
- Ablack colonies
- Bred colonies
- Cyellow colonies
- Dcolorless colonies
- Ewill not grow
103this compound is the selective agent in mackonkeys agar
- Abile salts
- Blactose
- Csalmonella
- Dstaphylococcus
- Ee. coli
104sprouts are swabbed and then the brilliant green agar is inoculated. after incubation red colonies surrounded by red zone are observed. the sprouts are contaminated with
- Asalmonella
- Be. coli
- Cstaphylococcus
105grapes are swabbed and then the Hektoen enteric agar is inoculated. after incubation no colnies are observed on the agar. it can be concluded that the grapes are free of bacteria
- Atrue
- Bfalse
106what are the selective agents of the SS agar
- Abile salts
- Bbrilliant green
- Clactose
- Dmethylene blue
- Esodium sulfite
107what are the selective agents in the macConkeys agar
- Alactose
- Bneutral red
- Cbile sats
- Dmannitol
- Ebasic fuchsin
108SS agar is selective against tis group of micobes
- AGRam(+)
- Bgram(-)
Información
- Descripción
- Test sobre Sin título, creado por c f el 26/04/2018.
- Autor
- c f
- Idioma
- English
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- 11
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