Oral Microbiology Test

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1 / 60

ក្នុងការជ្រាបចូលនៃសារធាតុនិងចំណីអាហាររបស់បាក់តេរីករណី forme complex មុននឹងបាក់ តេរីយកទៅប្រើបានត្រូវការរងការបំបែកដោយ Exoenzyme ជាមុនទើបបានជាម៉ូលេគុលតូចៗ ករណីនេះមានម៉ូលលេគុលមួយចំនួនតូចអាចឆ្លងកាត់ membrame cytoplasmique ដូចជា?

a. CO2 , O2 , acide gras

b. Co2, O2, acide gras, polyose

c. CO2 , O2 , acide gras , Nacl

d. O2 , H2O , Nacl , acide gras

2 / 60

ពពួកបាក់តេរីដែលគ្មាន peptide-glycane តែមាន enveloppe externe និងភ្នាសcytoplasmique ហៅថា ?

a. Mésophile

b. Mycoplasme

c. Protoplastes

d. Sphéroplaste

3 / 60

virusមានទំហំតូចជាង បាក់តេរីចំនួន ?

a. ៩០០ ដង

b. ២០០០ ដង

c. ៨០០ ដង

d. ១០០០ ដង

4 / 60

សេចក្តីត្រូវការផ្នែកថាមពល ( besoins énergétique )សំរាប់ធ្វើសំយោគម៉ូលេគុលដែលជា សារធាតុសំខាន់ក្នុងការបង្កើតថាមពលរបស់បាក់តេរី?

a. carbone , Phosphore , Calcium, ជាតិស្ករ

b. ជាតិស្ករ ,ATP , A cétyl co-A , Glucose-6 Phosphate

c. ATP , ជាតិស្ករ , Calcium , O2

d. carbone , Phosphore , Calcium

5 / 60

ការជ្រាបចូលនៃសារធាតុ និងចំណីអាហាររបស់បាក់តេរី កាលណាសារធាតុជា forme complex មុននិងបាក់តេរីយកទៅប្រើប្រាស់បានត្រូវរងការបំបែកដោយexoenzyme ជាមុនសិន សារធាតុទាំងនោះមាន?

a. Polymère, ATP ,Vitamine

b. Polymére , acide amine, ATP

c. Protéine , polymére, polyose

d. Base pyruvique ,Vitamine, ATP

6 / 60

វិធីសាស្រ្តក្នុងការរំងាប់មេរោគក្នុងមន្ទីរពិសោធន៍មាន?

a. Acide sulfurique ( H2SO4)

b. Flambage

c. Flambage, acide chlorhydrique

d. acide chlorhydrique

7 / 60

Paroi bacterie gram négatif មានលក្ខណៈ?

a. ស្តើង អាល់កុលមិនអាចជ្រាបចូលបាន

b. ក្រាស់ អាល់កុលអាចជ្រាប ហើយ bactérie ពណ៍ខៀវ

c. ស្តើង អាល់កុលអាចជ្រាបហើយ bactérie ពណ៍ខៀវ

d. ស្តើង អាល់កុលអាចជ្រាប ហើយ bactérie ពណ៍ក្រហម

8 / 60

មុខងាររបស់ menbrame cytoplasmique ?

a. ជារបាំងមួយសំរាប់អោយសារធាតុជ្រាបចេញ និង ចូលតាមការអនុញ្ញាតរបស់វា

b. សារធាតុខ្លះត្រូវ menbrame បង្ខំចេញទៅវិញ

c. សារធាតុខ្លះទៀតអាចជ្រៀបចូលបានដូចស្ករ acide

d. សារធាតុខ្លះត្រូវ menbrame អនុញ្ញាតិអោយចេញចូលដូចជាទឹក។

e. All are corrects

9 / 60

សារធាតុណាខ្លះដែលប្រឆាំង និងការរីកលូតលាស់របស់បាក់តេរី?

a. សារធាតុនៃ ពួក antibiotique,នៃ ពពួក Antiseptique ខ្លាំង ,ខ្សោយ and សារធាតុនៃ ពួក Antiseptique ខ្សោយ

b. សារធាតុនៃ ពួក Antiseptique ខ្សោយ

c. សារធាតុនៃ ពួក Antiseptique ខ្លាំង

d. សារធាតុនៃ ពពួក Antiseptique

10 / 60

virusមានរូបរាងមូលដ្ឋានបីបែប?

a. Helical, Icosahedral ,Spirillum (spirals )

b. Icosa,hedral, Complex, Coccus (sphere)

c. Helical, Icosahedral, Complex

d. Complex Helical,Bacillus(rods)

11 / 60

Bactérie ដែលមិនអាចបង្កើត Spore មាន?

a. streptocoque

b. pneumocoque

c. coli bacille

d. Staphylocoque

e. All are corrects

12 / 60

បាក់តេរីប្រភេទ themophile អាចរស់នៅក្នុងសីតុណ្ហភាពជាមធ្យមលើសពី?

a. 30 ˚C

b. 37 ˚C

c. 40 ˚C

d. 20 ˚C

13 / 60

ក្នុងការជ្រាបចូលនៃចំណីអាហាររបស់បាក់តេរី perméase មានប៉ុន្មានប្រភេទ ?

a. 6ប្រភេទ

b. 4ប្រភេទ

c. 3ប្រភេទ

d. 5ប្រភេទ

14 / 60

បរិមាណចំណីអាហារសំរាប់ទ្រទ្រង់ជីវិតបាក់តេរីហៅថា?

a. ration de crosissance and Ration d’entretien

b. ration de crosissance

c. Ration d’entretien

d. Ration totale

15 / 60

បាក់តេរី Aérobies strictes គឺពពួកបាក់តេរីដែលត្រូវរស់ និង លូតលាស់បានដោយ?

a. ត្រូវការតែខ្យល់ O2

b. ត្រូវការខ្យល់O2 និងមិនចាំបាច់ខ្យល់O2 ក៏បាន

c. មិនត្រូវការខ្យល់

d. ត្រូវឧស្ម័នការបូនិក + ខ្យល់ O2

16 / 60

Virus replicate by which of the following?

a. Reproduction.

b. Extracellular

c. Cell division

d. Within a host cell

17 / 60

Members of the genus Lactobacillus are normal microflora of the?

a. Nasopharynx.

b. Mouth

c. Hair

d. Skin

18 / 60

What are the predominant plaque bacteria in healthy condition?

a. Anaerobic cocci (+) and rods (+)

b. Facultative anaerobia cocci (-) and rods (-)

c. Anaerobic cocci (-) and rods (-).

d. Facultative anaerobia cocci (+) and rods (+)

19 / 60

The main difference in true bacteria and mycoplasma is that it does not posses:?

a. Flagella

b. ATP synthesis

c. Cell wall

d. A capsule.

20 / 60

Mouthwashes used for controlling oral malodor should contain?

a. Antibacterial agent

b. Sugar to make them more palatable to consumers

c. Xylitol.

d. Alcohol

21 / 60

In dentoalveolar abscess, the bacteria reach pulp by:?

a. Traumatic exposure during dental treatment

b. Primary herpetic gingivostomatitis.

c. Plaque microorganisms

d. Poor oral hygiene

22 / 60

Which is not true about Ludwig angina?

a. Involves submandibular space

b. May need emergency tracheostomy

c. Caused by an acute or chronic destructive process in periodontium

d. Maintain fluid balance.

23 / 60

Mouthwashes contain several chemical agents to effectively control oral malodor. Select the agent that does not belong in mouthwashes:?

a. Cetylpyridinium.

b. alcohol

c. essential oils

d. Chlorhexidine gluconate

24 / 60

Dentoalveolar abscess is treated by:?

a. Periodontal flap procedure

b. Gingivectomy

c. Drainage through the gingival sulcus or by an external incision.

d. Gingivoplasty

25 / 60

What are the predominant plaque bacteria in periodontitis?

a. Facultative anaerobia cocci (-)

b. Anaerobic rods (-).

c. Anaerobic rods (+)

d. Facultative anaerobia cocci (+)

26 / 60

Turbid dentin in carious tooth is all EXCEPT:?

a. Zone in which collagen is irreversibly denatured

b. Zone that need not be removed before restoration.

c. Zone which cannot be remineralised

d. Zone of bacterial invasion

27 / 60

Predisposing factors for acute necrotizing ulcerative gingivitis include INEXACT:?

a. severe malnutrition

b. heavy smoking

c. immunodeficiency

d. diabetes.

28 / 60

Which of the following statements on dental caries are true?

a. approximately 90% of people over 60 years in the West have root surface caries

b. fissure caries is commonly seen in the lingual surface of the incisors

c. recurrent caries is commonly associated with an existing restoration.

d. signs of fissure caries can be first detected in dentine

29 / 60

Following can be used for cultivation of viruses EXCEPT:?

a. Primary cell

b. Blood agar.

c. Diploid cell line

d. Cell cultures

30 / 60

The human body provides a favorable habitat for microorganisms. Which of the following does not contribute to this favorable habitat?

a. Relatively stable pH.

b. Low levels of moisture

c. Constant source of nourishment

d. Stable temperature

31 / 60

Which of the following statements on diagnosis of dental caries is INEXACTE?

a. Electrical impedance

b. Laser fluorescence

c. Organoleptic assessment.

d. Probing

32 / 60

Which of the following disease most commonly afflicts human?

a. Periodontal abscess.

b. Dentoalveolar abscess

c. Ludwig’s angina

d. Periodontal disease

33 / 60

The dietary carbohydrate most likely involved in etiology of dental caries is 😕

a. Xylitol.

b. Sucrose

c. Polysaccharide

d. Dextran

34 / 60

The main causative agent of Ludwig’s angina is:?

a. Group A streptococci.

b. Porphyromonas

c. Legionella infection

d. Staphylococci

35 / 60

Which of the following bacteria that is predominant in chronic periodontitis?

a. Porphyromonas gingivalis

b. Actinomyces viscsus

c. Prevotella intermedia.

d. Streptococcus sanguinis

36 / 60

Probiotics exhibit all BUT the following characteristics:?

a. Have beneficial effect on host.

b. Nontoxic and nonpathogenic to host

c. Mimic antibiotics

d. Remain viable for a long time

37 / 60

The primary cause of periodontal diseases is?

a. Calculus

b. Dental Plaque

c. Restoration.

d. Malocclusion

38 / 60

Microorganisms play the most essential role.?

a. Streptococcus anginosus.

b. Streptococcus agalactiae

c. Dental caries is associated with:

d. Streptococcus bovis

e. Streptococcus mutans

39 / 60

The peak incidence of juvenile periodontitis in children occurs at ages:?

a. 5-7 years

b. 10-13 years.

c. 1-3 years

d. Birth-6 months

40 / 60

Major bacteria cause aggressive periodontitis?

a. Eikenella corrodens, Capnocytophaga sputigena, Actinobaccilus actinomycetemcomitans, Prevotella intermedia

b. Prevotella intermedia, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae

c. Actinobaccilus actinomycetemcomitans, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae

d. Capnocytophaga sputigena, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae

41 / 60

Antibiotic which is common use to treat anaerobic bacteria 😕

a. Metronidazole

b. Colistin

c. Gentamicin

d. Vancomycin

42 / 60

A bacterium that is usually found in tongue 😕

a. Streptococcus pneumoniae

b. Clostridium difficile

c. Staphylococcus epidemidis

d. Streptococcus mitis

43 / 60

Bacteria usually cause Pericoronitis?

a. Fusiform bacillus, Eikenella corrodens, Alpha-hemolytic Streptococci and Capnocytophaga sputigena

b. Fusiform bacillus , Provetella, Eikenella corrodens and Capnocytophaga sputigen

c. Alpha-hemolytic Streptococci, Provetella, Bacterioides and Capnocytophaga

d. Borrelia vincentii, Bacterioides, Provetella and Eikenella corrodens

44 / 60

Principal Cocci Gram positive bacteria found in oral cavity:?

a. Veillonella

b. Peptostreptococcus

c. Neisseria

d. Moraxella

45 / 60

Among 4 phases of biofilm formation, the phase that is done immediately about 4 hours is:?

a. Phase 1

b. Phase 4

c. Phase 3

d. Phase 2

46 / 60

Strategy to control of rendox potential in oral biofilm:?

a. Oxygenating agents

b. Fluoride

c. Inhibition of key microbial enzyme

d. Stimulate base production

47 / 60

The comment bacterium causes dental caries:?

a. E.coli

b. Pseudomonas aeruginosa

c. Staphylococcus aureus

d. Mutans Streptococci

48 / 60

On tooth surface, bacteria that participate actively in adhesion of primary colonizers?

a. Streptococcus stains

b. Enterococcus stains

c. Staphylococcus stains

d. Pseudomonas stains

49 / 60

The most common bacteria that are always presence in mouth as a normal flora, which proposition is inexact?

a. C. Prevotella

b. A. Streptococcus

c. D. Gonococcus

d. B. Actinomyces

50 / 60

Pathway in order of pathogenesis of oral infection:?

a. Entry of bacteria into soft tissue wall or trauma to the orifice – Formation of infiltrate- Destruction of connective tissues- Pus formation- Decrease tissue resistance and increase number of bacteria with virulence

b. Decrease tissue resistance and increase number of bacteria with virulence- Entry of bacteria into soft tissue wall or trauma to the orifice – Formation of infiltrate- Destruction of connective tissues- Pus formation

c. Entry of bacteria into soft tissue wall or trauma to the orifice – Pus formation- Formation of infiltrate – Destruction of connective tissues – Decrease tissue resistance and increase number of bacteria with virulence

d. Pus formation- Entry of bacteria into soft tissue wall or trauma to the orifice – Formation of infiltrate- Destruction of connective tissues- Decrease tissue resistance and increase number of bacteria with virulence

51 / 60

Which bacteria that is not always presence in saliva:?

a. Streptococcus oralis

b. Streptococcus agalactiae

c. Streptococcus mitis

d. Streptococcus salivarius

52 / 60

Porphyromonas gingivalis:?

a. Are aggressive periodontal pathogens

b. Are isolated from many extra oral sites

c. Are non-capsulated

d. Are Gram-positive pleomorphic rods

53 / 60

Which of the following statement on Actinobacillus actinomycetemcomitans are true?

a. Non-capsulate diplococcic

b. Aggressive forms of periodontal disease in adolescents

c. cigar-shaped bacilli

d. Aggressive forms of dental caries in adolescents

54 / 60

The organisms most commonly associated with root caries are ?

a. Porphyromonas gingivalis

b. Staphylococcus aureus

c. Fusobacterium Nucleatum

d. Actinomyces viscosus

55 / 60

A patient attends the surgery with bilateral swelling of the parotid salivary glands. Which condition are they suffering from?

a. A. Measles

b. Poliomyelitis

c. Mumps

d. Rubella

56 / 60

Primary herpesvirus infections may cause:?

a. Herpes zoster

b. Meningititis

c. Herpes labialis

d. Herpetic gingivostomatitis

57 / 60

AIDS virus is ?

a. Enterovirus

b. DNA virus

c. RNA virus

d. Retro virus

58 / 60

Certain strains of Streptococcus mutans?

a. Cause of periodontal disease by the production of lactic and acids from fermentation of sugars

b. Are cause of infective meningitides

c. Cause dental caries by the production of lactic and other acids, from fermentation of sugars

d. Extracellular glucan production.

59 / 60

Herpagina is usually cause by?

a. Group A coxsackieviruses

b. Group B coxackieviruses

c. Hepatitis A virus

d. Cytomegalovirus

60 / 60

There are some main routes of infection in oral cavity, which one is inexact?

a. Transferred by insects bite.

b. Transferred by hands or objects

c. Transferred through the air on dust particles or water droplets

d. Required by transient flora

Your score is

The average score is 86%

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និស្សិតអាចប្រាប់មកកាន់ពួកយើងបានដើម្បីកែកំហុស ឬអំពីបញ្ហាដោយអចេតនាណាមួយដែលកើតមានកំឡុងពេលធ្វើតេស្ត