Oral Microbiology Test 0% 0 votes, 0 avg 640 You will have 60 minutes to complete all the questions. After the timer reaches 60 minutes, the exam will end and be saved automatically. Good luck! *Fingers crossed* The timer has been reached. The exam has now been terminated and saved. Oral Microbiology Test 1 / 60 Which genus of bacterium contributes to plaque, caries, gingivitis, and periodontal disease? a. Staphylococcus b. Bacillus. c. Streptococcus d. Escherichia 2 / 60 The main causative agent of Ludwig’s angina is:? a. Staphylococci b. Legionella infection c. Group A streptococci. d. Porphyromonas 3 / 60 Which of the following statements on chronic periodontitis is INEXACTE? a. Prevalence and severity decrease with age b. Morbidity 70–80% c. 95% of all periodontal diseases. d. Most prevalent disease globally 4 / 60 An abortive infection is one in which: ? a. Transplacental infection of the fetus occurs b. Cell multiplication is stopped. c. The infected cells are killed d. Progeny virus is not produced 5 / 60 Probiotics exhibit all BUT the following characteristics:? a. Remain viable for a long time b. Nontoxic and nonpathogenic to host c. Have beneficial effect on host. d. Mimic antibiotics 6 / 60 True about caries, all EXCEPT:? a. Chronic endogenous infection b. Demineralization of enamel. c. Not due to microorganisms d. Microorganisms play the most essential role 7 / 60 Which of the following disease most commonly afflicts human? a. Periodontal disease b. Periodontal abscess. c. Ludwig’s angina d. Dentoalveolar abscess 8 / 60 Gram staining reflects in bacteria? a. differences in bacterial metabolism b. differences in the cell wall structure c. presence or absence of nucleus. d. differences in the bacterial plasmatic membrane 9 / 60 Virus replicate by which of the following? a. Extracellular b. Reproduction. c. Within a host cell d. Cell division 10 / 60 What are the predominant plaque bacteria in periodontitis? a. Facultative anaerobia cocci (-) b. Facultative anaerobia cocci (+) c. Anaerobic rods (-). d. Anaerobic rods (+) 11 / 60 Initiation of dental caries depends upon:? a. Localisation of acid over tooth surface. b. formation of large amount of acid c. viscosity of saliva d. availability of carbohydrate food 12 / 60 Aggressive periodontitis is treated by:? a. Amoxicillin 500 mg 3 times/day for 2 weeks. b. Penicillin 500 mg 3 times/day for 3 weeks c. Tetracycline 250 mg 3 times/day for 4 weeks d. Metronidazole 250 mg 3 times/day for 1 weeks 13 / 60 Bacterial pathogens attach most often by all except which of the following mechanisms? a. Glycocalyx. b. Adhesins c. Fimbriae (pili) d. Spikes 14 / 60 Microorganism that can grow in the presence as well as in the absence of molecular oxygen is? a. microaerobically b. obligatory anaerobic c. obligatory aerobic d. facultatively anaerobic. 15 / 60 In dentoalveolar abscess, the bacteria reach pulp by:? a. Plaque microorganisms b. Primary herpetic gingivostomatitis. c. Poor oral hygiene d. Traumatic exposure during dental treatment 16 / 60 Which of the following statements on dentoalveolar abscess is true? a. it often resolves without antibiotics after adequate drainage. b. it is a infection of sublingual and submandibular spaces c. it is often precipitated by bacteria from the systemic route (anachoresis) d. it is frequently implicated as a cause of brain abscess 17 / 60 What are the predominant plaque bacteria in gingivitis? a. Facultative anaerobia cocci (-) and Anaerobic rods (-) b. Facultative anaerobia cocci (+) and Anaerobic rods (-) c. Anaerobic cocci (-) and Facultative anaerobia rods (-). d. Anaerobic cocci (+) and Facultative anaerobia cocci rods (+) 18 / 60 Lysozyme is present in? a. Urine b. Cerebro spinal fluid (CSF) c. Sweat d. Saliva. 19 / 60 With regard to prevention of dental caries, which of the following statements are true? a. substituting cariogenic artificial sweeteners b. remineralization of early lesions can be accomplished by fluoridated toothpaste. c. water fluoridation, though effective, leads to other major systemic illnesses d. probiotic therapy with ‘cariogenic’ bacteria is the most promising approach 20 / 60 Which of the following bacteria that is predominant in aggressive periodontitis? a. Porphyromonas gingivalis b. Prevotella intermedia. c. Streptococcus sanguinis d. Aggregatibacter actinomycetemcomitans 21 / 60 Caries, all are true except:? a. Smooth surface caries occur due to streptococcus mutans b. Pit and fisssure caries can be prevented by using pit and fissure sealants c. Lactobacillus is the main causative organism in plaque d. Fluorides help in reducing caries incidence. 22 / 60 The most common protozoa in the oral cavity of people ? a. Giardia lamblia. b. Entamoeba histolytica c. Trichomonas tenax d. Giardia muris 23 / 60 A bacterium from buccal mucosa that can cause lung infection in chronic obstructive pulmonary infections in cystic fibrosis patients is:? a. Streptococcus pneumoniae b. Mycobacterium tuberculosis c. Klebsiella pneumoniae d. Pseudomonas aeruginosa 24 / 60 The most common bacterium that is responsible for tonsillitis and pharyngitis is:? a. Streptococcus mutans b. Group-A beta hemolytic Streptococcus ( Streptococcus pyogenses) c. Group-B beta hemolytic Streptococcus ( Streptococcus agalactiae) d. Streptococcus mitis 25 / 60 A bacterium that is usually found in tongue 😕 a. Streptococcus mitis b. Clostridium difficile c. Staphylococcus epidemidis d. Streptococcus pneumoniae 26 / 60 Principal Rods Gram negative bacteria found in oral cavity:? a. Corynebacterium b. Lactobacillus c. Porphyromonas d. Eubacterium 27 / 60 Infection in oral cavity by oral flora, which proposition is inexact? a. Administration of antibiotics b. Changes in salivary flow c. Changes in exposure to antiseptic d. Changes in the immune system 28 / 60 Major bacteria cause chronic periodontitis:? a. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Streptococcus anginosus b. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, E.coli c. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae,Stphylococcus aureus d. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Pseudomonas aeruginosa 29 / 60 The comment bacterium causes dental caries:? a. E.coli b. Staphylococcus aureus c. Pseudomonas aeruginosa d. Mutans Streptococci 30 / 60 Bacteria usually cause Necrotizing Ulcerative Gingivitis? a. Borrelia vincentii and Eikenella corrodens b. Borrelia vincentii and Porphyromonas endodontalis c. Fusiform bacillus and Borrelia vincentii d. Fusiform bacillus and Capnocytophaga sputigena 31 / 60 Strategy to control of biofilm pH in oral biofilm:? a. Generating nutrients b. Antiflammatory agents c. Inhibition of key microbial enzyme d. Fluoride 32 / 60 Among 4 phases of biofilm formation, the phase that is done the longest, about 7-14 days is:? a. Phase 3 b. Phase 1 c. Phase 4 d. Phase 2 33 / 60 Major bacteria usually cause dental caries:? a. Streptococcus pneumoniae, Lactobacilli, Actinomyces vicosus b. Mutans Streptococci, Lactobacilli, Clostridium c. Mutans Streptococci, Staphylococcus aureus, Actinomyces vicosus d. Mutans Streptococci, Lactobacilli, Actinomyces vicosus 34 / 60 Analytical techniques for monitoring biofilms by “Indirect detection” 😕 a. Detection of DNA by molecular biology technique b. High Pressure Liquid Chromatography (HPLC) c. Detection of proteins by molecular biology technique d. Microscopy techniques 35 / 60 Antimicrobial against Porphyromonas gingivalis is 😕 a. Kanamycin b. Erythromycin c. Metronidazole d. Vancomycin 36 / 60 ការជ្រាបចូលនៃសារធាតុនិង ចំណីអាហាររបស់បាក់តេរី កាលណាវាជា forme simple អាចជ្រាប ចូលដោយត្រង់ៗដូចជាសារធាតុ? a. Acetyl-CoA b. ATP , glucose c. Acide amine , ជាតិស្ករ d. glucose, ATP ,Acide amine 37 / 60 បាក់តេរីប្រភេទ themophile អាចរស់នៅក្នុងសីតុណ្ហភាពជាមធ្យមលើសពី? a. 30 ˚C b. 40 ˚C c. 20 ˚C d. 37 ˚C 38 / 60 បាក់តេរីប្រភេទ Mésophile អាចរស់នៅក្នុងសីតុណ្ហភាព? a. 10-20 ˚C b. 10-15 ˚C c. 40-50 ˚C d. 20-40 ˚C 39 / 60 សេចក្តីត្រូវការផ្នែកថាមពល ( besoins énergétique )សំរាប់ធ្វើសំយោគម៉ូលេគុលដែលជា សារធាតុសំខាន់ក្នុងការបង្កើតថាមពលរបស់បាក់តេរី? a. ជាតិស្ករ ,ATP , A cétyl co-A , Glucose-6 Phosphate b. carbone , Phosphore , Calcium, ជាតិស្ករ c. ATP , ជាតិស្ករ , Calcium , O2 d. carbone , Phosphore , Calcium 40 / 60 Paroi bactérie gram positif មានលក្ខណៈ? a. ក្រាស់ មិនអាចជ្រាបអាល់កុល ហើយ bactérie ពណ៍ស្វាយ b. ក្រាស់ មិនអាចជ្រាបអាល់កុល ហើយ bactérie ពណ៍ក្រហម c. ក្រាស់ អាចជ្រាបអាល់កុល bactérie ពណ៍ស្វាយ d. ស្តើង មិនជ្រាបអាល់កុល ហើយ bactérie ពណ៍ស្វាយ 41 / 60 បាក់តេរីដែលធ្វើអោយពុលដល់ចំណីអាហារកំប៉ុងឈ្មោះអ្វី ? a. Clostridium b. Pneumcoque c. Staphylocoque d. Streptocoque 42 / 60 Paroi នៃបាក់តេរី Gram negatif ផ្សំឡើងដោយ? a. uréine+gelatin b. céramique c. gelatin d. Mucopeptide 43 / 60 Paroi bacterie gram négatif មានលក្ខណៈ? a. ស្តើង អាល់កុលអាចជ្រាបហើយ bactérie ពណ៍ខៀវ b. ក្រាស់ អាល់កុលអាចជ្រាប ហើយ bactérie ពណ៍ខៀវ c. ស្តើង អាល់កុលអាចជ្រាប ហើយ bactérie ពណ៍ក្រហម d. ស្តើង អាល់កុលមិនអាចជ្រាបចូលបាន 44 / 60 ពួកបាក់តេរី pseudomonas អាចរស់នៅក្នុង milieu ? a. milieu acide + base b. milieu acide c. milieu base d. All are corrects 45 / 60 សេចក្តីត្រូវការផ្នែករូបធាតុក្នុងតំរូវការតិចមាន? a. S . P . Fe b. Ca , Mg , K, S , P , Fe c. C. H . O2 .Z d. Ca . Mg . K 46 / 60 បាក់តេរី Aérobies strictes គឺពពួកបាក់តេរីដែលត្រូវរស់ និង លូតលាស់បានដោយ? a. ត្រូវឧស្ម័នការបូនិក + ខ្យល់ O2 b. ត្រូវការខ្យល់O2 និងមិនចាំបាច់ខ្យល់O2 ក៏បាន c. មិនត្រូវការខ្យល់ d. ត្រូវការតែខ្យល់ O2 47 / 60 បរិមាណចំណីអាហារសំរាប់សាងសង់និង ដើម្បីថាមពលហៅថា? a. Ration d’entretien and Ration totale b. Ration totale c. Ration d’entretien d. ration de croissance 48 / 60 នៅក្នុង condition physico-chimique de la croissance របស់បាក់តេរីក្នុងល័ក្ខខណ្ឌ័ Perssions partielles d’oxygène គេបែងចែកបាក់តេរីជាច្រើនប្រភេទ? a. Aérobies-anaérobie facultative b. Aérobies strictes , Micro-aérophiles, anaérobies stricte c. Mésophile + Micro-aérophiles,anaérobies stricte d. Aérobies-anaérobie facultative and érobies strictes , Micro-aérophiles, anaérobies stricte 49 / 60 យើងប្រើ Microscope optique ពិនិត្យក្រោយដាក់ព៌ណ ៖ អាចពិនិត្យយ៉ាងច្បាស់លាស់ពីរូបរាង និង ចំណុចសំខាន់ៗ ។ អាចដឹងពីរចនាសម្ព័ន្ធ អាចដឹងពី? a. បាក់តេរី Grams négatif b. ពីចលនា (mobilité ) រូបរាង ( forme ) c. បាក់តេរី Grams positif ឬ Grams négatif d. បាក់តេរី Grams positif 50 / 60 គេអាចសិក្សាដឹងពីរូបរាងបាក់តេរីរាងមូល ទ្រវែង និង រាងអង្កាញ់ៗ ដោយសារ? a. glycocalix នៃបាក់តេរី b. Paroi នៃបាក់តេរី c. Capsule នៃបាក់តេរី d. noyau នៃបាក់តេរី 51 / 60 Protoplaste គឺជាបាក់តេរីដែល? a. គ្មានស្រោម + paroi, peptido-glycane et envelope extene ព័ទ្ធជុំវិញដោយ menbrame cytoplasmique តែមួយគត់ ។ b. គ្មាន ស្រោម + paroi peptido-glycane et envelope extemne cytoplasmique ជាច្រើន។ c. មានស្រោម + paroi peptide-glycane et enveloppe externe ព័ទ្ធជុំវិញដោយ menbrame cytoplasmique តែពីរគត់ ។ d. មានស្រោម + paroi + enveloppe អត់មាន cytoplasme 52 / 60 ក្នុងការជ្រាបចូលនៃចំណីអាហាររបស់បាក់តេរី perméase មានប៉ុន្មានប្រភេទ ? a. 6ប្រភេទ b. 3ប្រភេទ c. 4ប្រភេទ d. 5ប្រភេទ 53 / 60 បាក់តេរីប្រភេទ psychrophile អាចរស់នៅក្នុងសីតុណ្ហភាពជាមធ្យម? a. ក្រោម 40 ˚C b. លើសពី 30 ˚C c. លើសពី 20 ˚C d. ក្រោម 20 ˚C 54 / 60 Anaérobies strictes គឺពពួកបាក់តេរីដែលអាចរស់ និងលូតលាស់បានទាល់តែ? a. មានខ្យល់ O2ច្រើន b. មានខ្យល់ O2 ល្មម c. គ្មានខ្យល់ O2 សោះ d. មានខ្យល់ O2 តិច 55 / 60 Which of the following statements on Prevotella Intermedia are true:? a. Microaerophilic b. Black pigmented Gram-positive c. Implicated in periodontal disease in association with P. gingivalis d. Implicated in dental Caries in association with Aggregatibacter actino- mycetemcomitans. 56 / 60 Which microorganism implicated in pit and fissure caries? a. Staphylococcus aureus b. Streptococcus mitis c. Actinimyces viscosus d. Streptococcus mutans 57 / 60 Various viral infections are of relevance to the dental team, including those that cause disease affecting the head neck region. Which one of the following viruses causes cold sores? a. Herpes simplex b. Herpes zoster c. Paramyxovirus d. Epstein-Barr 58 / 60 Which of the following organisms is most likely to be implicated in dental caries? a. Staphylococcus epidermidis b. Escherichia coli c. Streptococcus sorbinus d. Staphylococcus aureus 59 / 60 Porphyromonas gingivalis:? a. Are isolated from many extra oral sites b. Are non-capsulated c. Are Gram-positive pleomorphic rods d. Are aggressive periodontal pathogens 60 / 60 Fusobacterium Nucleatum 😕 a. Produce proinflammatory cytokines and up-regulating the inflammatory response b. Gram-positive, strictly anaerobic c. Non capsulate diplococci d. Isolated from monomicrobial infections Your score isThe average score is 84% Facebook 0% Restart quiz Any comments? Send feedback
