Medical MCQs

5099 MCQs  (Page 303 of 510)

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The dietary carbohydrate most likely involved in etiology of dental caries in man is____________?
A. Glucose
B. Sucrose
C. Dextran
D. Polysaccharide
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What is the PH at which initiation of caries begin ?
A. 4.3-4.5
B. 5.2-5.5
C. 4.9-5.1
D. 3.5-4.5
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In the earliest stages of carious lesion. There is loss of______________?
A. Enamel cuticle
B. Interprismatic substance
C. Organic matrix
D. Enamel lamellae
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Least cariogenic among these______________?
A. Raw starch
B. Cooked starch
C. Sucrose
D. Fructose
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Streptococcus mutans is considered to be principle etiologic agent of caries because it produces organic acids and it ________________?
A. Forms a gelatinous matrix
B. Metabolizes substrate from saliva
C. Derives energy from enamel constituents
D. Lives symbiolically with lactobacillus
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For a bacterium to be seriously considered in the etiology of dental caries, it must______________?
A. Exist regularly in the dental plaque
B. Produce extracellular amylopectins
C. Be lethal for gnotobiotic animals
D. Produce intracellular dextrans
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The enzyme glucosyl transferase secreted by Streptococcus mutans sythesizes glucans from_____________?
A. Glucose
B. Fructose
C. Sucrose
D. Lactose
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The prbable reasons for a high incidence of dental caries in the teenage population relates most directly to______________?
A. Rapid growth
B. Frequency of sucrose intake
C. Negligence in visiting the dentist
D. Carelessness in oral hygiene habits
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Early invading bacteria in carious lesions are called___________?
A. Microcosm
B. Pioneer bacteria
C. Advancing bacteria
D. Anaerobic bacteria
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Which of the following organisms is found in deep carious lesions rather than in incipient lesions ?
A. Streptococci
B. Lactobacilli
C. Veillonella
D. Bateroides
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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