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Medical Science Mcqs 5254 MCQs [All-Courses]

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Medical Science is the study of human health, diseases, prevention, and treatment, focusing on diagnosis, patient care, and medical research to improve healthcare outcomes.

All Topics  5254

The corrct order of microscopic zones of dentinal caries starting from the D.E junction is_______________?
A Zone of sclerosis, decalcification zone, bacterial invasion
B Bacterial invasion, decalcification zone, zone of sclerosis
C Zone of sclerosis, backterial invasion, decalcification zone
D Decalcification zone, zone of scierosis, backterial invasion
Correct Answer: Bacterial invasion, decalcification zone, zone of sclerosis
Dental caries is associated with_____________?
A Streptococcus agalactiae
B Streptococcus mutans
C Streptococcus bovis
D Streptococcus anginosus
Correct Answer: Streptococcus mutans
Which of the following is cariogenic ?
A Selenium
B Vanadium
C Strontium
D Molybdenum
Correct Answer: Selenium
Starch is considered to be less cariogenic than monosaccharides and disaccharides because it_______________?
A Does not diffuse through plaque
B Is rapidly hydrolysed in the mouth
C Enhances remineralisation
D Raises the PH in the oral cavity
Correct Answer: Does not diffuse through plaque
The attachment of the Actinomyces species to the tooth surface is facilitated by____________?
A Fimbriae
B Cilia
C Flagella
D Pseudopodia
Correct Answer: Fimbriae
Which of the following factors in the stephan’s curve is related to the caries incidence and sugar intake______________?
A Physical form of sugar
B Frequency of sugar intake
C Ph of Plaque
D Quantity of sugar intake
Correct Answer: Ph of Plaque
Cavity formation in a tooth, due to dental caries is due to______________?
A Destructive potential of streptococcus mutans
B Destructive potential of lactobacillus acidophilus
C Lateral spread of caries along DE junction and weakening of the outer covering enamel
D Mastectomy force and unrelated to the extent of carious process
Correct Answer: Lateral spread of caries along DE junction and weakening of the outer covering enamel
The most pronounced effect on the oral microflora of a reduction in rate of salivary flow is a_____________?
A Significant increase in number of oral bacteria
B Shift towards more acidogenic microflora
C Significant decrease in number of oral bacteria
D Shift towards more aerobic microflora
Correct Answer: Shift towards more acidogenic microflora
Which of the following organisms is found in deep carious lesions rather than in incipient lesions ?
A Streptococci
B Lactobacilli
C Veillonella
D Bateroides
Correct Answer: Lactobacilli
Early invading bacteria in carious lesions are called___________?
A Microcosm
B Pioneer bacteria
C Advancing bacteria
D Anaerobic bacteria
Correct Answer: Pioneer bacteria
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