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Medical Science Mcqs 5254 MCQs [All-Courses]

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

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

Review Detailed Answer

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

Review Detailed Answer

Correct Answer: Lactobacilli

Early invading bacteria in carious lesions are called___________?

A Microcosm

B Pioneer bacteria

C Advancing bacteria

D Anaerobic bacteria

Review Detailed Answer

Correct Answer: Pioneer bacteria

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

Review Detailed Answer

Correct Answer: Frequency of sucrose intake

The enzyme glucosyl transferase secreted by Streptococcus mutans sythesizes glucans from_____________?

A Glucose

B Fructose

C Sucrose

D Lactose

Review Detailed Answer

Correct Answer: Sucrose

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

Review Detailed Answer

Correct Answer: Exist regularly in the dental plaque

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

Review Detailed Answer

Correct Answer: Forms a gelatinous matrix

Which tooth in the permanent dentition is the most susceptible to dental caries ?

A Maxillary 1st premolar

B Maxillary 2nd molar

C Mandibular 1st molar

D Mandibular 2nd molar

Review Detailed Answer

Correct Answer: Mandibular 1st molar

Smooth surface caries is characterized by spread of caries in enamel and dentin as cones. These alignment in enamel and dentin is____________?

A Base to base

B Apex to base

C Apex to apex

D None of the above

Review Detailed Answer

Correct Answer: Apex to base

Oral foci of miller’s are seen in_______________?

A Dental caries

B Lichen planus

C Herpes simplex

D Syphilis

Review Detailed Answer

Correct Answer: Dental caries

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Medical Science Mcqs 5254 MCQs [All-Courses]

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All Topics 5254

The most pronounced effect on the oral microflora of a reduction in rate of salivary flow is a_____________?

Which of the following organisms is found in deep carious lesions rather than in incipient lesions ?

Early invading bacteria in carious lesions are called___________?

The prbable reasons for a high incidence of dental caries in the teenage population relates most directly to______________?

The enzyme glucosyl transferase secreted by Streptococcus mutans sythesizes glucans from_____________?

For a bacterium to be seriously considered in the etiology of dental caries, it must______________?

Streptococcus mutans is considered to be principle etiologic agent of caries because it produces organic acids and it ________________?

Which tooth in the permanent dentition is the most susceptible to dental caries ?

Smooth surface caries is characterized by spread of caries in enamel and dentin as cones. These alignment in enamel and dentin is____________?

Oral foci of miller’s are seen in_______________?