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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

Bacteria responsible for initiation of caries is _________________?
A Actinomyces
B Strep. mutans
C Lactobacillus
D Strep. viridans
Correct Answer: Strep. mutans
S. mutans is involved in dental caries initiation Other bacteria also involved is______________?
A S. Sarcinus
B S. macae
C S. sanguis
D S. salivarius
Correct Answer: S. sanguis
Widely accepted theory of dental caries_____________?
A Proteolytic theory
B Proteolytic chelation theory
C Acidogenic theory
D Autoimmune theory
Correct Answer: Acidogenic theory
The number of dentinal zones in dentinal caries is_____________?
A One
B Two
C Four
D Five
Correct Answer: Five
In a patient with reduced salivary flow the carious incidence is_______________?
A More than the patient with normal salivary flow
B less than the patient with normal salivary flow
C unaffected
D None of the above
Correct Answer: More than the patient with normal salivary flow
The extra – cellular polysaccharide sythesized by cariogenic streptococci in the presence of excess sucrose are best described as_______________?
A Mucopolysaccharide
B Dextran-like glucan
C Glycogen – like glucan
D Amylopectin
Correct Answer: Dextran-like glucan
Lactobacilli are numerous in caious lesions because they______________?
A Are the main causative agent
B Can produce insoluble extracellular polysaccharides
C Can attack to smooth enamel surfaces
D Are secondary invaders
Correct Answer: Are secondary invaders
Commonest site for carcinoma of tongue is_____________?
A Lateral margin
B Tip of tongue
C Posterio 1/3
D Ventral surface
Correct Answer: Lateral margin
The most reliable single histologic criterion for diagnosis of oral squamous cell carcinoma is____________?
A Invasion
B Degeneration
C Pleomorphism
D Encpsulation
Correct Answer: Invasion
The most common site for metastasis from carcinoma of cheek_____________?
A Brain
B Regional lymph nodes
C Lung
D Liver
Correct Answer: Regional lymph nodes
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