A. Forms a gelatinous matrix
B. Metabolizes substrate from saliva
C. Derives energy from enamel constituents
D. Lives symbiolically with lactobacillus
Related Mcqs:
- Initiation of caries by streptococcus mutans is by the production of______________?
A. Dextranase and soluble dextran
B. Insoluble dextan and glucosyl transferase
C. soluble dextan and glucosyl transferase
D. None of the above - Streptococcus mutans produces an adhesive polymer from sucrose, known as:__________?
A. Levans
B. Lectins
C. Glucans
D. Polyfructans - The enzyme glucosyl transferase secreted by Streptococcus mutans sythesizes glucans from_____________?
A. Glucose
B. Fructose
C. Sucrose
D. Lactose - Most used selective medium for streptococcus mutans is:____________?
A. Mac conkey medium
B. Mitus salivarius bacitracin agar
C. Nutrient agar
D. Tellurite medium - All of the following lab tests can be used to distinguish streptococcus mutans from other oral streptococci, except______________?
A. Gram staining
B. Fermentation of mannitol and sorbital
C. Production of intracellular and extracellular adherent polysacharide
D. Colony morphology on saliva agar - 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 - 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 - Progression of dental caries caries on pit and fissure occurs from:
A. Apex of the pit and fissure
B. Wide and of the pit and fissure
C. Lateral surface of the pit and fissure
D. Bottom of the pit and fissure - The class of amino acids that contains only non essential amino acids is_______________?
A. Acidic
B. Basic
C. Aromatic
D. Branched chain - 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
