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

Related Mcqs:

1. 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

2. 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

3. Most used selective medium for streptococcus mutans is:____________?

   A. Mac conkey medium
   B. Mitus salivarius bacitracin agar
   C. Nutrient agar
   D. Tellurite medium

4. Streptococcus mutans produces an adhesive polymer from sucrose, known as:__________?

   A. Levans
   B. Lectins
   C. Glucans
   D. Polyfructans

5. 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

6. Of the total amount of saliva secreted by all the salivary glands, about 60% is secreted by the_____________?

   A. Parotid glands
   B. Sublingual glands
   C. Submandibular glands
   D. None of the above

7. 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

8. All of the following are true of streptococcus except_____________?

   A. It’s group of lactic acid production bacteria
   B. Shows adherence to dental enamel
   C. Most common in humans
   D. Most common is animals

9. Lancefields classification of B hemolytic streptococcus is based on______________?

   A. M Protein
   B. Polysaccharide C antigen
   C. Type of lipid in cell membrane
   D. Physiological properties

10. Streptococcus is classified based on__________________?

    A. M Protein
    B. Cultural characteristics
    C. Bile Solubility
    D. Cell wall carbohydrate