Streptococcus is classified based on__________________?

Related Mcqs:

1. 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

2. 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

3. Pneumococus can be differentiated from streptococcus by________________?

   A. Type of hemolysis
   B. Gram staining
   C. Growth characteristics
   D. Bile solubility

4. 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

5. 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

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

   A. Glucose
   B. Fructose
   C. Sucrose
   D. Lactose

7. 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

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

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

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

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

10. Condensation shrinkage of porcelain during firing depends on__________________?

    A. Rate of arriving at firing temperature
    B. Uniformity of particle size
    C. Shape and size of particle
    D. Type of investment used