All of the following are true of streptococcus except_____________?

Related Mcqs:

1. 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

2. 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

3. Streptococcus is classified based on__________________?

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

4. Pneumococus can be differentiated from streptococcus by________________?

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

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. All the following features of skull of a newborn are true except_____________?

    A. Diploe not formed
    B. Styloid process has not fused with rest of temporal bone
    C. Anterior fontanelle open
    D. Mastoid process is of adult size