Bacterial cell does not possess___________________?

Related Mcqs:

1. Which of the following structures, found external to the bacterial cell wall, are involved in bacterial attachment to cell surfaces?

   A. Capsule
   B. Flagella
   C. Pili
   D. Mesosomes

2. The structure in involved in bacterial attachment to cell surface is_______________?

   A. Capsule
   B. Fimbria
   C. Flagella
   D. None of the above

3. The bacterial cell wall has all of the following properties except______________?

   A. It consists of a mixed polymer called peptidoglycon
   B. It is the structure principally responsible for the reaction of gram staining
   C. It is a unique flexible plastic structure
   D. It contains D-isomers of amino acids

4. Bacterial spores are destroyed by_______________?

   A. Boiling at 100°C
   B. Disinfection by hypochlorite solution
   C. Autoclave
   D. Pasteurisation

5. Zero growth rate is observed during one of the phase of the bacterial growth curve______________?

   A. Lag
   B. Exponential growth
   C. Stationary phase
   D. Decline

6. For uniform staining reaction, morphology and biochemical activity it is advisable to study bacterial cultures during the_____________?

   A. Lag phase
   B. Death phase
   C. Stationary phase
   D. Logarithmic phase

7. A protoplast is best characterized as a bacterial cell______________?

   A. with a cell wall but free of a capsule
   B. containing a cell wall and a capsule
   C. Free of a cell wall and a capsule
   D. Uniquely sensitive to penicillin

8. Electron microscopic examination of the bacterial flora of necrotising ulcerative gingivitis indicates the presence of microorganisms within non-necrotic tissues in advance of other bacteria. The organisms involved are______________?

   A. Cocci
   B. Spirochetes
   C. Bacteriophages
   D. Filamentous rods

9. The following are applicable to bacterial genoms except________________?

   A. It is composed of DNA
   B. It doe not contain histones
   C. It is circular
   D. Its DNA has both introns and extrons

10. Subacute bacterial endocarditis is caused by_____________?

    A. Streptococcus viridans
    B. Haemolytic streptococci
    C. Staphylococcus aureus
    D. Nisseria