A simple bacterial test for mutagenic carcinogens is________________?

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. Carcinogens induce tumours, they are________________?

   A. Chemicals
   B. Radiation
   C. Viruses
   D. All of the above

3. 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

4. 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

5. Subacute bacterial endocarditis is caused by_____________?

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

6. Bacterial species which is protective or beneficial to the host is_______________?

   A. Streptococcus sanguis
   B. Porphyromonas gingivalis
   C. Treponema denticola
   D. Spirochetes

7. 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

8. The viral action is differentiated from bacterial action by_________________?

   A. Interferon production
   B. Toxin production
   C. Lymphocytes production
   D. Neutrophils production

9. The bacterial resistance to tetracycline is due to___________?

   A. Alteration of drug binding sites
   B. Alteration of dehydrofolate reductase
   C. Inactivation of drug by enzymes
   D. Decreased uptake of drug by bacteria

10. A diffuse spreading inflammatory lesion is due to bacterial enzyme

    A. Coagulase
    B. Hyaluronidase
    C. Peroxidase
    D. Bradykinin