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Medical Microbiology- Part 7
See all quizzes of Medical Microbiology- Part 7 here:
1. Cycloserine related to the amino acid in
structure
a. Serine b. Aspergine
c. Alanine d. None of these
2. In Tuberculosis therapy mainly used
antibiotic is
a. Penicillin b. Streptomycin
c. Chloramphenol d. Cycloserine
3. The antibacterial action of penicillin is due
to its effect on
a. Cell membrane permeability
b. Cell wall synthesis
c. DNA synthesis
d. Protein synthesis
4. The antibiotic produced from Bacillus
subtilis is
a. Vancomycin b. Bactiracin
c. Both a and b d. None of these
5. bacitracin sensitivity test is done for
a. Pneunocci
b. Group ‘A’ Streptococci
c. Gonococci
d. Staphylococci
6. The effect of antibiotics on micro organisms
is mainly due to
a. Inhibition of cell-wall synthesis
b. Damage to the cytoplasmic membrane
c. Inhibition of nucleic acid and protein
synthesis
d. All of the above
7. The antibiotic acting on cell wall is
a. Penicillin b. Bacitracin
c. Cyclosporin d. All of the above
8. Erythromycin belongs to chemical class
of antibiotics
a. â-lactose b. Tetracyclines
c. Macrolides d. Aminoglycosides
9. Bacterial resistance to antibiotics is
transmitted by
a. Transduction b. Transformation
c. Mutation d. Plasmids
10. Erythromycin inhibits protein synthesis by
a. Attaching to 30 S ribosome unit
b. Attaching to 50 S unit or ribosome
c. By the attachment to t-RNA
d. By the attachment to m-RNA
11. The function of (THFA) Tetrahydrofolic acid
coenzyme include
a. Amino acid synthesis
b. Thymidine synthesis
c. Protein synthesis
d. Both a and b
12. Resistant to drugs in tuberculosis
develops by
a. Transduction b. Transformation
c. Conjugation d.
13. Which of the following is penicillinase
resistang acid labile penicillin?
a. Amoxycillin b. Cloxacillin
c. Carbenicillin d. Methicillin
14. Which of the following does not inhibit
cell wall synthesis?
a. Penicillin b. Carbenicillin
c. Amikacin d. Vancomycin
15. The anti tumor antibiotics act by inhibiting
a. Cell wall synthesis
b. RNA synthesis
c. Cell membrane synthesis
d. The DNA structure & function
16. Drug resistance to sulphonamides is due
to
a. Production of PABA
b. Folic acid synthetase
c. Drug alteration
d. Low affinity for drug synthesis by bacteria
17. Amoxycillin is combined with clavulanic
acid to inhibit
a. DNA gyrace b. Cell synthesis
c. Protein synthesis d. ?-lactamase enzymes
18. Drug of choice for methicillin resistant
staph. Aureus is
a. Ampicillin b. Erythromycin
c. Neomycin d. Vancomycin
19. Nalidixic acid activity is due to
a. The inhibition of DNA synthesis
b. Inhibition of protein synthesis
c. The inhibition of cell wall synthesis
d. Both b and c
20. The best test for the susceptibility of a
microorganism to antibiotics and other
chemotherapeutic agents:
a. Tube-dilution test b. Paper-disc test
c. Both a and b d. None of these
21. The smallest amount of chemotherapeutic
agents required to inhibit the growth of
the organism in Vitro is known as
a. MIC (minimum inhibitory concentration)
b. Thermal death point (TDP)
c. Death rate
d. None of these
22. Clear-zones formation around antibiotic
disc is due to
a. Growth of the bacterium surrounding of the
disc
b. Lysis of the bacterial cells surrounding the disc
c. The destruction of paper disc (antibiotic)
d. None of these
23. Bacitracin is obtained from
a. B. subtilis b. B. anthracis
c. B. cereus d. B. anthracoid
24. Vancomycin is obtained from
a. Streptococcus species
b. Aspergillus niger
c. Streptomyces orientalis
d. Bacillus anthracis
25. â-lactum antibiotics are
a. Penicillin b. Cephalosporin
c. Both a & b d. None of these