SZABMU AHS 2026 Bacteriology Free Quiz 5

1. What is the mechanism of action of streptomycin?

A. Cell wall synthesis B. Protein synthesis C. DNA replication D. RNA transcription

2. How can bacteria acquire antibiotic resistance?

A. Mutations only B. Horizontal gene transfer only C. Both mutations and horizontal gene transfer D. Vertical gene transfer

3. What do beta-lactamase enzymes do?

A. Inhibit protein synthesis B. Break down penicillin C. Increase cell wall permeability D. Modify target sites

4. What is a commensal relationship between bacteria and host?

A. Harmonious association B. Harmful association C. Neutral association D. Parasitic association

5. What type of relationship is parasitic bacteria?

A. Harmonious B. Harmful C. Neutral D. Mutualistic

6. Which classification is based on the cell wall structure?

A. Shape B. Gram reaction C. Motility D. Oxygen requirement

7. Which group of bacteria is characterized by a waxy cell wall?

A. Gram-positive B. Gram-negative C. Acid-fast D. Spore-forming

8. How is bacterial growth commonly measured?

A. Optical density or colony counting B. Microscopy only C. Weight D. pH change

9. What is a bacterial biofilm?

A. Free-floating cells B. Communities in a matrix C. Single cells D. Endospores

10. What is quorum sensing in bacteria?

A. Random gene expression B. Cell-to-cell communication C. Binary fission regulation D. Sporulation