15. Which of the following penicillins is resistant to penicillinase
21. Streptomycin is ineffective in the treatment of infections caused by:
24. The antibacterial activity of tetracyclines is primarily due to:
14. Which β-lactam antibiotic does not contain a fused ring system
4. Which of the following antibiotics is derived from actinomycetes?
10. Clavulanic acid acts as a:
12. Which of the following antibiotics is most susceptible to acid hydrolysis?
9. The 4-membered β-lactam ring is highly reactive due to:
30.Which of the following tetracyclines has the longest half-life and best oral absorption
11. The second-generation cephalosporins are more active against:
18. Which of these aminoglycosides is used orally for bowel sterilization?
6. The core nucleus of Penicillin is:
5. The term "antibiotic" was first coined by
17. Which of the following is not an aminoglycoside?
27. Which of the following tetracyclines is semisynthetic and has enhanced lipophilicity?
22. Kanamycin is obtained from:
28.Tetracyclines degrade in solution by
19. Ototoxicity is a major side effect of which class of antibiotics
16. Aminoglycosides exert their antibacterial action by:
13. What is the main difference between penicillins and cephalosporins structurally?
26.Tetracyclines should not be given with milk because of
8. Cephalosporins are derived from:
3. Selman Waksman is credited with the discovery of:
29.Phototoxicity is a known adverse effect of
23. The basic nucleus of tetracyclines consists of
20. Which of the following is true about the structure of aminoglycosides
25. Which tetracycline is most stable in acidic pH
1. Who discovered Penicillin in 1928?
7. Which of the following is a monobactam?
2. Which of the following terms describes antibiotics produced by microorganisms to inhibit other microorganisms?
