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