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