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