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