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