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What is Beta-lactam ring is present in all of the following except: March 2008 and explain in detail?
Ans. C: Vancomycin The beta-lactam ring is pa of the structure of several antibiotic families, the principal ones being the penicillins, cephalosporins, carbapenems, and monobactams, which are, therefore, also called beta-lactam antibiotics. These antibiotics work by inhibiting bacterial cell wall synthesis. This has a lethal effect on bacteria, especially on Gram-positive ones.