All of the following antibiotics are BACTERICIDAL EXCEPT one. Which is the exception?

Doxycycline is a bacteriostatic antibiotic — it inhibits bacterial protein synthesis by binding to the 30S ribosomal subunit, preventing growth and reproduction, but does not directly kill bacteria. Beta-lactams (penicillins, cephalosporins) are bactericidal — they inhibit cell wall synthesis causing bacterial death. Key memory: 'Static' = Tetracyclines, Macrolides, Clindamycin, Chloramphenicol, Sulfonamides (mnemonic: STATIC).