All are true about cephalosporins, EXCEPT :
β-lactam antibiotics act by inhibiting cell wall synthesis. These include penicillins, cephalosporins, carbapenems and monobactam.
Ceftazidime is a 3rd generation cephalosporin.
Cefoperazone has got antipseudomonal effect.
Cefoxitin has got no activity against anaerobes.
Cephalosporins act by inhibiting cell wall synthesis.