Antibiotics that target the cell wall have no effect on the existing peptidoglycan. So how does the antibiotic affect bacterial cells so that the cell walls become weak and the cell lyses?

Which of the following does NOT describe a mechanism of antibiotic resistance among bacteria? enzymes to hydrolyze or chemically alter the antibiotics mutations in target molecules so that antibiotics can no longer bind efflux pumps cell wall diffusion barrier, e.g. Gram-negative outer membrane, Acid Fast cell wall of Mycobacterium O increased synthesis of porins to increase antibiotic diffusion across membranes

Which bacteria produce β-lactamase enzyme which is resistant to penicillin and why?

This is from micro biology. Which box goes under which category