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Beta lactam antibacterials work by blocking the crosslinking of peptide chains in the bacterial:

ACell core
BCell film
CCell fluid
DCell wall
Answer & Solution
Correct answer: D. Cell wall
1. Peptidoglycan gives the wall its strength. 2. Blocking crosslinks leaves the wall weak. 3. So they act on the cell wall. _Source: OpenStax Microbiology, Chapter 14, Antimicrobial Drugs._
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