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#Question id: 34536


Which of the following are true about bacterial cell walls?

#XL - S Microbiology
  1. Gram-positive bacteria have a thick peptidoglycan layer
  2. Gram-negative bacteria possess an outer membrane
  3. Teichoic acids are unique to Gram-negative bacteria
  4. Peptidoglycan provides rigidity and osmotic protection

Answer:- Option(s): 1,2,4


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