TLS Online TPP Program

#Question id: 34540


Which of the following are true about Gram-negative bacterial cell walls?

#XL - S Microbiology
  1. They have a thin peptidoglycan layer located in the periplasmic space
  2. They contain lipopolysaccharide (LPS) in the outer membrane
  3. Peptidoglycan is directly exposed to the external environment
  4. Porins are present in the outer membrane