Which of the following is a feature of the cell envelope of Gram-negative bacteria?: (A) Teichoic acid present, (B) Lipopolysaccharide Present, (C) Porin proteins are absent, (D) Periplasm absent
Answer is B. FeaturesGram-PositiveGram-NegativePeptidoglycanThick layerThin layerTeichoic acidsPresentAbsentOuter membraneAbsentPresentLipopolysaccharide(endotoxin)AbsentPresentPorin proteinsAbsentPresent; allow passage ofmolecules through the outer membranePeriplasmAbsentPresentRef: Jawetz Medical Microbiology; 27th edition; Page no: 23