<prompt> Which of the following is a feature of the cell envelope of Gram-negative bacteria?Teichoic acid presentLipopolysaccharide PresentPorin proteins are absentPeriplasm absent  <response>: FeaturesGram-PositiveGram-NegativePeptidoglycanThick layerThin layerTeichoic acidsPresentAbsentOuter membraneAbsentPresentLipopolysaccharideendotoxinAbsentPresentPorin proteinsAbsentPresent; allow passage ofmolecules through the outer membranePeriplasmAbsentPresentRef: Jawetz Medical Microbiology; 27th edition; Page no: 23 