<P> Gram - negative bacteria are a group of bacteria that do not retain the crystal violet stain used in the gram - staining method of bacterial differentiation . They are characterized by their cell envelopes , which are composed of a thin peptidoglycan cell wall sandwiched between an inner cytoplasmic cell membrane and a bacterial outer membrane . </P>
<P> Gram - negative bacteria are a group of bacteria that do not retain the crystal violet stain used in the gram - staining method of bacterial differentiation . They are characterized by their cell envelopes , which are composed of a thin peptidoglycan cell wall sandwiched between an inner cytoplasmic cell membrane and a bacterial outer membrane . </P>
the cell wall of gram-negative bacterial cells is external to the
the cell wall of gram-negative bacterial cells is external to the
inner cytoplasmic cell membrane
inner cytoplasmic cell membrane