Answer:
The bacterium has lipopolysaccharide in its outer wall membrane.
Step-by-step explanation:
Gram negative bacteria does't stain in crystal violet and they are characterized by cell envelope,that contain thin peptidoglycan present between inner cytoplasmic cell membrane and a outer membrane contain lipopolysaccharide.
Gram negative bacteria include E.coli,Pseudomonas aeruginosa,Neisseria gonorrhoea,Chiamydia trachomatis,Yersinia pestis.
The outer membrane protects them from antibiotics,detergents,peptidoglycans of inner cell membrane.
They contain flagella which have 4 supporting rings.
Lipoprotein acts as connecting link between outer membrane and peptidoglycan chain.