The differentiating feature of Neisseria gonococcus from Neisseria meningitidis is
Lactose fermentation
Maltose fermentation
Mannitol fermentation
Sucrose fermentation
Gonococci resemble meningococci except that they acidify only glucose and not maltose in serum sugars while meningococci acidify both. Ref: Textbook of microbiology; Ananthanarayan and paniker's; 10th Edition; Pg:234
Bacteriology