This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Which is true of Entero bacteriacae - 
Select and explain. 
A. All are oxidase negative, B. Nitrate reduction negative, C. Glucose not femented by all, D. Motility by polar flagellum
A: All are oxidase negative
Answer: A: All are oxidase negative 
Explanation: . Ans. is 'a' i.e., All are oxidase negative . Motile by peritrichate flagella (not by polar flagellum) or are non motile. . Glucose is feremented by all but some produce acid and gas, while other produce acid only. . Catalase (+) ye . Oxidase negative . Reduce nitrates to nitrite . May or may not be capsulated. . Are aerobic and facultatively anaerobic.