Expert answer:Microbiology – For what specific purpose was gram

  

Solved by a verified expert:Microbiology1.For what specific purpose was gram staining developed for? what is it used for today?2. why is the presence of air bubbles a sign of contamination?3. why is a gram stain helpful when monitoring bacterial contamination in food or investigating a foodborne illness outbreak?4.Do you think bacteria always have to be gram stained in order to view them? why or why not?

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