A fellow student showed you a Gram stained slide where cell containing thick cell walls were stained pink. What would you tell her about the staining procedure? Why?

Gram-negative bacteria

Explanation:

When the bacteria took pink color (safranine), it means they are gram-negative bacteria. Gram-negative bacteria have thick cell walls it does not take crystal violet stain as its cell wall is thicked. It take-up counterstain safranine and seen pink in the microscope.