A Bacterial Cell That Contains an Outer Membrane and Periplasmic

question 28

Multiple Choice

A bacterial cell that contains an outer membrane and periplasmic space stains pink to red on Gram stain.Which one of the following statements explains this discrepancy?

• A)The bacteria were subjected to too much alcohol during the decolorization process,causing the organism to absorb the pink-to-red dye.
• B)The bacteria with an outer membrane and periplasmic space should not be Gram stained because of their cell wall content.
• C)Something is wrong with the lot of stains and may be expired.The Gram stain reagents are most likely expired.
• D)No discrepancy is present;organisms that contain an outer membrane and periplasmic space should stain pink because of their cell wall composition.