The stain used to identify bacteria with a large amount of peptidoglycan in their cell walls is the
A)acid-fast stain.
B)methylene blue stain.
C)Gram stain.
D)negative stain.

Question

Quizplus · Accepted Answer

The Gram stain is used to identify bacteria with a large amount of peptidoglycan in their cell walls. This staining method differentiates between Gram-positive bacteria (which have a thick peptidoglycan layer and appear purple) and Gram-negative bacteria (which have a thin peptidoglycan layer and appear pink). The acid-fast stain is used for detecting bacteria with a waxy cell wall, methylene blue stain is a general stain used for observing bacterial morphology, and negative stain is used to view capsules and spores.

The Stain Used to Identify Bacteria with a Large Amount