The response of bacteria that allows them to be identified as Gram-positive or Gram-negative is due to
A)the type of DNA or RNA they contain.
B)their ability or lack of ability to fix nitrogen.
C)whether they are aerobic or anaerobic.
D)whether their cell walls have a thin or thick layer of peptidoglycan.
E)the rRNA sequences they demonstrate.

Question

Quizplus · Accepted Answer

Gram-positive bacteria have a thick layer of peptidoglycan in their cell walls, while Gram-negative bacteria have a thinner layer of peptidoglycan and an outer membrane composed of lipopolysaccharides. This difference in cell wall structure is what allows them to be distinguished using the Gram stain. The other options do not play a direct role in determining Gram staining.

The Response of Bacteria That Allows Them to Be Identified