Microbiologists Use the Gram Stain to Aid in the Identification

Multiple Choice

Microbiologists use the Gram stain to aid in the identification of bacteria. What is the major difference between Gram-positive and Gram-negative bacteria?

A) structure of nucleotides in the plasma membrane
B) presence or absence of muramic acid in the cell wall
C) presence or absence of peptidoglycan in the cell wall
D) presence or absence of outer plasma membrane