The Living World 8th Edition by George Johnson

تمرين 17

Gram-positive (+) and gram-negative (-) bacteria are characterized by differences in
A) the cell wall: gram-positive have peptidoglycan, and gram-negative have pseudo-peptidoglycan.
B) the plasma membrane: gram-positive have ester-linked lipids, and gram-negative have ether-linked lipids.
C) the cell wall: gram-positive have a thick layer of peptidoglycan, and gram-negative have an outer membrane.
D) chromosomal structure: gram-positive have circular chromosomes, and gram-negative have linear chromosomes.