Discussion
Peptidoglycan accounts for __________ of the dry weight of cell wall in many gram positive bacteria
Answer: A
Correct answer: 50% or more
Peptidoglycan makes up half or more of the dry weight of a gram-positive wall, laid down in many layers. In gram-negative bacteria it is a single thin layer, around 10% or less, with the outer membrane accounting for much of the rest. That difference is what the Gram stain detects.
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