Porins: O control what can pass through the gram negative cell wall O transport molecules through the plasma membrane via facilitated diffusion are found in the peptidoglycan attach peptidoglycan...

Extracted text: Porins: O control what can pass through the gram negative cell wall O transport molecules through the plasma membrane via facilitated diffusion are found in the peptidoglycan attach peptidoglycan layer of cell wall to the plasma membrane are unique to gram positive bacteria