Question

The characteristic of Gram - negative bacteria is  

A

Presence of porins

B

>10% lipids in the cell wall

C

Endotoxins

D

All of the above

Hard

Solution

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Correct option is D)

Gram - negative bacteria display the following characteristics: outer membrane containing lipopolysaccharide (which consists of lipid A, core polysaccharide, and O antigen) in its outer leaflet and phospholipids in the inner leaflet; porins exist in the outer membrane, which act like pores for particular molecules; lipoproteins are attached to the polysaccharide membrane.

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