It lies beneath the cell wall. It is also called plasmamembrane. It is about 70 nm in thickness. It is composed of phospholipid and protein . It consist of 60% of protein ,30%of lipid and 10% of carbohydrates. It is differentiated into three layers out of which the two outer layer is 2.5 nm and the middle one is 5 nm .All the combination of cytoplasm of bacteria is similar to Eukaryotic cell, except it lacks sterols. Due to the lack of sterol it has high resistance to antibiotic.
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