What are the components of prokaryotic cells? Where do you find plasmids? Give one function of plasmid.

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Please find below the solution to the asked query   
        
Prokaryotic cell contains plasma membrane, cytoplasm, DNA (nucleoid), ribosomes, flagellum, pili etc. 
A plasmid is completely closed circular DNA molecule present in bacteria, which is extrachromosomal and autonomously replicated.
Function - It is commonly used as a vector in recombinant DNA technology.

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