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1.The plasma membrane  lets specific molecules to move across it. 
2.Capsule  serves to glue cells together
3.Mesosomes come about as expansions of plasma membrane into the cytoplasm of the cells that are deficient in distinct cell nucleus.
4.Flagella are firm  extensions that resemble tails
5.Pili fimbriae are small protein attachments which attach microorganisms to the exteriors