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Biology 13 Online
OpenStudy (anonymous):

Which cellular structure is NOT surrounded by at least one membrane?

OpenStudy (anonymous):

Ribosoms

OpenStudy (anonymous):

Well I think there are many. Ribosomes, Centrioles, ER.

OpenStudy (anonymous):

ER is in fact a single-membrane structure, so it would be wrong in this case..

OpenStudy (blues):

Gamer is right: it depends on the definition of "cellular structure." Was this a multiple choice question without the choices given, by any chance?

OpenStudy (anonymous):

Sure everything is enclosed in a membrane in a cell ( cell membrane ) any specifics??

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