Question

What is endoplasmic reticulum?

Answer 1

http://www.softschools.com/science/biology/the_function_of_endoplasmic_reticulum/

Answer 2

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The endoplasmic reticulum is, in essence, the transportation system of the eukaryotic cell, and has many other important functions such as protein folding. It is a type of organelle made up of two subunits – rough endoplasmic reticulum, and smooth endoplasmic reticulum.