Test: SAT II Biology M

1.

Which of the following is true of the endoplasmic reticulum? 

The endoplasmic reticulum functions in the transport of materials destined to be endocytosed into the cell. 

The smooth ER contains ribosomes which account for the smooth surface. 

The rough ER is involved in metabolism and lipid synthesis. 

The endoplasmic reticulum is made up of membrane-enclosed spaces used for the trafficking of materials. 

Both the smooth and rough ER are directly involved in protein synthesis. 

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