Indicate whether each of the following descriptions better matches the rough (R) or the smooth (S) endoplasmic reticulum (ER). Your answer would be a five-letter string composed of letters R and S only, e.g. SRSRR.
( ) It mostly has a tubular appearance.
( ) It contains the transitional ER.
( ) It is coated by ribosomes.
( ) It can be specialized for functions such as detoxification and lipid metabolism.
( ) Sarcoplasmic reticulum in muscle cells is one of its specialized forms.

Question

Indicate whether each of the following descriptions better matches the rough (R) or the smooth (S) endoplasmic reticulum (ER). Your answer would be a five-letter string composed of letters R and S only, e.g. SRSRR.
( )	It mostly has a tubular appearance.
( )	It contains the transitional ER.
( )	It is coated by ribosomes.
( )	It can be specialized for functions such as detoxification and lipid metabolism.
( )	Sarcoplasmic reticulum in muscle cells is one of its specialized forms.

Quizplus · Accepted Answer

While the rough ER is mostly made up of stacks coated with ribosomes that are engaged in protein synthesis and import, the tubular smooth ER has specialized functions such as regulation of calcium storage and lipid metabolism.

Indicate Whether Each of the Following Descriptions Better Matches the Rough