Which of these is an important difference between the rough endoplasmic reticulum and the smooth endoplasmic reticulum?

A) The rough endoplasmic reticulum is the site of much protein folding and packaging, whereas the smooth endoplasmic reticulum is the site of lipid synthesis.
B) The smooth endoplasmic reticulum is the site of protein synthesis, folding, and packaging, whereas the rough endoplasmic reticulum is the site of lipid synthesis.
C) The rough endoplasmic reticulum is studded with chloroplasts, whereas the smooth endoplasmic reticulum is not.
D) The rough endoplasmic reticulum is covered in cilia, whereas the smooth endoplasmic reticulum is not.
E) The rough endoplasmic reticulum is the site of lipid synthesis, whereas the smooth endoplasmic reticulum is the site of digestion and recycling of cellular waste.


A) The rough endoplasmic reticulum is the site of much protein folding and packaging, whereas the smooth endoplasmic reticulum is the site of lipid synthesis.

Biology & Microbiology

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