What evidence suggests that proteins are synthesized and modified in the rough ER as opposed to the smooth ER?
A) Ribosomes are associated with the surface of the rough ER.
B) Ribosomes are associated with the surface of the smooth ER.
C) Proteins can be found in the membrane of the rough ER but not the smooth ER.
D) The smooth ER functions in the synthesis of phospholipids.
E) Smooth ER is continuous with rough ER.

Question

Quizplus · Accepted Answer

Ribosomes are associated with the surface of rough ER, indicating that this organelle is involved in protein synthesis. Smooth ER, on the other hand, does not have ribosomes and is primarily involved in lipid metabolism and detoxification.

What Evidence Suggests That Proteins Are Synthesized and Modified in the Rough