The smooth endoplasmic reticulum
A) is most abundant in cells specialized for protein secretion
B) gives rise to transport vesicles containing newly synthesized molecules wrapped in a layer of smooth ER membrane
C) consists of stacks of relatively flattened sacs called cisternae
D) has many ribosomes
E) all of these

Question

Quizplus · Accepted Answer

The smooth endoplasmic reticulum (SER) gives rise to transport vesicles containing newly synthesized molecules wrapped in a layer of smooth ER membrane. This process is important for lipid metabolism and the detoxification of drugs and other harmful substances in the cell. The SER does not have ribosomes and is not involved in protein secretion or the formation of cisternae.

The Smooth Endoplasmic Reticulum