What is a Cell with an Extensive Smooth Endoplasmic Reticulum

Question

What is a cell with an extensive smooth endoplasmic reticulum likely to be is specialized in?
A)protein storage
B)synthesis of large quantities of lipids
C)export protein molecules
D)import and export protein molecules
E)communication with other cells

Accepted Answer

The smooth endoplasmic reticulum (SER) is involved in lipid synthesis and metabolism. The extensive presence of SER in a cell suggests that the cell specializes in synthesizing large quantities of lipids. Choice A is incorrect because protein storage is mostly done in the rough endoplasmic reticulum (RER). Choices C, D, and E are also incorrect as they do not involve the synthesis or metabolism of lipids.