Refer to the figure below showing tubular sacs that surround an organelle, synthesize lipids and steroids, and modify toxic molecules for removal. These sacs make up the
A) mitochondrion.
B) endoplasmic reticulum.
C) nucleus.
D) vacuole.
E) cytoskeleton.

Question

Refer to the figure below showing tubular sacs that surround an organelle, synthesize lipids and steroids, and modify toxic molecules for removal.  These sacs make up the
A) mitochondrion. 
B) endoplasmic reticulum. 
C) nucleus. 
D) vacuole. 
E) cytoskeleton.

Quizplus · Accepted Answer

The tubular sacs shown in the figure are a characteristic feature of the endoplasmic reticulum (ER), both smooth ER and rough ER. The smooth ER synthesizes lipids and sterols, while the rough ER modifies proteins and synthesizes membrane proteins. The other options are not supported by the information in the figure.

Refer to the Figure Below Showing Tubular Sacs That Surround