The membranes of the endoplasmic reticulum are continuous with the membranes of the
A) nuclear envelope.
B) Golgi apparatus.
C) nucleolus.
D) cell membrane.
E) mitochondria.

Question

Quizplus · Accepted Answer

The endoplasmic reticulum (ER) is directly connected to the nuclear envelope, meaning that the membranes of the ER and the nuclear envelope are continuous. The ER is also connected to the Golgi apparatus and the cell membrane, but not in a continuous manner. The nucleolus is not a membrane-bound organelle and is not connected to the ER. The mitochondria have their own distinct membranes and are not continuous with the ER. Therefore, the best choice is A) nuclear envelope.

The Membranes of the Endoplasmic Reticulum Are Continuous with the Membranes