Which of the Following Statements About a Protein in the Lumen

Multiple Choice

Which of the following statements about a protein in the lumen of the ER is FALSE?

A) A protein in the lumen of the ER is synthesized by ribosomes on the ER membrane.
B) Some of the proteins in the lumen of the ER can end up in the extracellular space.
C) Some of the proteins in the lumen of the ER can end up in the lumen of an organelle in the endomembrane system.
D) Some of the proteins in the lumen of the ER can end up in the plasma membrane.