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

Question

Quizplus · Accepted Answer

Proteins in the lumen of the ER can indeed be synthesized by ribosomes on the ER membrane (A), can end up in the extracellular space (B), and can be transported to the lumen of an organelle in the endomembrane system (C). However, proteins that end up in the plasma membrane are typically integrated into or associated with the membrane itself, not located within the lumen of the ER. Thus, statement D is false because it inaccurately suggests that luminal proteins can directly integrate into the plasma membrane, overlooking the fact that membrane proteins and luminal proteins have different pathways and destinations.

Which of the Following Statements About a Protein in the Lumen