Does the RER only synthesize protein to be transported outside the cell or those within the cell or both?

2 Answers
Nov 27, 2017

Each cell's RER produces proteins to be used by the cell itself and to be secreted


Proteins to be secreted follow the secretory pathway: rough ER → Golgi → secretory vesicles → cell exterior.

Proteins who are to be used by the cell follow the same pathway but without the secretory vesicle and the cell exterior steps.

Nov 28, 2017

In Short
Proteins synthesized by RER is utilised by cell itself , it is not transported outside the cell ( it may be used as the cell membrane protein etc)

While the proteins synthesized by Ribosomes are transported from one place to another according to their demand of protein.