Which cellular organelle/part is present in all cells and to maintain homeostasis?

One important organelle that helps maintain homeostasis by moving supplies from one part of the cell to the other is the endoplasmic reticulum.

But,it may also be called Organelle

because an Organelle that helps maintain homeostasis by moving supplies from one part of the cell to the other is the Endoplasmic reticulum.

Hope this helps :)

Pro insulin undergoes extensive posttranslational modification along the production pathway .