What organelle adds carbohydrate groups to a proteins produced at the endoplasmic reticulum?

Answer;

-Golgi complex

Explanation;

-Golgi complex adds carbohydrate groups to a proteins produced at the endoplasmic reticulum. The Golgi body is an organelle found in most eukaryotic cells.

-The Golgi body has a number of functions, including sorting, processing  packaging of proteins for secretion. It is also involved in the transport of lipids around the cell, and the creation of lysosomes.. Proteins are synthesized in the rough endoplasmic reticulum, then they travel to the Golgi body. While in the Golgi body, they are processed and sent throughout the cell.