Question

select the part whose main job is to help ribosomes make proteins. smooth endoplasmic reticulum cell membrane centrosome rough endoplasmic reticulum

Explanation:

The rough endoplasmic reticulum has ribosomes attached to its surface and plays a key - role in protein synthesis by helping ribosomes make proteins. The smooth endoplasmic reticulum is involved in lipid synthesis and detoxification. The cell membrane is mainly for cell protection and regulating substance transport. The centrosome is related to cell division.

Answer:

rough endoplasmic reticulum