ribosomes attached to its surface

Endoplasmic Reticulum

Membrane like structure, starts from the nucleus

without ribosomes attached to its surface, contains enzymes

synthesize lipids of cell membrane;
perform detoxification of drugs

Smooth ER

synthesize proteins on the ribosomes, which are later exported from the cell;
modify, or repackage the proteins to make special uses of them for the cell

Rough ER