Question

what is present on endoplasmic reticulum​

Answer 1

Endoplasmic Reticulum is a complex network of tubular membranes exclusively present in the cytoplasm of the eukaryotic cell.

Answer 2

$\huge\colorbox{lime}{Answer}$

a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis.