The membrane of the endoplasmic reticulum (ER) is continuous with the outer layer of the nuclear envelope. Like the plasma membrane, the nuclear envelope is a phospholipid bilayer. The molecules, then, that form the ER membrane are phospholipid molecules. The membranes of the rough ER (RER) ... read more
Biomolecules of Ribosomes Cells are filled with a network of tubules and vesicles called the endoplasmic reticulum. Ribosomes form spherical structures that can be found freely floating within the cytoplasm as well as bound to proteins on the endoplasmic reticulum. read more