What is Endoplasmic Reticulum? Write its types.
The endoplasmic reticulum (ER) is a large network of
membrane-bound tubes and sheets. It looks like long tubules or round. There are
two types of ER– rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum
(SER). RER looks rough under a microscope because it has particles called
ribosomes attached to its surface. The ribosomes, which are
present in all active cells, are the sites of protein manufacture. The
manufactured proteins are then sent to various places in the cell depending on
need, using the ER. The SER helps in the manufacture of fat molecules, or
lipids, important for cell function.
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