What is on the surface of RER?

What is on the surface of RER?

RER (rough endoplasmic reticulum) is an extensive organelle composed of greatly convoluted but flattish sealed sacs, which are contiguous with the nuclear membrane. It is called as ‘rough’ endoplasmic reticulum because it is studded on its outer surface (the surface in contact with the cytosol) with ribosomes.

Why is the RER surface rough?

The rough endoplasmic reticulum (better known as the rough ER or the RER) is a bunch of connected, flattened sacs that help fold up the proteins made by ribosomes during protein synthesis. This is convenient because the surface of the RER is studded with ribosomes. In fact, that’s what makes it rough.

What is the lumen of the ER?

The lumen of the endoplasmic reticulum (ER) is the area enclosed by the endoplasmic reticulum membrane, an extensive network of membrane tubules, vesicles and flattened cisternae (sac-like structures) found throughout the eukaryotic cell, especially those responsible for the production of hormones and other secretory …

Is RER Basophilic?

Since the outer membrane of the RER is studded with ribosomes, it will have a relatively basophilic stain in the cytoplasm when using H&E stains, due to the presence of negatively charged rRNA.

Where does RER occur in both animal and plant cells?

RER occurs in both animal and plant cells. endoplasmic reticulumEndoplasmic reticulum, a continuous membrane system in eukaryotic cells that plays an important role in the biosynthesis, processing, and transport of proteins and lipids.Encyclopædia Britannica, Inc.

Where does the rough endoplasmic reticulum get its name?

Rough endoplasmic reticulum. Rough endoplasmic reticulum (RER), series of connected flattened sacs, part of a continuous membrane organelle within the cytoplasm of eukaryotic cells, that plays a central role in the synthesis of proteins. The rough endoplasmic reticulum (RER) is so named for the appearance of its outer surface,…

Are there two populations of ribosomes in the cytosol?

There are therefore two spatially separate populations of ribosomes in the cytosol. Membrane-bound ribosomes, attached to the cytosolic side of the ERmembrane, are engaged in the synthesis of proteins that are being concurrently translocated into the ER.

Where are proteins synthesized in the RER transported?

Many proteins that are synthesized in the RER are packaged into vesicles and transported to the Golgi apparatus.