EVERYDAY SCIENCE

Detailed explanation-1: -The rough endoplasmic reticulum (RER) is so named for the appearance of its outer surface, which is studded with protein-synthesizing particles known as ribosomes.

Detailed explanation-2: -RER is arranged in aggregates of flat cisternae that may be found throughout the cytoplasm. It is more frequently distributed in the perinuclear, pericanalicular, and vascular regions of hepatocytes, and it is more abundant in periportal cells than in centrilobular cells.

Detailed explanation-3: -Ribosomes are another type of organelle that are made of ribosomal RNA and protein. Their main function in the cell is to produce protein. Ribosomes can be found in the cytosol or on the rough endoplasmic reticulum.

Detailed explanation-4: -The ribosome that is synthesizing the protein is directly attached to the ER membrane. These membrane-bound ribosomes coat the surface of the ER, creating regions termed rough endoplasmic reticulum, or rough ER (Figure 12-36A).

Detailed explanation-5: -Solution : Rough endoplasmic reticulum (RER) has ribosomes (synthesise proteins) attached on its cytoplasmic surface which make the surface look rough or granular. They are particularly abundant in the cells that synthesise and secrete proteins.