It is connected to a membrane called the Nucleus
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The Rough Endoplasmic Reticulum is connected to the nuclear membrane and is continuous with the Smooth Endoplasmic Reticulum within the cell. Its distinctive rough appearance is due to the presence of ribosomes on its surface, which are involved in protein synthesis.
Ribosomes are found attached to the rough ER. This is what gives the ER a bumpy appearance and therefore the name rough ER
They're seperate organelles, but they are connected by a membrane separating the two.
The rough ER appears rough due to the presence of ribosomes on the membrane surface.
No, they do not. Prokaryotic cells have no membrane-bound organelles such as rough endoplasmic reticulum. The 70s ribosomes found in prokaryotic cells are therefore free in the cytoplasm as opposed to attached to the rough endoplasmic reticulum.
Membrane, ribosomes, lysosomes, nucleus, nucleolus, smooth ER, rough ER, mitochondria
Rough endoplasmic reticulum is called rough because they contain ribosomes. It also contains many connected membranes, which resemble folded ribbons.