Rough endoplasmic reticulum (RER) | Smooth endoplasmic reticulum (SER) |
The endoplasmic reticulum bearing ribosomes on their surface is known as RER. | The endoplasmic reticulum that do not bears ribosomes and appear smooth are known as SER |
These are actively involved in the protein synthesis | These are major site for the synthesis of lipids. |
It transports proteins to the different destination like plasma membrane | It maintains the calcium ion concentration in the cytosol. |