Question

Define membrane biogenesis . where do lipids and proteins constituting the plasma membrane get synthesis

Answer 1

Proteins are synthesized in REAR and lipids in SER.
These proteins and lipids help in building the cell membrane. This process is called membrane biogenesis

Answer 2

Membrane biogenisis is a process which involves the synthesis of specific molecular components and thereby the building up of cell membrane by synthesising ghe lipids and protiens.
Lipids constituting the plasma membrane get synthesised in SER (smooth endoplasmic reticulum) and proteins in RER (rough endoplasmic reticulum).