Question

What is incorrect about endoplasmic reticulum (ER)?

• A. ER membrane is similar in structure to the plasma membrane.
• B. Only RER is responsible for the membrane biogenesis.
• C. ER serves as channel for the transport of materials within the cell.
• D. RER is rough in appearance due to the presence of ribosomes.

Answer 1

The correct option is B Only RER is responsible for the membrane biogenesis.

Membrane biogenesis is the process of synthesis of cell membrane with the help of proteins and lipids. Since proteins are synthesised by the ribosomes present in RER and lipid by the SER, both SER and RER are responsible for the membrane biogenesis.
The membrane structure of ER is simlilar to the plasma membrane. ER also acts as a channel for the transport of materials between various regions of the cytoplasm or between the cytoplasm and the nucleus.