Question

Describe, in detail, the processes involved in the synthesis and import of secretory proteins in the rough ER.

Answer 1

The synthesis of proteins begins in the cytosol through a process called translation in which protein is assembled from an RNA sequence.As the protein gradually grows ,it contains a signal sequence at its amino terminal end and it will become bound to a signal recognition particle.This particle carries the ribosome to the RER membrane.The signal recognition particle breaks and protein translation continues; once the RER bounded.

Secretory proteins that are released by cells,are packaged in vesicles and move to the golgi apparatus.