Protein synthesis occurs in:

Ans. (b) Endoplasmic reticulumRef: Harper s Biochemistry 30,h ed. pg. 576-77* The surface of the rough endoplasmic reticulum is studded with protein-manufacturing ribosomes giving it a "rough" appearance.* The ribosomes bound to ER are not a stable part of this organelle's structure as they are constantly being bound and released from the membrane.* A ribosome only binds to the RER once a specific protein-nucleic acid complex forms in the cytosol. This special complex forms when a free ribosome begins translating the mRNA of a protein destined for the secretory pathway.* Protein once produced from RER will go to golgi apparatus - secretory vesicles - which is further released.