This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
[{'content': 'Protein synthesis occurs in which part of the cell: \nSelect and explain. \nA. Smooth endoplasmic reticulum, B. Rough endoplasmic reticulum, C. Golgi body, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Rough endoplasmic reticulumRef: Harper\'s Biochemistry, 30th 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.', 'role': 'assistant'}]