This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Secretory proteins are synthesized in: \nSelect and explain. \nA. Cytoplasm, B. Endoplasmic reticulum, C. First in cytoplasm and then in Endoplasmic Reticulum, D. First in Endoplasmic Reticulum and then in cytoplasm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Endoplasmic reticulumThe secretory proteins and transpo proteins are synthesized in ribosomes attached to the endoplasmic reticulumQ. Where as proteins which have to be delivered in cytosol are synthesized in free polyribosomes.', 'role': 'assistant'}]