<prompt> Secretory proteins are synthesized in:CytoplasmEndoplasmic reticulumFirst in cytoplasm and then in Endoplasmic ReticulumFirst in Endoplasmic Reticulum and then in cytoplasm  <response>: 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. 