<prompt> Protein synthesis occurs in: September 2012Smooth endoplasmic reticulumRough endoplasmic reticulumGolgi bodiesNucleus  <response>: Ans. B i.e. Rough endoplasmic reticulumRough ERThe surface of the rough endoplasmic reticulum often abbreted RER is studded with protein-manufacturing ribosomes giving it a rough appearance hence its name. 