In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: In prokaryotes, these organelles have a sedimentation coefficient of 70, while in eukaryotes it is 80. These organelles are composed of two subunits of unequal size, which consist of proteins and RNA. The rough endoplasmic reticulum is so called because it is covered with these. They decode messenger RNA to produce a chain of amino acids, a process known as translation. For 10 points, name these organelles which assemble proteins.
A:
Science