This document contains revision questions about the ultrastructure of cells from an AP Biology class. It begins by defining key terms like prokaryotes, eukaryotes, and electron microscopes. It then presents questions about distinguishing light and electron microscope resolution, identifying structures in prokaryote and eukaryote cell electron micrographs, comparing prokaryote and eukaryote cell structures, and detailing the functions of various eukaryotic organelles. Diagrams of cell ultrastructures are provided, and students are asked to label structures, calculate micrograph magnifications, and describe cellular processes like prokaryotic cell division.