Overviews cell structure. Begins by distinguishing prokaryotes from eukaryotes and looks at some of the key differences. Are eukaryotes a case of cells within cells? Certain organelles such as mitochondria and chloroplasts appear to bear out an ancient symbiosis. Coverage of metabolism - anabolism - catabolism. The technique of cell fractionation by centrifuge. The program concludes with a lengthy animated tour of the inside of a typical eukaryotic cell.