Memory Cell Theory Essentials Card MatchVersion en ligne Match each cell theory concept with its brief description. par Lyla Haiat From existing cells Ribosomes synthesize proteins All living things are made of cells Two main cell types Contains genetic material Protein production sites Structure and function unit Cells contain genetic material There are two main cell types: prokaryotic and eukaryotic Basic unit of life Cytoplasm hosts many metabolic activities The cell is the basic unit of structure and function Cytoplasm carries processes Cell membrane surrounds cell Cells are bounded by a cell membrane All cells arise from pre-existing cells