EOG81ZHSZ GO:0004871 1/3 signal transducer activity molecular_function "Conveys a signal across a cell to trigger a change in cell function or state. A signal is a physical entity or change in state that is used to transfer information in order to trigger a response." [GOC:go_curators] EOG81ZHSZ GO:0005739 1/3 mitochondrion cellular_component "A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration." [GOC:giardia, ISBN:0198506732] EOG81ZHSZ GO:0051607 1/3 defense response to virus biological_process "Reactions triggered in response to the presence of a virus that act to protect the cell or organism." [GOC:ai]