what is a cell ?
the cell is the basic building blocks of all living things. the human body is composed of trillion of cells. In the contrast if the DNA is partitioned off in its own membrane-bound room called the nucleus then that cell is a eukaryote. Some eukaryote like amoebae are free living, single-celled entities.
Biology: Cell Structure
makes protiens from DNA directions
carries out cellular respiration which provides energy
Powering the Cell: Mitochondria