According to cell theory, all cells carry out the functions needed to sustain life. That means all cells must contain A) DNA. B) a nucleus. C) organelles. D) a control center.

Organelles are needed for all cells to sustain life. Cell theory states: - that all living things are made of cells - all cells camef rom preexisting cells - and all cells are the basic structure of life. The function or organelles is that it carries the little organs which are needed for specific functions in the body.