The basic unit of structure and function of all living organisms is the cell.
Cells are the smallest unit of life and are capable of carrying out all the processes necessary for an organism to survive.
Within a cell, there are different structures like the nucleus, mitochondria, and DNA that play specific roles in maintaining life functions.
For example, the nucleus contains the genetic material (DNA) of the cell, mitochondria produce energy, and DNA carries the instructions for the cell's activities.
Therefore, while mitochondria, DNA, and the nucleus are important components within a cell, the cell itself is the fundamental unit that makes up all living organisms.
