SOLUTION :
The original copy of the information, including the instructions for creating the proteins and other chemicals that keep cells functioning, is found in DNA. Without it, cells wouldn’t be able to multiply and produce the molecules they require to exist, which would cause them to die. Now, the process by which two cells are created from one cell is called cell replication. Since there was only one set of DNA in the initial single cell, it must be precisely copied in order for both of the resultant cells to have the DNA they require to survive. Multicellular organisms reproduce primarily by repeatedly replicating their cells, followed by differentiating those cells. Literally one billionth of an error is caused by incorrect DNA copying. However, it is this tendency that permits