Answer: DNA replication needs to occur because existing cells divide to produce new cells. So the DNA needs to be copied before cell division so that each new cell receives a full set of instructions.
Step-by-step explanation:
During cell division, a cell must replicate its DNA, and if there are errors Before a cell can divide, many processes must occur, including the proper Mitosis is the phase when the cell actually divides into two cells, known as daughter cells. giving replication enzymes access to create a new copy of each chromosome.