Since the cell is dividing it needs two copies of its DNA - one is kept by the parent cell and the other is passed to the daughter cell. If cells don't replicate their DNA or don't do it completely, the daughter cell will end up with no DNA or only part of the DNA. This cell will likely die.
People also ask, why is it so important for DNA replication to be done accurately?
If the DNA is not accurately replicated, the changes could lead to non-functional proteins. This could lead to cell death, or if the protein was responsible for controlling cell division it could lead to cancer. Replication of DNA should occur reliably because its the main process needed for a cell to divide.
Additionally, what triggers DNA replication?
The initiation of DNA replication occurs in two steps. First, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands.
Why must DNA replicate before a cell divides?
Explanation: 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!
What happens when DNA replicates?
Replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. DNA replication is one of the most basic processes that occurs within a cell. To accomplish this, each strand of existing DNA acts as a template for replication.