Just prior to mitosis, the DNA inside a cell is copied through a process called replication. During replication, each strand of DNA acts as a template for the construction of a new, complementary
DNA strand.
After division, the resulting cells each contain one of the old strands, and a newly formed
complementary strand.
What is the purpose of this process?
A.
It ensures that the new cell has a complete, accurately sequenced set of
chromosomes.
В.
It increases the rate of cellular repair inside tissues.
C.
It rearranges the nucleotide sequences, so different types of tissues can be produced.
D.
It produces mutations that stop the expression of lethal recessive traits.

DNA replication is the process by which DNA makes a copy of itself during cell division.

Explanation:

The first step in DNA replication is to ‘unzip’ the double helix structure of the DNA? molecule.

This is carried out by an enzyme? called helicase which breaks the hydrogen bonds? holding the complementary? bases? of DNA together (A with T, C with G).

The separation of the two single strands of DNA creates a ‘Y’ shape called a replication ‘fork’. The two separated strands will act as templates for making the new strands of DNA.

DNA replication is the process by which DNA makes a copy of itself during cell division.

Explanation:

The first step in DNA replication is to ‘unzip’ the double helix structure of the DNA? molecule.

a- all cells come from pre-existing cells