Answer :
1.uncoiling of the parent DNA molecule
2.unzipping the hydrogen bonds between the base pairs
3.synthesis of two new DNA strands
4. two DNA molecules, each with one old and one new strand
REPLICATION FORK
To synthesise DNA, the double-stranded DNA is unwound by DNA helicases ahead of polymerases, forming a replication fork containing two single-stranded templates. Replication processes permit the copying of a single DNA double helix into two DNA helices, which are divided into the daughter cells at mitosis
PRIMER BINDING
Primer Binding. The leading strand is the simplest to replicate. Once the DNA strands have been separated, a short piece of RNA called a primer binds to the 3' end of the strand. The primer always binds as the starting point for replication
ELONGATION
Elongation. During elongation, an enzyme called DNA polymerase adds DNA nucleotides to the 3′ end of the newly synthesized polynucleotide strand. The template strand specifies which of the four DNA nucleotides (A, T, C, or G) is added at each position along the new chain
TERMINATION
when two replication forks meet on the same stretch of DNA, during which the following events occur, though not necessarily in this order: forks converge until all intervening DNA is unwound; any remaining gaps are filled in and ligated; catenanes are removed; replication proteins
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