<P> The major event in S - phase is DNA replication . The goal of this process is to create exactly two identical semi-conserved chromosomes . The cell prevents more than one replication from occurring by loading pre-replication complexes onto the DNA at replication origins during G phase which are dismantled in S - phase as replication begins . In synthesis , the enzyme helicase unwinds the DNA double helix , and the enzyme DNA polymerase re-binds free - floating nucleotides to the separate DNA single strands in accordance with the complementary base pairing rule . DNA synthesis can occur as fast as 2000 nucleotides / second and must create fewer than 2 errors ( I.e. , wrong bases ) in 10 nucleotide additions . </P>
<P> The major event in S - phase is DNA replication . The goal of this process is to create exactly two identical semi-conserved chromosomes . The cell prevents more than one replication from occurring by loading pre-replication complexes onto the DNA at replication origins during G phase which are dismantled in S - phase as replication begins . In synthesis , the enzyme helicase unwinds the DNA double helix , and the enzyme DNA polymerase re-binds free - floating nucleotides to the separate DNA single strands in accordance with the complementary base pairing rule . DNA synthesis can occur as fast as 2000 nucleotides / second and must create fewer than 2 errors ( I.e. , wrong bases ) in 10 nucleotide additions . </P>
why is the synthesis stage ( s phase ) called synthesis
why is the synthesis stage ( s phase ) called synthesis
DNA replication
DNA replication