2007-04-24 23:43:42 · 4 answers · asked by bebaof1@sbcglobal.net 1 in Science & Mathematics ➔ Biology
The actual duplication of the DNA double strand happens in S-phase (S for synthesis), but the preparation for DNA replication - which include loading of the Origin Recognition Complex (ORC) onto the DNA origins, as well as of the ATPases Cdc6 and Cdt1, which lead to the licensing of the DNA by the helicases MCMs - occur in G1 in mammalian cells and as early as late M phase in yeast.
These events are essential for the DNA replication to initiate, i.e. for the DNA polymerases (delta and epsilon, mainly) to start the synthesis on the new DNA strand.
Hei ecolink, did you notice that we got a thumb down because we are top contributors? How sad!
2007-04-25 08:37:32 · answer #1 · answered by Jesus is my Savior 7 · 0⤊ 1⤋
It occurs during the synthesis phase, also called S phase. This phase lasts for a few hours and precedes the G2/M phases, when the DNA is brought to the two opposite poles of the cell
2007-04-25 00:24:26 · answer #2 · answered by Raffaela S 5 · 1⤊ 0⤋
during the S, or synthesis, stage of interphase
2007-04-24 23:49:27 · answer #3 · answered by ecolink 7 · 0⤊ 1⤋
its true... the 's' or synthesis phase...I just keep forgetting :S
2007-04-25 00:41:53 · answer #4 · answered by alix_xander 2 · 0⤊ 0⤋