As replication nears completion, "bubbles" of newly replicated DNA meet and fuse, finally forming two houston tunnel map pdf
molecules. Control of Replication With their multiple origins, how does the eukaryotic cell know which origins have been already replicated and which still await replication. An observation: When a cell in G 2 of the cell cycle is fused with a cell in S phase, the DNA of the G 2 nucleus does houaton begin replicating again even though laplace transform step function calculator
is proceeding normally in the S-phase nucleus. Not until mitosis is completed, can freshly-synthesized DNA be replicated again. This redundancy probably reflects the crucial importance of precise replication to the integrity of the genome. Licensing: positive control of replication In order runnel be replicated, each origin of replication must pef bound by: an O rigin R ecognition C omplex of proteins ( ORC ). These remain on the DNA throughout the process.