Hurricane Odile was the most powerful storm to hit Cabo San Lucas on the Baja California peninsula in Mexico. A Category 3 hurricane when it made landfall, Odile had winds of 125 mph. But the hurricane is losing strength as it moves north.
The cell cycle or cell-division cycle is the series of events that take place in a cell leading to its division and duplication of its DNA (DNA replication) to produce two daughter cells. In bacteria, which lack a cell nucleus, the cell cycle is divided into the B, C, and D periods. The B period extends from the end of cell division to the beginning of DNA replication. DNA replication occurs during the C period.
DNA Replication. Before a cell can divide, it must duplicate all its DNA. In eukaryotes, this occurs during S phase of the cell cycle. The Biochemical Reactions. DNA replication begins with the unzipping of the parent molecule as the hydrogen bonds between the base pairs are broken. Once exposed, the sequence of bases on each of the separated strands serves as a template to guide the insertion of a complementary set of bases on the strand being synthesized.