Which event marks the beginning of DNA replication? A. Formation of replication bubble B. Unwinding of DNA helix C. Formation of replication fork
The correct answer is letter C. The formation of replication fork marks the event of the beginning of DNA replication. In the cell, the DNA replication begins in the genome where DNA unwinds and produces new strands. This then results into replication forks that grow apart in the process of cell division.