iGen3 03-09

Bi-directional DNA synthesis

DNA replication typically proceeds in both directions simultaneously at any particular replicon. Note that the leading and lagging strands at the two replication forks are on opposite physical strands of the dsDNA starting at the Origin of Replication.

HOMEWORK: The diagram above is mislabelled: the upper blue strand has two 5' ends, and the lower two 3' ends. Based on the complete figure, what is the simplest change to be made in the labelling of the blue strands that will produce a correct figure ?

Figure © 2010 PJ Russell, iGenetics 3rd ed.; all text material © 2014 by Steven M. Carr