Schematic Diagram of DNA replication
The old
strands
separate, and new bases are added to either strand according
to the
base pairing rules. Bases are added only at the 3' end, and the 5' end remains unmodified.
That is, extension on either strand occurs only in
the 5'
3'
direction.
3'
direction.Figure © 2004 Griffiths et al.; all text material © 2013 by Steven M. Carr