Mechanism of DNA Replication (Basic)
Using computer animation based on
molecular research, we are now able to see how DNA is actually copied in living cells. You’re looking at an assembly line of
amazing miniature biochemical machines that are pulling apart the DNA double
helix and cranking out a copy of each strand. The DNA to be copied enters the
production line from the bottom left. The whirling blue molecular machine is called helicase. It spins the DNA as fast as a jet engine as it unwinds the double helix into two
strands. One stand is copied continuously and can be seen spooling off to the right. Things are not so simple for the other strand because it must be copied backwards. It is drawn out repeatedly in loops
and copied one section at a time. The end result is two new DNA molecules.