Before revision:  Here, we demonstrate that without changing the physiological condition, a DNA may be brought to a new dynamic state from the zipped or unzipped state by varying the frequency of the applied force.
After revision:  Here, we demonstrate that without changing the physiological condition, a DNA may be brought to a new dynamic state from the zipped /unzipped state to a new dynamic (hysteretic) state by varying the frequency of the applied force.