DNA is alive?
On dead DNA whats missing?.."
Assuming you are referring to a cell containing DNA, the dead cell has reached energy equilibrium.
"Is DNA machinery? or more than that?.."
Define 'machinery'.
DNA is a large molecule made of chemicals which react to other chemicals in potentially predictable ways, just as all other molecules do.
Are you trying to say that 'living' DNA has some elusive, more than material, magical ethereal substance you label as 'life'? Is this something only those who live in the zeroth reality can observe, while those of us stuck in the materialistic first reality are doomed to never see?