  The helical coil is ubiquitous in biological and natural systems and often it
is the basic form that leads to complex structures. This paper considers the
question of its dimensionality in biological information as the helical coil
goes through recursive coiling as happens to DNA and RNA molecules in
chromatin. It has been shown that the dimensionality of coiled coils is
virtually equal to e. Of the three forms of DNA, the dimensionality of the
B-form is nearest to the optimal value and this might be the reason why it is
most common.
