Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Model for Double-Stranded Excitations of DNA   We calculate the spectrum of torsional vibrations of a double-stranded
structure that models the double helix of the DNA. We come to the conclusion
that within the framework of the model elementary excitations may display an
asymmetry as regards their winding and direction of the propagation, depending
on initial polarization. The asymmetry could have a bearing on processes that
take place in molecules of the DNA.

13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ