2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/19302A model of self-avoiding walk with suitable constraints on self-attraction is developed to describe the conformational behaviour of a single stranded short DNA molecule that form hairpin structure. Using exact enumeration method we calculate the properties associated with coil-hairpin transition. Our results are in qualitative agreement with the experiment.8 pages (in Revtex4), 4 eps figs.; submitted to Phys. Rev. ESoft Condensed MatterStatistical MechanicsQuantitative Biologytext