Chem288_2005_PS3 - Spring 2005 Problem Set 3 Chemistry 288...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Spring 2005 Problem Set 3 Chemistry 288 Marohn Handed out: Friday, 11 February 2005 Due: Thursday, 17 February 2005 1. Double-stranded DNA melting. DNA exists as a twisted pair of polymer molecules, each with N monomer units. The two molecules are cross-linked by N base pairs. It requires an energy to unlink each base pair, and a base pair can be unlinked only if it has a neighboring base pair that is already unlinked (or if it is at the end of the molecule). Suppose that there are G orientations which each open link can assume: that is, the open state of a link is G-fold degenerate, corresponding to rotational freedom of the chain in the uncrosslinked state. (a) Find the probability that n pairs are unlinked at temperature T if one end of the molecule is prevented from unlinking, so the molecule unwinds from only end. (b) Calculate the average number ( n ) of pairs unlinked at a given temperature T ....
View Full Document

This note was uploaded on 09/28/2008 for the course CHEM 2880 taught by Professor Freed, j during the Spring '06 term at Cornell University (Engineering School).

Ask a homework question - tutors are online