Chapter 28.2, Problem 28.2P

Interpretation Introduction

Interpretation:

The structural formula for the section of DNA that contains the base sequence CTG and is phosphorylated at $\text{3'}$ end only has to be drawn.

Concept Introduction:

The DNA consists of Nucleotides which are linked together by phosphodiester linkages.  The DNA is a Deoxyribo Nucleic Acid, the sugar unit is 2-deoxy-D-ribose.  The phosphodiester linkages are formed when the hydroxyl group ($\text{-OH}$) present at $\text{5'}$ position of one nucleotide is linked with $\text{3'}$ hydroxyl group ($\text{-OH}$) of another nucleotide by a phosphate ion.  This phosphodiester linkages of nucleotides forms the backbone of the DNA structure.  The bases present in the DNA sequence are read from $\text{5'}$ end to $\text{3'}$ end.