HE201 Lecture Notes - Lecture 24: The Double Helix, Polynucleotide, Base Pair
Document Summary
Reading for lecture 2 structure of dna. After the lecture you should understand that: dna is a polymer in which the individual units are called nucleotides. There are four different nucleotides, usually referred to as a, c, g and t, the abbreviations of their full chemical names. Nucleotides can be linked together in any order: the sequence of nucleotides in a dna molecule is a language made up of the four letters. A, c, g and t. the biological information contained in a gene is written in this language: the double helix structure reveals how dna molecules are able to replicate. B- dna is the commonest type in the cell. 3 oh terminus the end of a polynucleotide that terminates with a hydroxyl group attached to the 3 -carbon of the sugar. 5 p terminus the end of a polynucleotide that terminates with a mono-, di- or triphosphate attached to the 5 -carbon of the sugar.
