Changes

==Structure==

==Structure==

Most commonly as a double-stranded [[helix]] comprising two complimentary molecules held together by hydrogen bonds, this is commonly called "dsDNA" (double-stranded DNA).<ref>Single-stranded DNAs (ssDNA) do exist in certain [[bacteriophage]]s, however they cannot be replicated without first creating the complimentary strand to use as a template.</ref>  The  [[nucleotide]]s which are the "building blocks" of DNA have three main parts: A nitrogenous base (the "letters" in the sequence), a [[sugar]], and a [[phosphate]] group.  When nucleotides are joined into DNA strands, they form a chain with the phosphate group of one nucleotide binding to the ribose of the next.

Most commonly as a double-stranded helix comprising two complimentary molecules held together by hydrogen bonds, this is commonly called "dsDNA" (double-stranded DNA).<ref>Single-stranded DNAs (ssDNA) do exist in certain [[bacteriophage]]s, however they cannot be replicated without first creating the complimentary strand to use as a template.</ref>  The  [[nucleotide]]s which are the "building blocks" of DNA have three main parts: A nitrogenous base (the "letters" in the sequence), a [[sugar]], and a [[phosphate]] group.  When nucleotides are joined into DNA strands, they form a chain with the phosphate group of one nucleotide binding to the ribose of the next.

DNA strands "compliment" each other by having compatible sequences, allowing the bases on one strand to form bonds with the bases on the other strand.  There are four nitrogenous bases, Adenonine (A), Cytosine (C), Guanine (G), and Thymine (T).  Under the base pairing rules, A pairs with T and G pairs with C. This allow cell to repair the DNA correctly if only one strand is damaged.  

DNA strands "compliment" each other by having compatible sequences, allowing the bases on one strand to form bonds with the bases on the other strand.  There are four nitrogenous bases, Adenonine (A), Cytosine (C), Guanine (G), and Thymine (T).  Under the base pairing rules, A pairs with T and G pairs with C. This allow cell to repair the DNA correctly if only one strand is damaged.  

DNA contains [[gene]]s that encode for [[protein]]s. These are produced by the DNA first being turned into m[[RNA]] and then into polypeptides (this process is called the [[Central dogma of molecular biology|central dogma]] of molecular biology). All organisms use DNA as their hereditary material.  

DNA contains [[gene]]s that encode for [[protein]]s. These are produced by the DNA first being turned into m[[RNA]] and then into polypeptides (this process is called the [[Central dogma of molecular biology|central dogma]] of molecular biology). All organisms use DNA as their hereditary material.

==Organisation==

==Organisation==