0845 numbers, for example, are free to call for up to an hour, during the inclusive minutes of your call package if you're a BT customer. Yet call an 0844 number and you'll be charged up to 5.1p/minute, plus a connection fee of up to 15p.
The resulting mRNA is a single-stranded copy of the gene, which next must be translated into a protein molecule. During translation, which is the second major step in gene expression, the mRNA is read according to the genetic code, which relates the DNA sequence to the amino acid sequence in proteins (Figure 2).
This RNA copy, or transcript of the DNA's information is called an mRNA. The m stands for messenger, because the function of mRNA is to carry the DNA's information out of the nucleus and into the cytoplasm to make proteins. This allows the precious DNA, the master copy of the info the cell needs to live, to stay safe inside the nucleus which helps protect it from damage.