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).
Secondarily, DNA serves the purpose of biological synthesis in terms of the creation of cellular proteins and RNA molecules. The DNA molecule consists of two long polymer chains of simpler molecular units called nucleotides. The nucleotides have 'backbones' attached to them made out of sugars and phosphates.NA directs the synthesis of RNA under a chemical process known as transcription. Basically, what happens, is that cellular enzymes are directed by the genetic code itself to recreate strands of RNA in relation to the coded sequences stored in the DNA itself.