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).
1 DNA replication-The nucleus can make exact copies of its DNA. 2  Transcription-The nucleus makes RNA which can be used to carry messages and copies of DNA instructions. 3  Translation-The RNA is used to configure amino acids into special proteins for use in the cell.