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 proposed flow of genetic information from DNA to RNA to protein became known as the Central Dogma.. As it turned out, several types of RNA are involved in the utilization of genetic information. In the nucleus, the DNA code is transcribed, or copied, into a messenger RNA (mRNA) molecule. In the cytoplasm, the mRNA code is translated into amino acids. Translation is orchestrated at the ribosome â itself partly composed of RNA â with transfer RNA playing the role of adaptor.