However, in the half-century since the structure of DNA was first elaborated, scientists have learned that RNA does much more than simply play a role in protein synthesis. For example, many types ...

This process of protein synthesis occurs in two stages - transcription and translation. When a gene is to be expressed, the base sequence of DNA is copied or transcribed into mRNA (messenger RNA).

For example, when A and C were mixed with polynucleotide ... acts as the start signal for protein synthesis in an mRNA. Moreover, the genetic code also includes stop codons, which do not code ...