Each tRNa molecule was found to function as an adapter (originally hypothesized by francis Crick) carrying a specific amino acid with one site and recognizing a specific site on a template with another site The concept of messenger RNa(mRNA) was boldly formulated by Jacob and Monod in 1961: a short-lived RNA Should serve as the information carrier between gene and protein(to explain the quick induction of proteins in E coli) This bold hypothesis was quickly confirmed by studies of E coli cells infected by T2 phages• Each tRNA molecule was found to function as an adapter (originally hypothesized by Francis Crick), carrying a specific amino acid with one site and recognizing a specific site on a template with another site. • The concept of messenger RNA (mRNA) was boldly formulated by Jacob and Monod in 1961: a short-lived RNA should serve as the information carrier between gene and protein (to explain the quick induction of proteins in E.coli). • This bold hypothesis was quickly confirmed by studies of E.coli cells infected by T2 phages