A polyribonucleotide was prepared from the tetranucleotide UAUC.When it was subjected to peptide-synthesizing conditions, the polypeptide, Tyr-Leu-Ser-Ile, was obtained.What is the codon for Ser?

Question

Quizplus · Accepted Answer

The codon for Serine (Ser) can be deduced from the sequence of the polypeptide Tyr-Leu-Ser-Ile, which corresponds to the tetranucleotide UAUC. Given the sequence and the resulting polypeptide, the codon for Ser must be UCU, as it fits the pattern of translation from RNA to amino acid sequence, where UAU codes for Tyr, AUC for Ile, and thus by elimination and understanding of the genetic code, UCU codes for Ser.

A Polyribonucleotide Was Prepared from the Tetranucleotide UAUC