Identify by giving reasons, the salient features of genetic code by studying the following nucleotide sequence of mRNA strand and the - polypeptide translated from it.
(AUG UUU UCU UUU UUU UCU UAG)
(Met; Phe - Ser - Phe - Phe - Ser)
Salient Feature of Genetic Code :
The codon is triplet.
One codon codes for only one amino acid, so it is unambiguous and specific.
AUG has dual function as it codes for methionine and it also acts as initiator codon.
UAG act as a stop codon.
Reason :
AUG, UUU, etc., are triplets.
UUU codes for serine,
AUG codes for methionine, etc.
AUG is seen at the beginning of the polypeptide chain.
No amino acid is coded by UAG in the polypeptide chain given.