why is stop and start codon signals necessary for protein synthesis ?

Start codons is necessary for the start of protein at accurate site on mRNA sequence, while stop codon is necessary for termination of protein synthesis. if any of them either start or stop codon attach at inappropriate place in mRNA sequence it will lead to abnormal protein synthesis.

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luisvaschetto luisvaschetto · Answer 2 · 2021-11-08T15:30:14+01:00

The stop codons and the start codon are fundamental because these codons SPECIFY the length of the resulting PROTEIN SEQUENCE during protein synthesis (translation).

A codon is a triplet of nucleotides in the messenger RNA (mRNA) that determines a specific amino acid, which will be added to the nascent polypeptide chain (i.e., the protein) during translation.

There are 64 codons, 61 of which encode 20 different amino acids, whereas 3 codons specify stop signals that end the process of translation (UAG, UAA, and UGA).

The codon AUG is the first codon in the transcribed mRNA sequence, which encodes the methionine amino acid.

Both start codons and stop codons are fundamental because they indicate where to start and where to finish the process of protein synthesis, respectively.

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