The given m-RNA sequence is ready for transla | vedclass

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(D) To determine the number of amino acids,we must identify the open reading frame starting from the start codon $(AUG)$ and ending at the first stop

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$3$

Vedclass · Answer

(D) To determine the number of amino acids,we must identify the open reading frame starting from the start codon $(AUG)$ and ending at the first stop codon.$1$. The sequence is $5'-AUG\ CUA\ UAC\ UAA\ CUG\ CCA\ UGC\ UAG-3'$.$2$. The start codon is $AUG$,which codes for Methionine.$3$. The codons are read in triplets: $AUG$ (Met),$CUA$ (Leu),$UAC$ (Tyr),$UAA$ (Stop).$4$. The codon $UAA$ is a stop codon (nonsense codon),which signals the termination of protein synthesis.$5$. Therefore,the translation stops at $UAA$,and the amino acids incorporated are Methionine,Leucine,and Tyrosine.$6$. The total number of amino acids in the polypeptide chain is $3$.

The given $m-RNA$ sequence is ready for translation: $5'-AUG\ CUA\ UAC\ UAA\ CUG\ CCA\ UGC\ UAG-3'$. How many amino acids will be present in the polypeptide chain translated from this $m-RNA$?

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