If a gene encodes a polypeptide of 50 amino a | vedclass

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Question

(A) The codon $UAA$ is a stop codon (also known as a nonsense codon). When the $25^{th}$ codon mutates to $UAA$,the translation process will terminate

Vedclass · Accepted Answer

$A$ polypeptide of $24$ amino acids will be formed.

Vedclass · Answer

(A) The codon $UAA$ is a stop codon (also known as a nonsense codon). When the $25^{th}$ codon mutates to $UAA$,the translation process will terminate prematurely at the $24^{th}$ amino acid position. Since the ribosome stops adding amino acids after the $24^{th}$ one,a truncated polypeptide chain consisting of only $24$ amino acids will be synthesized. Therefore,the correct answer is that a polypeptide of $24$ amino acids will be formed.

Column-$I$	Column-$II$
$A$. $AUG$	$1$. Phenylalanine
$B$. $UAA$	$2$. Methionine
$C$. $UUU$	$3$. Tryptophan
$D$. $UGG$	$4$. Stop

If a gene encodes a polypeptide of $50$ amino acids and the $25^{th}$ codon mutates to $UAA$,what will be the result?

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Choose the correct pair.

Column-$I$ Column-$II$

$A$. $AUG$ $1$. Phenylalanine

$B$. $UAA$ $2$. Methionine

$C$. $UUU$ $3$. Tryptophan

$D$. $UGG$ $4$. Stop

In the genetic code,$61$ codons code for $20$ different types of amino acids. This is called:

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