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

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

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-$II$
$(a)$ $UUU$	$(1)$ Serine
$(b)$ $GGG$	$(2)$ Methionine
$(c)$ $UCU$	$(3)$ Phenylalanine
$(d)$ $CCC$	$(4)$ Glycine
$(e)$ $AUG$	$(5)$ Proline

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

Similar Questions

Match the columns.

Column-$I$ Column-$II$

$(a)$ $UUU$ $(1)$ Serine

$(b)$ $GGG$ $(2)$ Methionine

$(c)$ $UCU$ $(3)$ Phenylalanine

$(d)$ $CCC$ $(4)$ Glycine

$(e)$ $AUG$ $(5)$ Proline

The first codon discovered by $Nirenberg$ and $Matthaei$ was:

What is indicated by $AUG$?

Khorana and his colleagues synthesized an $RNA$ molecule with a repeating sequence of $U$ and $G$ nucleotides. The $RNA$ sequence "$UGU\ GUG\ UGU\ GUG$" produced a tetrapeptide with alternating chains of cysteine and valine. The codons for cysteine and valine are, respectively:

If an $RNA$ sequence has $999$ bases and codes for a protein with $333$ amino acids,and the base at position $901$ is deleted,resulting in a sequence of $998$ bases,how many codons will be altered?

Vedclass Test Series

Exam Paper Generator

Online Exam Module