A mutation has changed the sequence in a codon from UGG to UGA.Using the codon chart provided in this figure,determine the change in the amino acid sequence.

A)from tryptophan to stop
B)from glycine to glutamine
C)from start to stop
D)from threonine to threonine

Question

A mutation has changed the sequence in a codon from UGG to UGA.Using the codon chart provided in this figure,determine the change in the amino acid sequence.

A)from tryptophan to stop 
B)from glycine to glutamine 
C)from start to stop 
D)from threonine to threonine

Quizplus · Accepted Answer

UGG codes for tryptophan and UGA codes for stop. Therefore, the change in the codon sequence results in a change from tryptophan to stop, which prematurely terminates the protein sequence.

A Mutation Has Changed the Sequence in a Codon from UGG