Refer to the figure, which shows the genetic code. Which single base substitution in the coding strand of DNA would result in premature termination of translation?
A) CAA to CAG
B) CCT to CCC
C) CGA to UGA
D) GAG to TAG
E) CTG to CTT

Question

Refer to the figure, which shows the genetic code.  Which single base substitution in the coding strand of DNA would result in premature termination of translation?
A) CAA to CAG 
B) CCT to CCC 
C) CGA to UGA 
D) GAG to TAG 
E) CTG to CTT

Quizplus · Accepted Answer

The codon CGA codes for the amino acid arginine, but if it is changed to UGA, it becomes a stop codon, causing premature termination of translation.

Refer to the Figure, Which Shows the Genetic Code