Q. Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?
A) AUG, ACG - Start/methionine
B) UUA, UCA - Leucine
C) GUU, GCU - Alanine
D) UAG, UGA - Stop
Explanation
AUG codes for methionine and is initiation or start codon which starts the synthesis of polypeptide. UAA (ochre), UAG (amber) and UGA (opal) do not specify any amino acid so they are called termination codons. CUU, CUC, CUA and CUG codes for leucine whereas GCU, GCC, GCA and GCG codes for alanine.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.