Molecular Basis of Inheritance Question 55

55. Which one of the following is the starter codon?

(a) AUG

(b) UGA

(c) UAA

(d) UAG

Show Answer

Answer : a

Hints & Solution

(a) The start codon is the first codon of a messenger RNA (mRNA) transcript translated by a ribosome. The start codon always codes for methionine in eukaryotes and a modified Met (fMet) in prokaryotes. The most common start codon is AUG.