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Question
Identify initiation codon of mRNA from the following.
Options
UAA
AUG
UAG
UGA
MCQ
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Solution
AUG
Explanation:
AUG is the universal start (initiation) codon in mRNA and specifies methionine in eukaryotes (and a modified methionine in bacteria). Translation typically begins when a ribosome recognises AUG in the proper context, so UAA/UAG/UGA act as stop (termination) codons, not starts.
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