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Question

The codon AUG has dual function. It is an initiation codon and also codes for

A
Formaldehyde
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B
Methionine
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C
Phenylalanine
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D
Serine
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Solution

The correct option is B Methionine
  • The first codon on mRNA is known as the initiation codon.
  • AUG is the start codon of mRNA which codes for amino acid methionine in eukaryotes and modified fMet in prokaryotes.
  • fMet is formylmethionine which is peculiar amino acid coded in prokaryotes. It is the first codon at which the translation of proteins begins, it is paired during the translation with the tRNA with anticodon UAC.
Thus, the correct answer is option B.

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