Which one of the following is the start codon?

AUG

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UGA

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UAA

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UAG

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Solution

The correct option is A AUG
AUG is start codon that codes for methionine whereas UGA, UAA and UAG are stop codons.
The start codon is the initiation signal for translation that is found on a messenger RNA (mRNA) strand and the stop codon marks the site at which translation ends.

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