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Question

Which one of the following is start codon?

A
AUG
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B
UGA
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C
UAA
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D
UAG
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Solution

The correct option is A AUG
Codons are the nucleotide base triplets that specify a particular amino acid in proteins. The start codon specifies the first codon of mRNA transcript that is translated. It codes for methionine in eukaryotes and a modified Met in prokaryotes. "AUG" is the most common start codon. AUG and UGA are start and stop codons respectiveiy. Thus, the correct answer is option A.

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