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The initiation codon is the first codon of an mRNA sequence that is translated by the ribosome. It universally codes for methionine in eukaryotic cells and a modified form of methionine (fMet) in prokaryotic cells. The codon AUG is the most frequently used start codon.

1. (a)
2. (b)
3. (c)
4. (d)

Correct answer: (a)

Solution

The question directly states that the start codon is AUG, which is universally recognized as the start codon in both eukaryotes and prokaryotes. Thus, option (a) is correct.

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