Final answer:
The peptide translated from the mRNA sequence 5'-AUGGGCUACCGA-3' would be four amino acids long as the sequence can be divided into four codons before a stop codon: AUG (start codon), GGC, UAC, and CGA.
Step-by-step explanation:
The Mightiest Governor event in the context of this question is not specified, but since you've provided a question related to mRNA and peptides, we'll address that instead. To determine how long the peptide translated from an mRNA sequence is, we need to understand that mRNA is read in triplets, known as codons, during the translation process. Each codon represents an amino acid, except for stop codons, which signal the end of translation.
The mRNA sequence provided is 5'-AUGGGCUACCGA-3'. Starting with the first AUG, which is the start codon, we can split the sequence into codons: AUG GGC UAC CGA. The first codon, AUG, codes for the beginning of any polypeptide chain. After that, the sequence contains three more codons before reaching a sequence that doesn't align with the codon table for amino acids. This would lead us to predict the sequence encodes a peptide that is four amino acids long, as there are no stop codons within this sequence. The correct answer to the provided question is therefore (d) 4.