In that case, the sequence you just listed could be part of an untranslated region in the DNA, or it could also be a translated region. It's just one segment of the DNA. Without any questions concerned with it, that's as much as you can know.
umm gug, but that's only one thing :( and then the next question would be like, adding a G to the eigth nucleotide of the DNA template, why is the mRNA (amino acids) sequence shorter. BUt instead it would be longer as GUG occurs earlier.
If there is no start codon present, you can usually assume that the sequence given is in the middle of a region being translated. It usually isn't a trick question about "there's no start codon, so no polypeptide is produced." There may be a stop codon present as well, which would terminate translation, but again, if there is none then the strand is a mid-region. As for the extra base, it is negligible because obviously no amino acid has a guanine-only tRNA complement.
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