Final answer:
Translation can initiate at different places on an mRNA molecule when the initiation complex scans the mRNA and locates a start codon in a favorable context, as per Kozak's rules. The correct option is B.
Step-by-step explanation:
The process of initiation of translation involves the small ribosomal subunit binding to the mRNA molecule. This is followed by the complexation with initiator tRNA and eventually the large ribosomal subunit. In eukaryotic cells, the initiation complex, after being assembled at the 5' cap of the mRNA, scans for a start codon, often AUG, in accordance with Kozak's rules for the consensus sequence.
This scanning process can initiate translation at different sites along the mRNA if multiple AUG codons are present and surrounded by a favorable context as per these rules. Therefore, the correct answer to the question about another means by which translation can be initiated in a different place along an mRNA molecule is: B) Transcriptional initiation.