Final answer:
The final step in translation is the ribosome releasing the mRNA after reaching a stop codon.
Step-by-step explanation:
The final step in translation is D. The ribosome releases the mRNA after reaching a stop codon. During translation, the ribosome moves along the mRNA molecule, reading the codons and synthesizing a polypeptide chain. When the ribosome reaches a stop codon, it signals the release of the mRNA and the completion of translation.
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