Question

After transcription, nuclear RNA is capped, polyadenylated, spliced. After successful splicing, proteins are added to the mature mRNA at the exon junction complex and then transported to the cytoplasm. Which of the following is a NOT a reason why these modifications are added to mRNA?1. to aid in transport from ribosome to cytoplasm through pore2. to stabilize mRNA molecule3. to signal to the cell that mRNA is ready for translation4. to identify the RNA molecule as mRNA

Answer 1

The correct answer is: A) to aid in transport from ribosome to cytoplasm through pore.

Step-by-step explanation:

RNA goes through many modifications in order to become a stable molecule with the proper signal to guide it to its destination and for it to be identified as what it really is; but these modifications do not aid in transport.

The transport of molecules from the nucleus to the cytoplasm is given when the nuclear export receptors receive the signal to export a molecule, and this exportation happens when the GTPase Ran gets involved to transport this molecule.

If an mRNA molecule does not have its necessary modifications, it won't reach its destination and won't be able to be translated into a protein.