Multiple Choice
Unprocessed mRNA is exported from the nucleus to be processed before translation.
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5. DNA to RNA to Protein
mRNA Export and Nuclear Structures
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In eukaryotic cells, can RNA leave the nucleus, and if so, which statement best describes how mRNA is exported?
A
Yes; mature mRNA is exported through nuclear pore complexes (NPCs) as an mRNP particle after processing such as capping, splicing, and polyadenylation.
B
No; RNA is permanently retained in the nucleus, and only proteins can cross the nuclear envelope.
C
Yes; mRNA is exported through gap junctions that connect the nucleus directly to the cytosol.
D
Yes; mRNA diffuses freely across the nuclear envelope lipid bilayer without using nuclear pore complexes.
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