Answer:
The correct answer is mRNA is not bound by a ribosome.
Step-by-step explanation:
mRNA or messenger RNA is being modied for its transport from nucleus to the cytoplasm.The modifications are listed below
1 5" capping
2 3" tailing
3 splicing
If one these three events does not occur in newly formed mRNA or primary mRNA transcript then the mRNA will be prevented to be transported from nucleus to the cytoplasm.
But if the mRNA is not bound to the ribosome then this wil not not prevent mRNA to be transported into the cytoplasm because the binding of ribosome to mRNA occur after the mRNA has reached the cytoplasm.