3. which of the following would not prevent an mrna from being transported to the rough endoplasmic
reticulum in the cytoplasm?

the ends of the mrna were not modified.
the mrna was not correctly spliced
the mrna was not bound by a ribosome.
the mrna is for a secreted protein.

5. what type of mutation could cause the 3-nucleotide reading frame of trna to be shifted?

switching a normal nucleotide for an abnormal one
deletion of one or more nucleotides during replication
replacing an amino group
incorrect base pairing