Which of the following types of mutations can affect the length of the mRNA molecule? Check all that apply.
O Substitution mutation in an intron.
O Deletion of 1 nt in an exon.
O Deletion of 2 nt within an intron that does not affect splicing.
O Addition of 3 nt within an exon.
O Addition of 2 nt within an exon.
O Substitution mutation in the middle of an exon.
O Deletion of 3 nt within the 3' UTR.
O Addition of an AUG within the 5' UTR.
O Substitution mutation within the 3' UTR