Final answer:
The statement is false because DNA Primase is not responsible for adding the poly-A tail to mRNA; the enzyme that performs this function is called poly-A polymerase.
Step-by-step explanation:
The statement is false; DNA Primase does not add the poly-A tail to the mRNA. Instead, the enzyme responsible for adding the poly-A tail to the mRNA is poly-A polymerase. The poly-A tail is a string of adenine nucleotides, approximately 200 A residues, added to the 3' end of the pre-mRNA after transcription. This process occurs once elongation is complete and it is essential for the stability and export of mRNA from the nucleus to the cytoplasm for translation. DNA Primase, on the other hand, is an enzyme that synthesizes short RNA primers during DNA replication to provide a starting point for DNA synthesis, particularly on the lagging strand.