A Poly-A Tail Is Added to an MRNA by

A poly-A tail is added to an mRNA by

A) RNA polymerase, which reads a string of complementary dTs at the end of the gene.
B) poly-A polymerase, which adds A's sequentially to the end of the transcript.
C) poly-A transferase, which adds a pre-made poly-A sequence to the end of the transcript.
D) poly-A correctase, which recognizes an AAUAAA signal at the end of the message and changes the U to an A.