It has been recently determined that the gene for Duchenne muscular dystrophy (DMD) is more than 2000 kb (kilobases) in length; however, the mRNA produced by this gene is only about 14 kb long. What is a likely cause of this discrepancy?
◦ More amino acids are coded for by the DNA than by the mRNA.
◦ When the mRNA is produced, it is highly folded and therefore less long.
◦ The exons have been spliced out during mRNA processing.
◦ The introns have been spliced out during mRNA processing.
◦ The DNA represents a double-stranded structure, whereas the RNA is single-stranded.